Yamaha YP20T, YP30T, YP40T v2 Owner's Manual
en
Water Pump
LIT-19626-02-49 9C9-28199-13
PRINTED IN JAPAN 2016.110.21 !
(E)
YP20T YP30T YP40T
OWNERS MANUAL
Read this manual carefully before operating this machine.
PRINTED ON RECYCLED PAPER 012226403
Read this manual carefully before operating this machine. This manual should stay with this machine if it is sold.
INTRODUCTION Congratulations on your purchase of your new Yamaha. This manual will provide you with a good basic understanding of the operation and maintenance of this machine. If you have any questions regarding the operation or maintenance of your machine, please consult a Yamaha dealer.
YP20T, YP30T, YP40T OWNERS MANUAL
2016 by Yamaha Motor Corporation, U.S.A. 1st Edition, October 2016
All rights reserved. Any reprinting or unauthorized use without the written permission of Yamaha Motor Corporation, U.S.A.
is expressly prohibited. Printed in Japan
P/N LIT-19626-02-49
IMPORTANT MANUAL INFORMATION
Particularly important information is distin- guished in this manual by the following notations.
This is the safety alert symbol. It is used to alert you to potential personal injury hazards. Obey all safety messag- es that follow this symbol to avoid pos- sible injury or death.
WARNING
A WARNING indicates a hazardous sit- uation which, if not avoided, could result in death or serious injury.
NOTICE
A NOTICE indicates special precau- tions that must be taken to avoid dam- age to the machine or other property.
TIP A TIP provides key information to make procedures easier or clearer.
WARNING
PLEASE READ AND UNDERSTAND THIS MANUAL COMPLETELY BEFORE OPERATING THE MACHINE.
TIP 9 Yamaha continually seeks advance-
ments in product design and quality. Therefore, while this manual contains the most current product information available at the time of printing, there may be minor discrepancies between your machine and this manual. If there is any question concerning this manual, please consult a Yamaha dealer.
9 This manual should be considered a permanent part of this machine and should remain with this machine when resold.
* Product and specifications are subject to change without notice.
SAFETY INFORMATION ...................... 1 Exhaust fumes are poisonous ............ 1 Fuel is highly flammable and poisonous ........................................... 1 Engine and muffler may be hot .......... 1
LOCATION OF IMPORTANT LABELS ................................................ 3 DESCRIPTION ...................................... 4 CONTROL FUNCTION ......................... 5
Oil warning light (Red)........................ 5 Engine switch ..................................... 5 Throttle lever ...................................... 5 Fuel cock lever ................................... 6 Choke lever ........................................ 6 Recoil starter ...................................... 6
PREPARATION ..................................... 7 Fuel .................................................... 7 Engine oil ........................................... 8 Water hose installation ....................... 9 Water priming ................................... 10
PRE-OPERATION CHECK ................. 11 Pre-operation check ......................... 11
OPERATION ....................................... 12 Preparation for operation.................. 12 Water priming ................................... 12 Starting the engine ........................... 13 Stopping the engine ......................... 14 Drain water after use ........................ 15 High altitude operation .................... 15
PERIODIC MAINTENANCE ................ 16 Maintenance chart ........................... 16 Spark plug inspection ....................... 17 Carburetor adjustment ..................... 18 Water leakage check ........................ 18 Engine oil replacement ..................... 18 Air filter ............................................. 20 Fuel cock .......................................... 21 Fuel tank filter ................................... 22 Muffler screen and spark arrester .... 22 Troubleshooting ................................ 24
STORAGE ........................................... 27 Drain the fuel .................................... 27 Engine .............................................. 29
SPECIFICATIONS ............................... 30 Dimensions ...................................... 30 Engine .............................................. 30 Pump ................................................ 30
CONSUMER INFORMATION.............. 31 Identification number records ........... 31 Machine identification ....................... 31
EXHAUST EMISSION CONTROL SYSTEM AND COMPONENTS .......... 32 WIRING DIAGRAM ............................. 33
CONTENTS
1
SAFETY INFORMATION
Exhaust fumes are poisonous 9 Using a water pump indoors CAN KILL YOU IN
MINUTES. Engine exhaust contains carbon mon- oxide. This is a poison you cannot see or smell.
9 NEVER use inside a home or garage, EVEN IF doors and windows are open.
9 Only use OUTSIDE and far away from windows, doors, and vents.
Fuel is highly flammable and poisonous 9 Always turn off the engine when refuelling. 9 Never refuel while smoking or in the vicinity of an
open flame. 9 Take care not to spill any fuel on the engine or
muffler when refuelling. 9 Do not leave the water pump inside the vehicle or
in the trunk. 9 If you swallow any fuel, inhale fuel vapor, or allow
any to get in your eye(s), see your doctor immedi- ately. If any fuel spills on your skin or clothing, immediately wash with soap and water and change your clothes.
9 When operating or transporting the water pump, be sure it is kept upright. If it tilts, fuel may leak from the carburetor or fuel tank.
9 Do not place any flammable materials near the exhaust outlet during operation.
Engine and muffler may be hot 9 Place the water pump in a place where pedestri-
ans or children are not likely to touch the water pump.
745-013
745-014
745-016
745-015
745-017
745-018
2
9 In order to prevent overheating, ensure adequate airflow by keeping the machine at least 1 m (3 ft) from objects or other equipment.
745-019a
745-020
9 Do not operate the engine with a dust cover or other objects covering it.
9 When covering the water pump, be sure to do so only after the engine and muffler have completely cooled down.
3
LOCATION OF IMPORTANT LABELS Please read the following labels carefully before oper- ating this water pump. TIP Maintain or replace safety and instruction labels, as necessary.
1
2
1
2
4
DESCRIPTION
1 Air filter case cover 2 Choke lever 3 Fuel cock 4 Fuel tank cap 5 Fuel tank 6 Muffler 7 Priming plug 8 Engine switch 9 Oil filler cap 0 Oil drain bolt q Oil warning light w Recoil starter e Throttle lever r Spark plug t Water drain plug y Carrying handle
1 2 3 4 5 6 7
890qwe
ry
t
5
Engine switch The engine switch controls the ignition system.
1 ON Ignition circuit is switched on. The engine can be started.
2 OFF Ignition circuit is switched off. The engine will not run.
Throttle lever The throttle lever controls the engine speed. Move the throttle lever in direction 2 to increase engine speed. Move the throttle lever in direction 1 to decrease engine speed.
a Throttle lever
NOTICE
Always check throttle operation before starting the engine.
1
2
1 2
a
CONTROL FUNCTION Oil warning light (Red) When the oil level falls below the lower level, the oil warning light comes on and then the engine stops automatically. Unless you refill with oil, the engine will not start again.
TIP If the engine stalls or does not start, turn the engine switch to ON and then pull the recoil starter. If the oil warning light flickers for a few seconds, the engine oil is insufficient. Add oil and restart.
6
Recoil starter The recoil starter is used to start the engine. Pull the recoil starter slowly until it is engaged, then pull it briskly.
1 Recoil starter handle
NOTICE
9 Pull the recoil starter handle straight. 9 Return the recoil starter handle slowly. 9 Do not touch the recoil starter handle while the
water pump is operating.
704-010
1
1
2
Fuel cock lever The fuel cock supplies fuel from the fuel tank to the carburetor. The fuel cock has two positions.
1 ON With the lever in this position, fuel flows to the carbure- tor. Normal using is done with the lever in this position.
2 OFF With the lever in this position, fuel will not flow. Always turn the lever to this position when the engine is not running.
1 Choke lever Starting a cold engine requires a richer air-fuel mix- ture, which is supplied by the choke lever.
1 Choke lever
7
707-041
1 2
707-037
PREPARATION Fuel
WARNING 9 Fuel is highly flammable and poisonous.
Check SAFETY INFORMATION (See page 1) carefully before filling.
9 Do not overfill the fuel tank, otherwise it may overflow when the fuel warms up and expands.
9 Wipe up any spilled fuel immediately. 9 After fill the fuel, make sure the fuel tank cap is
tightened securely.
1. Stop the engine. 2. Place the water pump on a level surface. 3. Remove the fuel tank cap. 4. Check the fuel level. 5. If low, fill the tank with fuel.
NOTICE
9 Immediately wipe off spilled fuel with a clean, dry, soft cloth, since fuel may deteriorate paint- ed surfaces or plastic parts.
9 Use only unleaded gasoline. The use of leaded gasoline will cause severe damage to internal engine parts.
Make sure there is sufficient fuel in the tank. When refueling, be sure to fill the tank up to the bot- tom edge of the fuel tank filler.
1 Fuel level 2 Fuel tank filler
Your Yamaha engine has been designed to use regular unleaded gasoline with a pump octane number ((R + M)/2) of 86 or higher, or research octane number of 91 or higher.
8
1
700-006
2
700-110
Recommended fuel: Unleaded gasoline Fuel tank capacity: Total: YP20T: 4.0 L (1.06 US gal, 0.88 Imp gal) YP30T: 5.5 L (1.45 US gal, 1.21 Imp gal) YP40T: 6.1 L (1.61 US gal, 1.34 Imp gal)
Engine oil
NOTICE
The water pump has been shipped without engine oil. Do not start the engine until you have filled it with the sufficient engine oil.
1. Place the water pump on a level surface.
2. Remove the oil filler cap.
1 Oil filler cap
3. Fill the specified amount of the recommended engine oil, and then install and tighten the oil filler cap.
2 Correct level
9
Recommended engine oil Recommended oil brand: YAMALUBE Available oil grade: API SE type or higher JASO MA or MB Available viscosity index: 10W-30 or 10W-40 Engine oil quantity: YP20T: 0.6 L (0.63 US qt, 0.53 Imp qt) YP30T: 1.0 L (1.06 US qt, 0.88 Imp qt) YP40T: 1.1 L (1.16 US qt, 0.97 Imp qt)
Water hose installation 1. Install the hose joint to the pump.
1 Hose joint
NOTICE
When installing the joint to the pump, be sure the gasket is in place.
2. Connect the hoses on the joints with clamp.
3. Connect the strainer on the inlet hose end.
2 Strainer
NOTICE
9 Be sure the hoses are installed securely or air leak will occur and water will not be drawn up.
9 Be sure the strainer is installed or pump dam- age may occur.
1
2
0 10 30 50 70 90 110 130 F
-20 -10 0 10 20 30 40 50 C
SAE 10W-40
SAE 10W-30
10
Water priming Make sure the water is at pump casing upper level. Add water as necessary.
1 Upper level
NOTICE
Be sure the pump is filled up with water before starting the engine or mechanical seal damage will occur.
TIP 9 Place the water pump on a secure, flat and level
surface as near to the water to be pumped as pos- sible.
9 The higher the water pump is from the water sur- face (more suction head), the longer it will take to prime and the lesser pump output (discharge head) will be.
1
NOTICE
Install the strainer 50 mm (2 in) suction port diameter for YP20T with filtering perforations 20 mm (0.78 in) or less in diameter.
11
PRE-OPERATION CHECK
WARNING If any item in the Pre-operation check is not work- ing properly, have it inspected and repaired before operating the water pump.
The condition of a water pump is the owners responsi- bility. Vital components can start to deteriorate quickly and unexpectedly, even if the water pump is unused.
TIP Pre-operation checks should be made each time the water pump is used.
Pre-operation check Fuel (See page 7) 9 Check fuel level in fuel tank. 9 Refuel if necessary.
Fuel line 9 Check fuel hose for crack or damage. 9 Replace if necessary.
Engine oil (See page 8) 9 Check oil level in engine. 9 If necessary, add recommended oil to specified
level. 9 Check water pump for oil leakage.
The point where abnormality was recognized by use 9 Check operation. 9 If necessary, consult a Yamaha dealer.
12
OPERATION
WARNING Never operate the water pump in a closed area or it may cause unconsciousness and death within a short time. Operate the engine in a well ventilated area.
NOTICE
The water pump has been shipped without engine oil. Do not start the engine until you have filled it with the sufficient engine oil.
Preparation for operation Choose the best location for the water pump to per- form the pumping job. Place the pump on a flat, level surface as near as possible to the water to be pumped. Connect the hoses properly (See page 9).
Pumping performance is affected by various factors including the length of the hoses and the vertical height from the water surface to the pump (suction head) and from the pump to the end of the discharge hose (discharge head). As the height of the pump from the water surface increases the time necessary to prime the pump will increase and the discharge from the pump will decrease. Do not exceed maximum Total head and Suction head specifications for your water pump (See page 30).
Water priming Before starting the engine, make sure water is at the pump casing upper level. Add clean water as necessary.
1 Upper level
NOTICE
Be sure the pump is filled up with water before starting the engine or mechanical seal damage will occur.
1
13
4. Move the throttle lever slightly to right.
705-0371
12
3
Starting the engine
NOTICE
Be sure the pump is filled up with water before starting the engine.
2. Turn the engine switch to the ON.
2 ON
3. Turn the choke lever to the 1.
3 Choke lever
TIP The choke is not required to start a warm engine. Turn the choke lever to the operating position.
1. Turn the fuel cock lever to the ON.
1 ON
14
704-010
4
6 5
5. Pull the recoil starter slowly until it is engaged, then pull it briskly.
WARNING Be careful to use the recoil starter. In rare cases, the recoil starter handle can be drawn back quickly by the engine kickback.
TIP Grasp the carrying handle firmly to prevent the water pump from falling over when pulling the recoil starter.
6. After the engine starts, warm up the engine until the engine does not stop when the choke lever is returned to the original position.
4 Original position
7. Set the throttle lever in desired position.
5 Increase engine speed 6 Decrease engine speed
Stopping the engine 1. Move the throttle lever fully to left.
1
2. Turn the engine switch to the OFF.
1 OFF
15
1
Drain water after use After use, open the drain plug to drain remaining water from the casing.
NOTICE
Unless the casing is drained before storage, the pump can be severely damaged by freezing water if temperatures drop to 0 C (32 F) or below.
1 Drain port
705-038
2
3. Turn the fuel cock lever to the OFF.
2 OFF
High altitude operation This engine may require a high altitude carburetor kit to ensure correct engine operation at altitudes above 4000 ft. (1219 meters). If you operate your engine at altitudes above 4000 ft. (1219 meters) consistently, have your local Yamaha dealer perform the necessary carburetor modification. This engine should be operat- ed in its original configuration below 4000 ft. (1219 meters) as damage may occur if high altitude carbure- tor kit is installed and operated below 4000 ft. (1219 meters).
16
PERIODIC MAINTENANCE Maintenance chart Regular maintenance is most important for best performance and safe operation.
WARNING
Stop the engine before starting maintenance work.
No. Item Remarks Pre-opera- tion check
(daily)
Initial Every
1 month or 20 Hr
3 month or 50 Hr
6 month or 100 Hr
12 month or 300 Hr
1. **Spark plug Check condition, adjust gap and clean. Replace if necessary.
7
2. Engine oil Check oil level. 7
Replace. 7 7
3. **Air filter Clean. Replace if necessary. 7
4. Fuel tank filter Clean fuel cock and fuel tank filter. Replace if necessary.
7
5.* **Valve clearance Check and adjust when engine is cold. 7
6. Fuel line Check fuel hose for cracks or damage. Replace if necessary.
7
7.* **Crankcase breather system
Check breather hose for cracks or damage. Replace if necessary.
7
8.* **Idle speed Check and adjust engine idle speed. 7
9. **Exhaust system
Check for leakage. Retighten or replace gasket if necessary.
7
Check muffler screen and spark arrester. Clean or replace if necessary.
7
10. **Choke lever Check choke operation. 7
11.* Cooling system Check fan damage. 7
12. Starting system Check recoil starter operation. 7
13.* **Decarbonization More frequently if necessary.
After every 500 Hrs.
14. Water pump Check for leakage. Retighten or replace O-ring and/or gasket.
7
15.* Fittings/Fasteners Check all fittings and fasteners. Correct if necessary.
7
* : It is recommended that these items be serviced by a Yamaha dealer. ** : Related to emission control system.
NOTICE
Use only Yamaha specified genuine parts for replacement. Ask an authorized Yamaha dealer for further attention.
17
760-005a
a
760-001a
Spark plug inspection The spark plug is an important engine component, which should be checked periodically.
1. Remove the spark plug cap and the spark plug.
2. Check for discoloration and remove the carbon. The porcelain insulator around the center elec-
trode of spark plug should be a medium-to-light tan color.
3. Check the spark plug type and gap.
Standard spark plug: BPR4ES (NGK) Spark plug gap: 0.70.8 mm (0.0280.031 in)
a Gap
TIP The spark plug gap should be measured with a wire thickness gauge and, if necessary, adjusted to specifi- cation.
4. Install the spark plug, and then tighten it.
Spark plug tightening torque: 20 Nm (2.0 kgfm, 14 lbft)
TIP If a torque wrench is not available when installing a spark plug, a good estimate of the correct torque is 1/41/2 turn past finger tight. However, the spark plug should be tightened to the specified torque as soon as possible.
5. Install the spark plug cap.
18
Carburetor adjustment The carburetor is a vital part of the engine. Adjusting should be left to a Yamaha dealer with the professional knowledge, specialized data, and equipment to do so properly.
Water leakage check Check for water leakage from water pump. Retighten the bolts, plugs, band, and hose joints. Replace O-rings and/or gaskets if necessary.
Engine oil replacement
WARNING
Avoid draining the engine oil immediately after stopping the engine. The oil is hot and should be handled with care to avoid burns.
1. Place the water pump on a level surface and warm up the engine for several minutes. Then stop the engine and turn the fuel cock lever to OFF.
2. Remove the oil filler cap.
1 Oil filler cap
3. Place an oil pan under the engine. Remove the oil drain bolt and the gasket so that the oil can be completely drained.
2 Oil drain bolt 3 Gasket 4 O-ring
4
2
3
1
19
4. Check the oil drain bolt, the oil filler cap and the O-ring. Replace them if damaged.
5. Install a new gasket and the oil drain bolt and then tighten the bolt.
Oil drain bolt tightening torque: 17 Nm (1.7 kgfm, 12 lbft)
5
700-110
6. Add engine oil to the correct level.
5 Correct level
Recommended engine oil Recommended oil brand: YAMALUBE Available oil grade: API SE type or higher JASO MA or MB Available viscosity index: 10W-30 or 10W-40 Engine oil quantity: YP20T: 0.6 L (0.63 US qt, 0.53 Imp qt) YP30T: 1.0 L (1.06 US qt, 0.88 Imp qt) YP40T: 1.1 L (1.16 US qt, 0.97 Imp qt)
NOTICE
Be sure no foreign material enters the crankcase.
7. Install the oil filler cap.
0 10 30 50 70 90 110 130 F
-20 -10 0 10 20 30 40 50 C
SAE 10W-40
SAE 10W-30
20
Air filter 1. Remove the screws, and then remove the air filter
case cover.
2. Remove the foam element.
1 Screw 2 Air filter case cover 3 Foam element
3. Wash the foam element in white kerosene and dry it.
WARNING
Never use white kerosene while smoking or in the vicinity of an open flame.
4. Oil the foam element and squeeze out excess oil. The foam element should be wet but not dripping.
Recommended oil: Foam-air-filter oil or engine oil (See page 19)
NOTICE
Do not wring out the foam element when squeez- ing it. This could cause it to tear.
5. Insert the foam element into the air filter case.
NOTICE
The engine should never run without the foam ele- ment; excessive piston and cylinder wear may result.
TIP Be sure the foam element sealing surface matches the air filter so there is no air leak.
6. Install the air filter case cover and tighten the screws.
710-037a
2 1
1
3
21
705-066
2
3
1
Fuel cock
WARNING
Never use the gasoline while smoking or in the vicinity of an open flame.
1. Stop the engine.
2. Turn the fuel cock lever to OFF.
3. Remove the fuel cock cup, the gasket and the fuel strainer.
4. Clean the cup and the fuel strainer with gasoline and wipe it off.
5. Check the gasket. Replace it if damaged.
6. Install the fuel strainer, the gasket and the fuel cock cup.
WARNING
Be sure the fuel cock cup is tightened securely.
1 Fuel cock cup 2 Gasket 3 Fuel strainer
22
2
1
Fuel tank filter
WARNING
Never use the gasoline while smoking or in the vicinity of an open flame.
1. Remove the fuel tank cap and the fuel tank filter.
1 Fuel tank cap 2 Fuel tank filter
2. Clean the fuel tank filter with gasoline. Replace it if damaged.
3. Wipe the fuel tank filter and insert it.
4. Install the fuel tank cap.
WARNING
Be sure the fuel tank cap is tightened securely.
Muffler screen and spark arrester
WARNING
The engine and muffler will be very hot after the engine has been run. Avoid touching the engine and muffler while they are still hot with any part of your body or clothing during inspection or repair.
1. Loosen the screw and then remove the muffler cap and the muffler screen.
1 Screw 2 Muffler cap 3 Muffler screen
2. Use a flathead screw driver to pry the spark arrester out from the muffler.
1
3
2
745-012
23
4
711-022
3. Remove the spark arrester.
4 Spark arrester
4. Remove the carbon deposits on the muffler screen and spark arrester using a wire brush.
NOTICE
When cleaning, use the wire brush lightly to avoid damaging or scratching of the muffler screen and spark arrester.
5. Check the muffler screen and spark arrester. Replace them if damaged.
56
6. Install the spark arrester. TIP Align the spark arrester projection with the hole in the muffler pipe.
5 Projection 6 Hole
7. Install the muffler screen and the muffler cap and then tighten the screw.
24
Troubleshooting
Engine wont start 1. Fuel systems No fuel supplied to combustion chamber. 2 No fuel in tank .... Supply fuel. 2 Fuel in tank .... Fuel cock lever to ON.
1 ON
2 Clogged fuel line .... Clean fuel line. 2 Foreign matter in fuel cock .... Clean fuel cock. 2 Clogged carburetor .... Clean carburetor.
2. Engine oil system Insufficient 2 Oil level is low .... Add engine oil.
3. Electrical systems 2 Engine switch to ON and pull the recoil starter.
2 ON
Poor spark 2 Spark plug dirty with carbon or wet .... Remove
carbon or wipe spark plug dry. 2 Faulty ignition system .... Consult a Yamaha deal-
er.
707-041
705-0371
700-006
12
760-009
704-010
25
4. Compression Insufficient 2 Worn out piston and cylinder .... Consult a Yamaha
dealer. 2 Loose cylinder head nuts .... Tighten nuts properly. 2 Damaged gasket .... Replace gasket.
Water does not draw up 2 Loosened priming and/or drain plugs .... Tighten. 2 Loosened hose joint and/or band .... Tighten. 2 Damaged O-ring and/or gaskets .... Replace. 2 Damaged mechanical seal .... Consult a Yamaha
dealer.
26
A ENGINE DOES NOT START
H Pull the recoil starter and check the spark plug for spark strength. (See WARNING)
WARNING 9 To prevent FIRE HAZARDS be
sure fuel is not present in the spark plug area.
9 To prevent FIRE HAZARDS be sure to place the spark plug as far way as possible from the spark plug hole and carburetor area.
9 To prevent ELECTRIC SHOCK do not hold spark plug lead with hand while testing.
I OK
J Does not spark.
B Turn the engine switch to ON, then pull the recoil starter and check if the oil warning light flickers.
C Does not flicker D Flickers
E Check engine oil level.
700-104 700-105
F OK G Level low Consult a Yamaha dealer. Add engine oil.
K Check the spark plug. 9 Type: BPR4ES (NGK) 9 Gap: 0.70.8 mm (0.0280.031 in)
L Incorrect M OK
Replace or adjust gap.
Clean the spark plug.
R Consult a Yamaha dealer.
N Check the following. 9 Fuel cock clogging 9 Air filter element clogging.
O Clogged
P OK
Q Clean or replace; If engine does not start, consult a Yamaha dealer.
27
STORAGE Long term storage of your machine will require some preventive procedures to guard against deterioration.
Drain the fuel 1. Turn the engine switch to OFF.
1 OFF
2. Remove the fuel tank cap and fuel tank filter. Extract the fuel from the fuel tank into an approved gasoline container using a commercially available hand siphon. Then, install the fuel tank filter and fuel tank cap.
WARNING Fuel is highly flammable and poisonous. Check SAFETY INFORMATION (See page 1) carefully.
NOTICE
Immediately wipe off spilled fuel with a clean, dry, soft cloth, since fuel may deteriorate painted sur- faces or plastic parts.
2
1
3. Turn the engine switch to ON.
2 ON
4. Turn the fuel cock lever to ON.
3 ON
3
28
NOTICE
Be sure the pump is filled up with water before starting the engine.
5. Start the engine and leave it run until it stops. The engine stops in approximately 20 minutes
time by running out of fuel. TIP Duration of the running engine depends on the amount of the fuel left in the tank.
6. Drain the fuel from the carburetor by loosening the drain screw on the carburetor float chamber.
4 Drain screw
7. Turn the engine switch to OFF.
8. Turn the fuel cock lever to OFF.
9. Tighten the drain screw.
10. Tighten further if any screws, bolts and nuts are loose.
4
29
Engine 1. Remove the spark plug, pour about one table-
spoon of engine oil (See page 19) into spark plug hole and reinstall the spark plug. Recoil start the engine by turning over several times (with ignition off) to coat the cylinder walls with oil.
2. Pull the recoil starter until you feel compression. Then stop pulling. (This prevents the cylinder and valves from rusting.)
3. Remove the water drain plug and drain the water. Reinstall the water drain plug after drained the water.
4. Clean exterior of the water pump and apply a rust inhibitor.
5. Store the water pump in a dry, well-ventilated place, with the cover placed over it.
6. The water pump must remain in a vertical position when stored, carried or operated.
30
SPECIFICATIONS Dimensions
Unit YP20T YP30T YP40T
Overall length mm (in) 665 (26.2) 685 (27.0) 765 (30.1) Overall width mm (in) 462 (18.2) 505 (19.9) 545 (21.5) Overall height mm (in) 516 (20.3) 555 (21.9) 625 (24.6) Dry weight kg (lb) 47.5 (104.7) 62.5 (137.8) 79.1 (174.4)
Engine Unit YP20T YP30T YP40T
Type Air cooled 4-stroke gasoline OHV Cylinder arrangement Inclined, 1 cylinder Displacement cm 171 296 357
Bore Stroke mm (in)
66.0 50.0 (2.60 1.97)
80.0 59.0 (3.15 2.32)
85.0 63.0 (3.35 2.48)
Rated output kW / r/min 3.5 / 3600 7.0 / 3600 7.6 / 3600 Fuel Unleaded gasoline Fuel tank capacity L (US gal, Imp gal) 4.0 (1.06, 0.88) 5.5 (1.45, 1.21) 6.1 (1.61, 1.34) Engine oil quantity L (US qt, Imp qt) 0.6 (0.63, 0.53) 1.0 (1.06, 0.88) 1.1 (1.16, 0.97) Ignition system TCI Spark plug: Type BPR4ES (NGK)
Gap mm (in) 0.70.8 (0.0280.031)
Pump Unit YP20T YP30T YP40T
Caliber mm (in) 50 (2) 80 (3) 100 (4)
Maximum capacity L/min (US gal/min, Imp gal/min)
700 (185, 154)
1350 (356, 297)
1700 (449, 374)
Total head m (ft) 28 (92) 24 (78) 27 (89) Suction head m (ft) 8 (26.2)
31
1
PRI-I.D. CODE SERIAL No.
MODEL
Identification number records Record your Primary I.D., and serial num- bers in the spaces provided, to assist you in ordering spare parts from a Yamaha dealer. Also record and keep these I.D. numbers in a separate place in case your machine is stolen.
Machine identification The machine serial number is stamped in the location as shown.
1 Machine serial number
TIP The first three digits of these numbers are for model identification; the remaining dig- its are the unit production number. Keep a record of these numbers for reference when ordering parts from a Yamaha deal- er.
PRI-I.D. NUMBER:
CONSUMER INFORMATION
32
EXHAUST EMISSION CONTROL SYSTEM AND COMPONENTS
Item Acronym 9 CARB. ASSY., LH. & JT., .......................CARB (Carburetor) CARBURETOR2 9 T.C.I. MAGNETO ASSY. & .....................EI (Electronic Ignition) PLUG, SPARK 9 CRANKCASE1 & HEAD, .......................PCV (Positive Crankcase CYLINDER1 Ventilation) 9 AIR FILTER ASSY. .................................ACL (Air Cleaner) 9 MUFF., 2, CAP, NET, WIRE2 & ARRESTER, SPARK
The above items and the corresponding acronyms are provided in accordance with U.S. EPA REGULATIONS FOR NEW NONROAD SPARK-IGNITION NONHANDHELD ENGINES. The acronyms conform to the latest version of the SAEs recommended practice docu- ment J1930, Diagnostic Acronyms, Terms, and Definitions For Electrical/Electronic System.
It is recommended that these items be serviced by a Yamaha dealer.
33
WIRING DIAGRAM
1 Oil warning light 2 Engine switch 3 TCI unit 4 Spark plug 5 Oil level switch 6 Oil warning unit
Color code R Red Y Yellow B Black L Blue B/W Black/White
LB
B
B
B
B/W
B/W B/W
YY
R
R
4
3
6
5
1
2
Read this manual carefully before operating this machine. This manual should stay with this machine if it is sold.
Water Pump
LIT-19626-02-49 9C9-28199-13
PRINTED IN JAPAN 2016.110.21 !
(E)
YP20T YP30T YP40T
OWNERS MANUAL
Read this manual carefully before operating this machine.
PRINTED ON RECYCLED PAPER 012226403
To begin your 3 year warranty coverage, please register online within 30 days of purchase:
www.yamahawarrantyregistration.com If you prefer, you can complete and mail this card. Be sure to attach proper postage.
Owners Name
Address
City State Zip
Phone Number ( ) -
E-mail address
Yamaha Pump Model Name:
Yamaha Pump Primary I.D. Serial Number: (See Machine Identification in your Owners Manual for location of this number) (The engine stamp is not the valid Primary ID Serial Number)
-
(Example) YP20GJ
(Example) Q9C - 0000000
Date Purchased / / Selling Dealer Name Month Day Year
9Please register online or complete and mail this form. It will help ensure that Yamaha has accurately registered your purchase for warranty.
9Manufacturers are required to maintain a complete up-to-date list of all first purchasers of products in the event of a safety-related defect or recall.
REGISTER ONLINE OR MAIL THIS CARD TO YAMAHA MOTOR CORPORATION, U.S.A.
Pump Warranty Registration
Register Your Pump at
www.yamahawarrantyregistration.com Or complete the card below and Mail
PUMP_WarrantyCard_US.indd 1 2013/04/24 14:59:51