Yamaha 25ELH v2 Owner's Manual
en
25
OWNERS MANUAL
6L2-28199-1U
U.S.A.Edition LIT-18626-07-91
q Read this manual carefully before operating this outboard motor.
6L2-9-1U Hyoshi 08.1.30 11:17 1
EMU25062
ZMU01690
Read this manual carefully before operating this outboard motor. Keep this manual onboard in a waterproof bag when boating. This manual should stay with the outboard motor if it is sold.
6L2-9-1U Hyoshi 08.1.30 11:17 2
Important manual information
EMU31283
To the owner
Thank you for choosing a Yamaha outboard motor. This Owners Manual contains infor- mation needed for proper operation, mainte- nance and care. A thorough understanding of these simple instructions will help you ob- tain maximum enjoyment from your new Yamaha. If you have any question about the operation or maintenance of your outboard motor, please consult a Yamaha dealer. In this Owners Manual particularly important information is distinguished in the following ways.
: This is the safety alert symbol. It is used to alert you to potential personal injury hazards. Obey all safety messages that fol- low this symbol to avoid possible injury or death.
WARNING
EWM00781
A WARNING indicates a hazardous situa- tion which, if not avoided, could result in
death or serious injury.
NOTICE
ECM00701
A NOTICE indicates special precautions that must be taken to avoid damage to the
outboard motor or other property.
TIP:
A TIP provides key information to make pro- cedures easier or clearer.
Yamaha continually seeks advancements in product design and quality. Therefore, while this manual contains the most current prod- uct information available at the time of print- ing, there may be minor discrepancies between your machine and this manual. If
there is any question concerning this manu- al, please consult your Yamaha dealer.
TIP:
The 25EH, 25ER, 25MH and the standard accessories are used as a base for the ex- planations and illustrations in this manual. Therefore some items may not apply to ev- ery model.
EMU25111
25 OWNERS MANUAL
2008 by Yamaha Motor Corporation, USA 1st edition, April 2008
All rights reserved. Any reprinting or unauthorized use without the written permission of Yamaha Motor Corporation, USA
is expressly prohibited. Printed in Japan
P/N LIT-18626-07-91
Table of contents
Safety information............................. 1
Outboard motor safety .................... 1
Propeller............................................ 1 Rotating parts.................................... 1 Hot parts ........................................... 1 Electric shock.................................... 1 Engine shut-off cord (lanyard)........... 1 Gasoline............................................ 1 Gasoline exposure and spills ............ 1 Carbon monoxide.............................. 1 Modifications ..................................... 2
Boating safety ................................. 2
Alcohol and drugs ............................. 2 Personal flotation devices ................. 2 People in the water ........................... 2 Passengers ....................................... 2 Overloading....................................... 2 Avoid collisions ................................. 2 Weather ............................................ 3 Accident reporting ............................. 3 Boat education and training .............. 3 Passenger training ............................ 3 Boating safety publications ............... 3 Laws and regulations ........................ 3
Boating organizations...................... 4 Basic boating rules (Rules of the
road) .............................................. 4
Steering and sailing rules and sound signals.................................. 4
Rules when encountering vessels .... 5 Other special situations..................... 6
General information .......................... 9
Identification numbers record.......... 9
Outboard motor serial number .......... 9 Key number....................................... 9
Read manuals and labels.............. 10
Warning labels ................................ 10
Specifications and requirements...13
Specifications ................................ 13 Installation requirements ............... 14
Boat horsepower rating................... 14 Mounting motor ............................... 14
Remote control requirements........ 14 Battery requirements..................... 15
Specifications of Battery ................. 15
Mounting battery .............................15 Multiple batteries .............................15 Without a rectifier or Rectifier
Regulator ......................................15
Propeller selection ........................ 15 Start-in-gear protection ................. 16 Engine oil requirements ................ 16 Fuel requirements ......................... 16
Gasoline ..........................................16 Ring Free Fuel Additive...................17
Muddy or acidic water ................... 17 Anti-fouling paint ........................... 17 Motor disposal requirements......... 18 Emergency equipment .................. 18 Emission control information......... 18
North American models...................18
Components .................................... 20
Components diagram.................... 20
Fuel tank .........................................20 Fuel joint..........................................21 Fuel gauge ......................................21 Fuel tank cap...................................21 Air vent screw..................................21 Remote control box .........................21 Remote control lever .......................21 Neutral interlock trigger ...................22 Neutral throttle lever ........................22 Choke switch...................................22 Tiller handle.....................................22 Gear shift lever ................................22 Throttle grip .....................................23 Throttle indicator .............................23 Throttle friction adjuster...................23 Engine shut-off cord (lanyard) and
clip.................................................24 Engine stop button ..........................24 Choke knob for pull type .................24 Manual starter handle .....................25 Starter button ..................................25 Main switch .....................................25 Steering friction adjuster .................25 Trim tab with anode.........................26 Trim rod (tilt pin) ..............................26 Shallow water lever .........................26 Tilt lock mechanism.........................27
Table of contents
Tilt support bar ................................ 27 Top cowling lock lever(s)
(turn type) ..................................... 27
Installation ....................................... 28
Installation ..................................... 28
Mounting the outboard motor .......... 28 Clamping the outboard motor ......... 29
Operation ......................................... 31
First-time operation ....................... 31
Breaking in engine .......................... 31 Getting to know your boat ............... 31
Checks before starting engine ...... 31
Fuel level......................................... 32 Remove cowling.............................. 32 Fuel system..................................... 32 Controls........................................... 32 Engine shut-off cord (lanyard)......... 33 Oil.................................................... 33 Engine............................................. 33 Install cowling.................................. 33 Battery............................................. 34
Filling fuel and engine oil............... 34
Filling fuel for portable tank............. 34 Gasoline and oil mixing (100:1) ...... 34
Operating engine........................... 35
Feeding fuel (portable tank) ............ 35 Starting engine................................ 36
Checks after starting engine ......... 43
Cooling water .................................. 43
Warming up engine ....................... 43
Choke start models ......................... 43
Checks after engine warm-up ....... 43
Shifting ............................................ 43 Stop switches.................................. 43
Shifting .......................................... 44 Stopping boat ................................ 45 Stopping engine ............................ 45
Procedure ....................................... 45
Trimming outboard motor.............. 46
Adjusting trim angle for manual tilt models .......................................... 47
Adjusting boat trim .......................... 47
Tilting up and down ....................... 48
Procedure for tilting up (manual tilt models) .................................... 49
Procedure for tilting down (manual tilt models).....................................49
Shallow water................................ 50
Cruising in shallow water (manual tilt models).....................................50
Cruising in other conditions........... 51
Maintenance .................................... 52
Transporting and storing outboard motor ........................................... 52
Clamp screw mounting models .......52 Storing outboard motor ...................52 Procedure........................................53 Lubrication.......................................54 Cleaning and anticorrosion
measures ......................................54 Cleaning the outboard motor...........54 Checking painted surface of
motor.............................................54
Periodic maintenance ................... 54
Replacement parts ..........................55 Maintenance interval guidelines......55 Maintenance chart 1........................56 Maintenance chart 2........................58 Greasing..........................................59 Cleaning and adjusting spark
plug ...............................................59 Checking fuel filter...........................60 Inspecting idling speed....................60 Checking wiring and connectors .....61 Checking propeller ..........................61 Removing propeller .........................62 Installing propeller ...........................62 Changing gear oil ............................63 Cleaning fuel tank ...........................64 Inspecting and replacing
anode(s)........................................64 Checking battery (for electric start
models) .........................................65 Connecting the battery ....................65 Disconnecting the battery................66
Trouble Recovery............................ 67
Troubleshooting ............................ 67 Temporary action in emergency ... 70
Impact damage ...............................70 Replacing fuse ................................70
Table of contents
Starter will not operate .................... 71 Emergency starting engine ............. 71
Treatment of submerged motor..... 73
Consumer information.................... 74
Important warranty information for U.S.A. and Canada ..................... 74
YAMAHA MOTOR CORPORATION, U.S.A. OUTBOARD MOTOR TWO YEAR LIMITED WARRANTY ...... 76
IMPORTANT WARRANTY INFORMATION IF YOU USE YOUR YAMAHA OUTSIDE THE USA OR CANADA ...................... 79
1
Safety information
EMU33622
Outboard motor safety
Observe these precautions at all times.
EMU36500
Propeller
People can be injured or killed if they come in contact with the propeller. The propeller can keep moving even when the motor is in neutral, and sharp edges of the propeller can cut even when stationary.
Shut off the engine when a person is in the water near you.
Keep people out of reach of the propeller, even when the engine is off.
EMU33630
Rotating parts
Hands, feet, hair, jewelry, clothing, PFD straps, etc. can become entangled with inter- nal rotating parts of the engine, resulting in serious injury or death. Keep the top cowling in place whenever pos- sible. Do not remove or replace the cowling with the engine running. Only operate the engine with the cowling re- moved according to the specific instructions in the manual. Keep hands, feet, hair, jewel- ry, clothing, PFD straps, etc. away from any exposed moving parts.
EMU33640
Hot parts
During and after operation, engine parts are hot enough to cause burns. Avoid touching any parts under the top cowling until the en- gine has cooled.
EMU33650
Electric shock
Do not touch any electrical parts while start- ing or operating the engine. They can cause shock or electrocution.
EMU33671
Engine shut-off cord (lanyard)
Attach the engine shut-off cord so that the
engine stops if the operator falls overboard or leaves the helm. This prevents the boat from running away under power and leaving people stranded, or running over people or objects. Always attach the engine shut-off cord to a secure place on your clothing or your arm or leg while operating. Do not remove it to leave the helm while the boat is moving. Do not at- tach the cord to clothing that could tear loose, or route the cord where it could be- come entangled, preventing it from function- ing. Do not route the cord where it is likely to be accidentally pulled out. If the cord is pulled during operation, the engine will shut off and you will lose most steering control. The boat could slow rapidly, throwing people and ob- jects forward.
EMU33810
Gasoline
Gasoline and its vapors are highly flam- mable and explosive.
Always, refuel ac- cording to the procedure on page 35 to reduce the risk of fire and explosion.
EMU33820
Gasoline exposure and spills
Take care not to spill gasoline. If gasoline spills, wipe it up immediately with dry rags. Dispose of rags properly. If any gasoline spills onto your skin, immedi- ately wash with soap and water. Change clothing if gasoline spills on it. If you swallow gasoline, inhale a lot of gaso- line vapor, or get gasoline in your eyes, get immediate medical attention. Never siphon fuel by mouth.
EMU33900
Carbon monoxide
This product emits exhaust gases which contain carbon monoxide, a colorless, odor- less gas which may cause brain damage or
Safety information
2
death when inhaled. Symptoms include nau- sea, dizziness, and drowsiness. Keep cock- pit and cabin areas well ventilated. Avoid blocking exhaust outlets.
EMU33780
Modifications
Do not attempt to modify this outboard mo- tor. Modifications to your outboard motor may reduce safety and reliability, and render the outboard unsafe or illegal to use.
EMU33740
Boating safety
This section includes a few of the many im- portant safety precautions that you should follow when boating.
EMU33710
Alcohol and drugs
Never operate after drinking alcohol or tak- ing drugs. Intoxication is one of the most common factors contributing to boating fatal- ities.
EMU33720
Personal flotation devices
Have an approved personal flotation device (PFD) on board for every occupant. Yamaha recommends that you must wear a PFD whenever boating. At a minimum, children and non-swimmers should always wear PFDs, and everyone should wear PFDs when there are potentially hazardous boat- ing conditions.
EMU33730
People in the water
Always watch carefully for people in the wa- ter, such as swimmers, skiers, or divers, whenever the engine is running. When someone is in the water near the boat, shift into neutral and shut off the motor. Stay away from swimming areas. Swimmers can be hard to see. The propeller can keep moving even when the motor is in neutral. Shut off the engine
when a person is in the water near you.
EMU33750
Passengers
Consult your boat manufacturers instruc- tions for details about appropriate passenger locations in your boat and be sure all pas- sengers are positioned properly before ac- celerating and when operating above an idle speed. Standing or sitting in non-designated locations may result in being thrown either overboard or within the boat due to waves, wakes, or sudden changes in speed or direc- tion. Even when people are positioned prop- erly, alert your passengers if you must make any unusual maneuver. Always avoid jump- ing waves or wakes.
EMU33760
Overloading
Do not overload the boat. Consult the boat capacity plate or boat manufacturer for max- imum weight and number of passengers. Be sure that weight is properly distributed ac- cording to the boat manufacturers instruc- tions. Overloading or incorrect weight distribution can compromise the boats han- dling and lead to an accident, capsizing or swamping.
EMU33771
Avoid collisions
Scan constantly
for people, objects, and other boats. Be alert for conditions that limit your visibility or block your vision of others.
ZMU06025
Safety information
3
Operate defensively
at safe speeds and keep a safe distance away from people, ob- jects, and other boats.
Do not follow directly behind other boats or waterskiers.
Avoid sharp turns or other maneuvers that make it hard for others to avoid you or un- derstand where you are going.
Avoid areas with submerged objects or shallow water.
Ride within your limits and avoid aggres- sive maneuvers to reduce the risk of loss of control, ejection, and collision.
Take early action
to avoid collisions. Re- member,
boats do not have brakes
, and stopping the engine or reducing throttle can reduce the ability to steer. If you are not sure that you can stop in time before hitting an obstacle, apply throttle and turn in another direction.
EMU33790
Weather
Stay informed about the weather. Check weather forecasts before boating. Avoid boating in hazardous weather.
EMU33800
Accident reporting
Boat operators are required by law to file a Boating Accident Report with their state boating law enforcement agency if their boat is involved in any of the following accidents: 1. There is loss of life or probable loss of
life. 2. There is personal injury that requires
medical attention beyond first aid. 3. There is property damage to boats or
other property over a certain amount. 4. There is complete loss of a boat. Contact local law enforcement personnel if a report is necessary.
EMU33870
Boat education and training
Operators should take a boating safety course. This may be required in your state. Many of the organizations listed in the next section can provide information about cours- es in your area. You may also want to consider an Internet- based program for basic boater education. The Online Boating Safety Course provided by the BoatU.S. Foundation, is approved by the National Association of State Boating Law Administrators (NASBLA) and recog- nized by the United States Coast Guard. Most, but not all, states accept this course to meet their minimum requirements. While it cannot replace an in-depth course such as one offered by the U.S. Coast Guard, U.S. Power Squadron, or other organization, this online course does provide a general over- view of the basics in boating safety, require- ments, navigation, and operation. Upon successful completion of the course, the user can download a certificate of comple- tion immediately or, for a small charge, re- quest one by mail. To take this free course, go to boatus.org.
EMU33880
Passenger training
Make sure at least one other passenger is trained to operate the boat in the event of an emergency.
EMU33890
Boating safety publications
Be informed about boating safety. Additional publications and information can be obtained from many boating organizations.
EMU33590
Laws and regulations
Know the marine laws and regulations where you will be boating- and obey them. Several sets of rules prevail according to geographic
Safety information
4
location, but all are basically the same as the International Rules of the Road. The rules presented in the following section are con- densed- and have been provided for your convenience only. Contact the U.S. Coast Guard, the National Association of State Boating Law Adminis- trators, or your local Power Squadron for a complete set of rules governing the waters in which you will be using your boat.
EMU33680
Boating organizations
The following organizations provide boating safety training and information about boating safety and laws.
United States Coast Guard
Consumer Affairs Staff (G-BC) Office of Boating, Public, and Consumer Af- fairs U.S. Coast Guard Headquarters Washington, D.C. 20593-0001 Boating Safety Hotline: 1-800-368-5647 www.uscgboating.org
United States Power Squadrons
1-888-FOR-USPS (1-888-367-8777) www.usps.org
Boat Owners Association of The United States
1-800-336-BOAT (1-800-336-2628) www.boatus.com
National Association of State Boating Law Administrators (NASBLA)
1500 Leestown Road, Suite 330 Lexington, KY 4051 859-225-9497 859-225-9497 www.nasbla.org
National Marine Manufacturers Associa- tion (NMMA)
200 East Randolph Drive Suite 5100 Chicago, IL 606001 www.nmma.org
Marine Retailers Association of America
155 N. Michigan Ave. Chicago, IL 60601 www.mraa.com
EMU33690
Basic boating rules (Rules of the road)
Just as there are rules that apply when you are driving on streets and highways, there are waterway rules that apply when you are driving your boat. These rules are used inter- nationally. (For USA: and are also enforced by the United States Coast Guard and local agencies.) You should be aware of these rules, and follow them whenever you en- counter another vessel on the water.
EMU33700
Steering and sailing rules and sound signals
Whenever two vessels on the water meet one another, one vessel has the right-of- way; it is called the stand-on vessel. The vessel that does not have the right-of-way is called the give-way or burdenedvessel. These rules determine which vessel has the right-of-way, and what each vessel should do.
Stand-on vessel
The vessel with the right-of-way has the duty to continue its course and speed, except to avoid an immediate collision. When you maintain your direction and speed, the other
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5
vessel will be able to determine how best to avoid you.
Give-way vessel
The vessel that does not have the right-of- way has the duty to take positive and timely action to stay out of the way of the Stand-On vessel. Normally, you should not cross in front of the vessel with the right-of-way. You should slow down or change directions brief- ly and pass behind the other vessel. You should always move in such a way that the operator of the other vessel can see what you are doing.
The general prudential rule
This rule is called Rule 2 in the International Rules and says, In obeying and construing these rules due regard shall be had to all dangers of naviga- tion and collision, and to any special circum- stances, which may render a departure from the above rules necessary in order to avoid immediate danger. In other words, follow the standard rules ex- cept when a collision will occur unless both vessels try to avoid each other. If that is the case, both vessels become Give-Way vessels.
EMU25521
Rules when encountering vessels
There are three main situations that you may encounter with other vessels which could lead to a collision unless the Steering Rules are followed:
Meeting:
(you are approaching another ves- sel head-on)
Crossing:
(you are traveling across the oth- er vessels path)
Overtaking:
(you are passing or being passed by another vessel) In the following illustration, your boat is in the center. You should give the right-of-way to
any vessels shown in white area (you are the Give-Way vessel). Any vessels in the shad- ed area must yield to you (they are the Give- Way vessels). Both you and the meeting vessel must alter course to avoid each other.
Meeting
If you are meeting another power vessel head on, and are close enough to run the risk of collision, neither of you has the right-of- way Both of you should alter course to avoid an accident. You should keep the other ves- sel on your port (left) side. This rule doesnt apply if both of you will clear one another if you continue on your set course and speed.
Crossing
When two power driven vessels are crossing each others path close enough to run the risk of collision, the vessel which has the oth- er on the starboard (right) side must keep out of the way of the other. If the other vessel is on your right, you must keep out of its way;
Safety information
6
you are the Give-Way vessel. If the other vessel is on your port (left) side, remember that you should maintain course and direc- tion, provided the other vessel gives you the right-of-way as it should.
Overtaking
If you are passing another vessel, you are the Give-Way vessel. This means that the other vessel is expected to maintain its course and speed. You must stay out of its way until you are clear of it. Likewise, if an- other vessel is passing you, you should maintain your speed and direction so that the other vessel can steer itself around you.
EMU25531
Other special situations
There are three other rules you should be aware of when driving your boat around oth- er vessels.
Narrow channels and bends
When navigating in narrow channels, you should keep to the right when it is safe and practical to do so. If the operator of a power- driven vessel is preparing to go around a bend that may obstruct the view of other wa- ter vessels, the operator should sound a pro- longed blast on the whistle (4 to 6 seconds). If another vessel is around the bend, it too should sound the whistle. Even if no reply is heard, however, the vessel should still pro- ceed around the bend with caution. If you
navigate such waters with your boat, you will need to carry a portable air horn, available from local marine supply stores.
Fishing vessel right-of-way
All vessels that are fishing with nets, lines or trawls are considered to be fishing vessels under the International Rules. Vessels with trolling lines are not considered fishing ves- sels. Fishing vessels have the right-of-way regardless of position. Fishing vessels can- not, however, impede the passage of other vessels in narrow channels.
Sailing vessel right-of-way
Sailing vessels should normally be given the right-of-way. The exceptions to this are: 1. When the sailing vessel is overtaking
the power-driven vessel, the power-driv- en vessel has the right-of-way.
2. Sailing vessels should keep clear of any fishing vessel.
3. In a narrow channel, a sailing vessel should not hamper the safe passage of a power-driven vessel that can navigate only in such a channel.
Reading buoys and other markers
The waters of the United States are marked for safe navigation by the lateral system of buoyage. Simply put, buoys and markers have an arrangement of shapes, colors, numbers and lights to show which side of the buoy a boater should pass on when navigat- ing in a particular direction. The markings on these buoys are oriented from the perspec- tive of being entered from seaward (the boat- er is going towards the port). This means that red buoys are passed on the starboard (right) side when proceeding from open wa- ter into port, and black buoys are to port (left) side. When navigating out of port, your posi- tion with respect to the buoys should be re- versed; red buoys should be to port and
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7
black buoys to starboard. Many bodies of water used by boaters are entirely within the boundaries of a particular state. The Uniform State Waterway Marking System has been devised for these waters. This system uses buoys and signs with dis- tinctive shapes and colors to show regulato- ry or advisory information. These markers are white with black letters and orange boarders. They signify speed zones, restrict- ed areas, danger areas, and general infor- mation. Remember, markings may vary by geo- graphic location. Always consult local boat- ing authorities before driving your boat in unfamiliar waters.
Safety information
8
ZMU01708
9
General information
EMU25171
Identification numbers record
EMU25183
Outboard motor serial number
The outboard motor serial number is stamped on the label attached to the port side of the clamp bracket. Record your outboard motor serial number in the spaces provided to assist you in ordering spare parts from your Yamaha dealer or for reference in case your outboard motor is sto- len.
EMU25190
Key number
If a main key switch is equipped with the mo- tor, the key identification number is stamped on your key as shown in the illustration. Record this number in the space provided for reference in case you need a new key.
1. Outboard motor serial number location
1. Key number
General information
10
EMU33520
Read manuals and labels
Before operating or working on this motor:
Read this manual.
Read any manuals supplied with the boat.
Read all labels on the outboard motor and the boat. If you need any additional information, contact your Yamaha dealer.
EMU33831
Warning labels
If these labels are damaged or missing, contact your Yamaha dealer for replacements.
ZMU06146
1
2
3
General information
11
1 2
3
ZMU05670
General information
12
EMU33843
Symbols
The following symbols mean as follows.
Notice/Warning
Read Owners Manual
Hazard caused by continuous rotation
Electrical hazard
Remote control lever/gear shift lever operat- ing direction, dual direction
Engine start/ Engine cranking
ZMU05696
ZMU05664
ZMU05665
ZMU05666
ZMU05667
ZMU05668
13
Specifications and requirements
EMU31480
Specifications TIP:
(AL) stated in the specification data below represents the numerical value for the alumi- num propeller installed. Likewise, (SUS) represents the value for stainless steel propeller installed and (PL) for plastic propeller installed.
EMU2821C
Dimension:
Overall length: 25EH 936 mm (36.9 in) 25ER 615 mm (24.2 in) 25MH 936 mm (36.9 in)
Overall width: 25EH 358 mm (14.1 in) 25ER 304 mm (12.0 in) 25MH 358 mm (14.1 in)
Overall height S: 1068 mm (42.0 in)
Overall height L: 1195 mm (47.0 in)
Transom height S: 419 mm (16.5 in)
Transom height L: 546 mm (21.5 in)
Weight (AL) S: 25EH 50.5 kg (111 lb) 25ER 49.5 kg (109 lb) 25MH 48.0 kg (106 lb)
Weight (AL) L: 25EH 52.0 kg (115 lb) 25ER 51.0 kg (112 lb) 25MH 49.5 kg (109 lb)
Performance:
Full throttle operating range: 50006000 r/min
Maximum output: 18.4 kW@5500 r/min
(25 HP@5500 r/min) Idling speed (in neutral):
750
50 r/min
Engine:
Type: 2-stroke L
Displacement: 395.0 cm
3
Bore
stroke: 67.0
56.0 mm (2.64
2.20 in) Ignition system:
CDI Spark plug (NGK):
B7HS-10 Spark plug gap:
0.91.0 mm (0.0350.039 in) Control system:
25EH Tiller 25ER Remote control 25MH Tiller
Starting system: 25EH Manual and electric 25ER Manual and electric 25MH Manual
Starting carburetion system: Choke valve
Min. cold cranking amps (CCA/SAE): 25EH 245.0 A 25ER 245.0 A
Min. marine cranking amps (MCA/ABYC): 25EH 323.0 A 25ER 323.0 A
Min. reserve capacity (RC/SAE): 25EH 52 minutes 25ER 52 minutes
Alternator output: 25MH 80 W
Maximum generator output: 25EH 6.0 A 25ER 6.0 A
Specifications and requirements
14
Drive unit:
Gear positions: Forward-neutral-reverse
Gear ratio: 2.08 (27/13)
Trim and tilt system: Manual tilt
Propeller mark: F
Fuel and oil:
Recommended fuel: Regular unleaded gasoline
Min. pump octane: 86
Fuel tank capacity: 25 L (6.60 US gal, 5.50 Imp.gal)
Recommended engine oil: YAMALUBE 2-stroke outboard motor oil
Fuel:oil ratio:
Regular gasoline: 100 :1
Lubrication: Pre-mixed fuel and oil
Recommended gear oil: Hypoid gear oil SAE#90
Gear oil quantity: 0.370 L (0.391 US qt, 0.326 Imp.qt)
Tightening torque for engine:
Spark plug: 25.0 Nm (2.55 kgf-m, 18.4 ft-lb)
Propeller nut: 35.0 Nm (3.57 kgf-m, 25.8 ft-lb)
EMU33553
Installation requirements
EMU33563
Boat horsepower rating
WARNING
EWM01560
Overpowering a boat can cause severe
instability.
Before installing the outboard motor(s), con- firm that the total horsepower of your mo- tor(s) does not exceed the boats maximum horsepower rating. See the boats capacity plate or contact the manufacturer.
EMU33571
Mounting motor
WARNING
EWM01570
Improper mounting of the outboard mo- tor could result in hazardous condi- tions such as poor handling, loss of control, or fire hazards.
Because the motor is very heavy, spe- cial equipment and training is required
to mount it safely.
Your dealer or other person experienced in proper rigging should mount the motor using correct equipment and complete rigging in- structions. For further information, see page 28.
EMU33581
Remote control requirements
WARNING
EWM01580
If the engine starts in gear, the boat can move suddenly and unexpectedly, pos- sibly causing a collision or throwing passengers overboard.
If the engine ever starts in gear, the start-in-gear protection device is not working correctly and you should dis- continue using the outboard. Contact
your Yamaha dealer.
The remote control unit must be equipped with a start-in-gear protection device(s). This device prevents the engine from starting un- less it is in neutral.
Specifications and requirements
15
EMU25694
Battery requirements
EMU25713
Specifications of Battery
Use a fully charged battery that meets the following specifications. The engine cannot be started if battery voltage is too low.
NOTICE
ECM01061
Do not use a battery that does not meet the specified capacity. If a battery that does not meet specifications is used, the electric system could perform poorly or be overloaded, causing electric system
damage.
EMU36290
Mounting battery
Mount the battery holder securely in a dry, well-ventilated, vibration-free location in the boat.
WARNING! Do not put flammable items, or loose heavy or metal objects in the same compartment as the battery. Fire, explosion or sparks could result.
[EWM01820]
EMU36300
Multiple batteries
To connect multiple batteries, such as for multiple engine configurations or for an ac- cessory battery, consult your Yamaha dealer
about battery selection and correct wiring.
EMU25730
Without a rectifier or Rectifier Regulator
NOTICE
ECM01090
A battery cannot be connected to models that do not have a rectifier or Rectifier
Regulator.
If you wish to use a battery with the models without a rectifier or Rectifier Regulator, in- stall an optional Rectifier Regulator. Using a maintenance-free battery with the above models can shorten the life of the bat- tery significantly. Install an optional Rectifier Regulator or use accessories rated to withstand 18 volts or higher with the above models. Consult your Yamaha dealer for details on installing an optional Rectifier Regulator.
EMU34191
Propeller selection
Next to selecting an outboard, choosing the right propeller is one of the most important purchasing decisions a boater can make. The type, size, and design of your propeller have a direct impact on acceleration, top speed, fuel economy, and even engine life. Yamaha designs and manufactures propel- lers for every Yamaha outboard motor and every application. Your outboard motor came with a Yamaha propeller chosen to perform well over a range of applications, but there may be uses where a different propeller would be more appropriate. Your Yamaha dealer can help you select the right propeller for your boating needs. Select a propeller that will allow the engine to reach the middle or upper half of the operating range at full throttle with the maximum boat-
Minimum cold cranking amps (CCA/ SAE):
25EH 245.0 A 25ER 245.0 A
Minimum marine cranking amps (MCA/ ABYC):
25EH 323.0 A 25ER 323.0 A
Minimum reserve capacity (RC/SAE): 25EH 52 minutes 25ER 52 minutes
Specifications and requirements
16
load. Generally, chose a larger pitch propel- ler for a smaller operating load and a smaller pitch propeller for a heavier load. If you carry loads that vary widely, chose the propeller that lets the engine run in the proper range for your maximum load but remember that you may need to reduce your throttle setting to stay within the recommended engine speed range when carrying lighter loads. For instructions on propeller removal and in- stallation, see page 61.
EMU25770
Start-in-gear protection
Yamaha outboard motors or Yamaha-ap- proved remote control units are equipped with start-in-gear protection device(s). This feature permits the engine to be started only when it is in neutral. Always select neutral before starting the engine.
EMU25651
Engine oil requirements
If the recommended engine oil is not avail- able, another 2-stroke engine oil with an NMMA-certified TC-W3 rating may be used.
EMU36360
Fuel requirements
EMU36780
Gasoline
Use a good quality gasoline that meets the minimum octane rating. If knocking or ping- ing occurs, use a different brand of gasoline or premium unleaded fuel. Yamaha re- comends that you use alcohol-free (see Gasohol) gasoline whenever possible.
NOTICE
ECM01980
Do not use leaded gasoline. Leaded gasoline can seriously damage the en- gine.
Avoid getting water and contaminants in the fuel tank. Contaminated fuel can cause poor performance or engine damage. Use only fresh gasoline that
1. Propeller diameter in inches 2. Propeller pitch in inches 3. Type of propeller (propeller mark)
1. Propeller diameter in inches 2. Propeller pitch in inches 3. Type of propeller (propeller mark)
ZMU04605
-x 1 2 3
ZMU04607
-x 1 2 3
Recommended engine oil: YAMALUBE 2-stroke outboard motor oil
Recommended gasoline: Regular unleaded gasoline with a min- imum Octane rating of 86 (Pump Oc- tane Number) = (R+M)/2
Specifications and requirements
17
has been stored in clean containers.
Gasohol
There are two types of gasohol: gasohol con- taining ethanol (E10) and that containing methanol. Ethanol can be used if the ethanol content does not exceed 10% and the fuel meets the minimum octane ratings. E85 is a fuel containing 85% ethanol and must not be used in your outboard motor. All ethanol blends containing more than 10% ethanol can cause fuel system damage or cause en- gine starting and running problems. Yamaha does not recommend gasohol containing methanol because it can cause fuel system damage or engine performance problems. It is recommended that you install a water- separating marine fuel filter assembly (10 micron minimum) between your boats fuel tank and outboard motor when using etha- nol. Ethanol is known to allow moisture to be absorbed into boat fuel tanks and systems. Moisture in the fuel can cause corrosion of metallic fuel system components, starting and running complaints and require addition- al fuel system maintenance.
EMU27270
Ring Free Fuel Additive
Gasoline is a precise blend of many different substances, each chosen to give certain characteristics. Gasoline blends have been changing in recent years in response to con- cerns about pollution and resulting emis- sions regulations. One of the most obvious changes has been the elimination of lead from most fuels. As gasoline has changed, the amount of ad- ditives such as aromatics and oxygenates has increased. These additives are impor- tant for the engines in passenger cars, but they can have detrimental effects in marine engines, because of increased deposits in
the combustion chamber. When enough de- posits collect, piston rings begin sticking. Performance drops and engine wear in- creases dramatically. While many additives available may reduce deposits, Yamaha recommends the use of
Ring Free Fuel Additive
, available from your Yamaha dealer.
Ring Free Fuel Addi- tive
has repeatedly proven its ability to clean combustion deposits from inside the engine, notably the critical piston-ring-land area, and fuel system components. Follow product la- beling for use instructions.
EMU36880
Muddy or acidic water
Yamaha strongly recommends that you have your dealer install the optional chromium- plated water pump kit if you use the outboard motor in muddy or acidic water conditions. However, depending on the model it might not be required.
EMU36330
Anti-fouling paint
A clean hull improves boat performance. The boat bottom should be kept as clean of ma- rine growth as possible. If necessary, the boat bottom can be coated with an anti-foul- ing paint approved for your area to inhibit marine growth. Do not use anti-fouling paint which includes copper or graphite. These paints can cause more rapid engine corrosion.
Specifications and requirements
18
EMU36340
Motor disposal requirements
Never illegally discard (dump) the motor Yamaha recommends consulting the dealer about discarding the motor.
EMU36351
Emergency equipment
Keep the following items onboard in case there is trouble with the motor.
A tool kit with assorted screwdrivers, pli- ers, wrenches (including metric sizes), and electrical tape.
Waterproof flashlight with extra batteries.
An extra engine shut-off cord (lanyard) with clip.
Spare parts, such as an extra set of spark plugs.
Consult your Yamaha dealer for details.
EMU25221
Emission control information
EMU25230
North American models
This engine conforms to U.S. Environmental Protection Agency (EPA) regulations for ma- rine SI engines. See the label affixed to your engine for details.
EMU30390
Approval label of emission control certif- icate
This label is attac