Contents

ENGLISH
- INTRODUCTION
- SAFETY MESSAGES
- CONTENTS
- SAFETY INFORMATION
- SAFETY LABEL LOCATION
- COMPONENT & CONTROL LOCATION
- FEATURES
  - OIL ALERT SYSTEM
  - CIRCUIT PROTECTOR
- BEFORE OPERATION CHECKS
  - IS YOUR ENGINE READY TO GO?
- OPERATION
  - SAFE OPERATING PRECAUTIONS
  - STARTING THE ENGINE
  - STOPPING THE ENGINE
  - SETTING ENGINE SPEED
- SERVICING YOUR ENGINE
  - THE IMPORTANCE OF MAINTENANCE
  - MAINTENANCE SAFETY
  - SAFETY PRECAUTIONS
  - MAINTENANCE SCHEDULE
  - REFUELING
  - ENGINE OIL
  - REDUCTION CASE OIL
  - AIR CLEANER
  - SEDIMENT CUP
  - SPARK PLUG
  - SPARK ARRESTER (APPLICABLE TYPES)
  - IDLE SPEED
- HELPFUL TIPS & SUGGESTIONS
  - STORING YOUR ENGINE
  - TRANSPORTING
- TAKING CARE OF UNEXPECTED PROBLEMS
  - FUSE REPLACEMENT (APPLICABLE TYPES)
- TECHNICAL INFORMATION
  - SERIAL NUMBER LOCATION
  - BATTERY CONNECTIONS FOR ELECTRIC STARTER (APPLICABLE TYPES)
  - REMOTE CONTROL LINKAGE
  - CARBURETOR MODIFICATIONS FOR HIGH ALTITUDE OPERATION
  - EMISSION CONTROL SYSTEM INFORMATION
  - AIR INDEX
  - SPECIFICATIONS
  - QUICK REFERENCE INFORMATION
  - WIRING DIAGRAMS
- CONSUMER INFORMATION
  - DISTRIBUTOR/DEALER LOCATOR INFORMATION
  - CUSTOMER SERVICE INFORMATION
FRANAIS
ESPAOL

Honda GX120 2007 Owner's Manual

Pages 60

Year 2007

Language(s)

of 60

Honda GX120 2007 Engine Specification

The Honda GX120 2007 engine is a compact, reliable power unit renowned for its efficiency and durability in various applications. This 118cc, four-stroke, overhead valve (OHV) engine is engineered to deliver high performance and fuel efficiency. With a bore and stroke of 60 mm x 42 mm, it offers a maximum power output of approximately 3.5 horsepower at 3,600 RPM and a torque of 7.5 Nm at 2,500 RPM. The engine features a horizontal shaft design, making it versatile for powering a range of equipment such as generators, water pumps, and small machinery.

The GX120 incorporates a transistorized magneto ignition system, ensuring reliable starting and smooth operation. Its splash lubrication system enhances durability by maintaining consistent oil distribution, reducing wear on engine components. The engine's carburetor is a float-type model, designed to provide optimal air-fuel mixing for efficient combustion.

Weighing around 13 kg, the GX120 is compact yet robust, with a fuel tank capacity of 2 liters, offering extended operation between refueling. The engine employs a dual-element air cleaner to protect internal components from dust and debris, enhancing longevity. Designed with a recoil starter, it ensures easy manual starting.

Compliance with various emission standards highlights Honda's commitment to environmental responsibility, making the GX120 a suitable choice for users seeking eco-friendly power solutions. Its construction features high-quality materials and precision engineering, ensuring longevity and reduced vibration during operation. The Honda GX120 2007 engine stands out for its balance of power, efficiency, and reliability, making it a preferred choice in commercial and industrial applications.

Honda GX120 2007 Engine F.A.Q.

How do I perform regular maintenance on the Honda GX120 2007 engine?

To perform regular maintenance on the Honda GX120 2007 engine, you should: 1) Check and change the oil every 20 hours of operation or monthly. 2) Clean or replace the air filter every 50 hours or more frequently in dusty environments. 3) Inspect and adjust the spark plug every 100 hours. 4) Check fuel level and replace fuel filter annually.

What type of oil should be used in the Honda GX120 engine?

Honda recommends using SAE 10W-30 oil for general use. Ensure that the oil is of high quality, detergent oil with an API service classification of SJ or higher.

Why is my Honda GX120 engine not starting?

Common reasons for a Honda GX120 engine not starting include: 1) Empty fuel tank or old fuel. 2) Dirty air filter. 3) Faulty spark plug. 4) Improper choke position. 5) Carburetor issues. Check these components to diagnose the problem.

How can I troubleshoot if the engine is running rough?

If the Honda GX120 engine is running rough, you should: 1) Check the air filter and clean it if necessary. 2) Inspect the spark plug for wear or damage and replace it if needed. 3) Ensure the carburetor is clean and properly adjusted. 4) Check for any fuel contamination or leaks.

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

The correct spark plug gap for the Honda GX120 engine is 0.7-0.8 mm (0.028-0.031 inches). This ensures optimal engine performance and efficiency.

How often should I change the air filter on a Honda GX120 engine?

The air filter on a Honda GX120 engine should be inspected and cleaned every 50 hours of operation or more frequently in dusty conditions. Replace the air filter annually or as needed if it is damaged or excessively dirty.

What is the recommended fuel for the Honda GX120 engine?

The Honda GX120 engine is designed to run on unleaded gasoline with a pump octane rating of 86 or higher. Avoid using fuel with more than 10% ethanol content.

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

To adjust the idle speed on a Honda GX120 engine, locate the idle speed adjustment screw on the carburetor. Turn the screw clockwise to increase idle speed or counterclockwise to decrease it, until the desired idle speed is achieved.

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

If the Honda GX120 engine is overheating, check for: 1) Obstructions in the cooling fins and clean them. 2) Ensure adequate ventilation. 3) Verify that the oil level is correct. 4) Check the air filter for cleanliness.

How do I store the Honda GX120 engine for the winter?

To store the Honda GX120 engine for the winter: 1) Drain the fuel tank and carburetor. 2) Change the engine oil. 3) Remove the spark plug and pour a teaspoon of oil into the cylinder, then pull the starter rope slowly to distribute the oil. 4) Clean the engine thoroughly and store it in a dry place.