Contents

INTRODUCTION
SAFETY MESSAGES
CONTENTS
SAFETY INFORMATION
SAFETY LABEL LOCATIONS
COMPONENT & CONTROL LOCATIONS
FEATURES
- OIL ALERT SYSTEM (APPLICABLE TYPES)
- CIRCUIT PROTECTOR (APPLICABLE TYPES)
BEFORE OPERATION CHECKS
- IS YOUR ENGINE READY TO GO?
OPERATION
- SAFE OPERATING PRECAUTIONS
STARTING THE ENGINE
- RECOIL STARTER
STOPPING THE ENGINE
SETTING ENGINE SPEED
SERVICING YOUR ENGINE
- THE IMPORTANCE OF MAINTENANCE
- MAINTENANCE SAFETY
- MAINTENANCE SCHEDULE
- REFUELING
- ENGINE OIL
- OIL CHANGE
- AIR CLEANER
- SEDIMENT CUP
- SPARK PLUG
- SPARK ARRESTER (APPLICABLE TYPES)
- IDLE SPEED
HELPFUL TIPS & SUGGESTIONS
- STORAGING YOUR ENGINE
- STORAGE PREPARATION
- DRAINING THE FUEL TANK AND CARBURETOR
- TRANSPORTING
TAKING CARE OF UNEXPECTED PROBLEMS
- FUSE REPLACEMENT
TECHNICAL INFORMATION
- SERIAL NUMBER LOCATION
- REMOTE CONTROL LINKAGE
- CARBURETOR MODIFICATIONS FOR HIGH ALTITUDE OPERATION
- EMISSION CONTROL SYSTEM INFORMATION
- REPLACEMENT PARTS
- AIR INDEX
- SPECIFICATIONS
- QUICK REFERENCE INFORMATION
- WIRING DIAGRAMS
- CONSUMER INFORMATION
FRANAIS
ESPAOL

Honda GX120 2009 Owner's Manual

Pages 60

Year 2009

Language(s)

of 60

Honda GX120 2009 Engine Specification

The Honda GX120 2009 engine is a robust and reliable power unit renowned for its efficiency and durability. This four-stroke, overhead valve (OHV) engine has a displacement of 118cc, delivering a net power output of approximately 3.5 horsepower at 3,600 RPM. Designed for a wide range of applications, it features a horizontal shaft configuration that enhances versatility. The engine operates with a bore and stroke of 60 mm by 42 mm, offering a compact design conducive to various equipment installations.

Fuel efficiency is a hallmark of the GX120, attributed to its precision-engineered components and efficient combustion process. The engine's fuel tank capacity is 2.0 liters, supporting extended operation times, which is particularly advantageous for demanding tasks. It uses unleaded gasoline and features a carburetor equipped with a float-type fuel delivery system, ensuring consistent performance across different working conditions.

The ignition system is transistorized magneto, providing reliable starting and consistent spark delivery. For ease of operation, the engine incorporates a recoil starter system. The lubrication is achieved through a splash system, maintaining optimal performance and longevity. The Honda GX120 includes a dual-element air cleaner, enhancing engine protection and promoting longevity by effectively filtering intake air. It also has an automatic decompression system, facilitating easier starting by reducing the effort needed to pull the starter rope.

The compact dimensions, with a dry weight of approximately 12.1 kilograms, make the GX120 easily manageable and adaptable to various machinery. Known for its low noise and vibration levels, this engine complies with stringent emission standards, underscoring Honda's commitment to environmental responsibility. The Honda GX120 2009 exemplifies a balance of power, efficiency, and reliability, making it a preferred choice for commercial and residential applications.

Honda GX120 2009 Engine F.A.Q.

How do I start the Honda GX120 2009 engine?

To start the Honda GX120 2009 engine, ensure the fuel valve is open, set the choke lever to the closed position, turn the engine switch to 'ON', and pull the starter grip lightly until resistance is felt, then pull briskly.

What type of oil is recommended for the Honda GX120 2009 engine?

It is recommended to use SAE 10W-30 motor oil for general use. Always check the oil level before each use and change it according to the maintenance schedule.

How often should I change the oil in my Honda GX120 2009 engine?

The oil should be changed after the first 20 hours of operation, and then every 100 hours or every season thereafter.

What is the spark plug gap for the Honda GX120 2009 engine?

The correct spark plug gap for the Honda GX120 2009 engine is 0.7-0.8 mm (0.028-0.031 inches).

How do I troubleshoot a Honda GX120 2009 engine that won't start?

Check the fuel level, ensure the fuel valve is open, verify the choke is set correctly, inspect the spark plug for fouling, and make sure the engine switch is 'ON'. Additionally, check the air filter for blockages.

What maintenance should be performed on the air filter of a Honda GX120 2009 engine?

The air filter should be checked before each use and cleaned every 25 hours of operation. Replace it if it is damaged or excessively dirty.

What is the correct procedure for storing the Honda GX120 2009 engine?

To store the engine, drain the fuel tank and carburetor, change the oil, remove the spark plug and add a tablespoon of oil into the cylinder, and then pull the recoil starter several times to distribute the oil. Store in a dry place.

How do I adjust the idle speed on a Honda GX120 2009 engine?

To adjust the idle speed, locate the idle adjustment screw on the carburetor. Turn the screw clockwise to increase the idle speed or counterclockwise to decrease it until the desired idle speed is reached.

What should I do if my Honda GX120 2009 engine is overheating?

Check for obstructions in the cooling fins, ensure the oil level is correct, and verify that the air intake is not blocked. Reduce the load if necessary and ensure proper ventilation around the engine.

How can I improve the fuel efficiency of my Honda GX120 2009 engine?

Maintain regular servicing, use fresh fuel, check and replace air filters as needed, and ensure the engine is not overloaded. Proper adjustment of the carburetor can also help improve efficiency.