Contents

COVER
INTRODUCTION
- A FEW WORDS ABOUT SAFETY
CONTENTS
ENGINE SAFETY
- IMPORTANT SAFETY INFORMATION
CONTROLS & FEATURES
- COMPONENT & CONTROL LOCATIONS
- CONTROLS
  - ENGINE SWITCH
  - CHOKE LEVER
  - THROTTLE LEVER
  - RECOIL STARTER GRIP
- FEATURES
  - OIL ALERT SYSTEM
BEFORE OPERATION
- 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
- MAINTENANCE SCHEDULE
- FUEL RECOMMENDATIONS
- ENGINE OIL LEVEL CHECK
- ENGINE OIL CHANGE
- ENGINE OIL RECOMMENDATIONS
- AIR FILTER INSPECTION
- AIR CLEANER SERVICE
- SPARK PLUG SERVICE
- IDLE SPEED ADJUSTMENT
- SPARK ARRESTER SERVICE (OPTIONAL EQUIPMENT)
HELPFUL TIPS & SUGGESTIONS
- STORING YOUR ENGINE
  - STORAGE PREPARATION
  - STORAGE PRECAUTIONS
  - REMOVAL FROM STORAGE
- TRANSPORTING
TAKING CARE OF UNEXPECTED PROBLEMS
- ENGINE WILL NOT START
- ENGINE LACKS POWER
TECHNICAL & CONSUMER INFORMATION
- TECHNICAL INFORMATION
  - SERIAL NUMBER LOCATION
  - REMOTE CONTROL LINKAGE
  - CARBURETOR MODIFICATION FOR HIGH ALTITUDE OPERATION
  - FUEL REGULATOR INFORMATION
  - EMISSION CONTROL SYSTEM INFORMATION
  - AIR INDEX
  - SPECIFICATIONS
  - WIRING DIAGRAM
- CONSUMER INFORMATION
  - HONDA PUBLICATIONS
  - WARRANTY SERVICE INFORMATION
QUICK REFERENCE INFORMATION

Honda GX270 2003 Owner's Manual

Pages 52

Year 2003

Language(s)

of 52

Honda GX270 2003 Engine Specification

The Honda GX270 2003 engine is a robust and reliable power unit designed for a wide range of industrial and commercial applications. It features a single-cylinder, four-stroke, overhead valve (OHV) design, which enhances fuel efficiency and ensures optimal power output. With a displacement of 270 cubic centimeters, the engine delivers a maximum output of approximately 8.5 horsepower at 3,600 revolutions per minute. The bore and stroke measure 77 millimeters by 58 millimeters, contributing to its balanced performance and longevity.

The GX270 is air-cooled and utilizes a horizontal shaft configuration, providing versatility in integration across various machinery. Its compression ratio is set at 8.5:1, optimizing combustion and improving fuel consumption. The engine is equipped with a recoil start system, ensuring reliable operation even in challenging conditions. A transistorized magneto ignition system provides easy starting and smooth operation.

Fuel is supplied via a float-type carburetor, and the engine features an integral fuel tank with a capacity of 5.3 liters, offering extended running time between refuels. The lubrication system is splash type, providing effective lubrication to critical components and reducing maintenance requirements. The engine is also designed with a low oil alert system, which automatically shuts down the engine when oil levels are insufficient, preventing damage.

The Honda GX270 2003 engine is compact, with dimensions of approximately 380 millimeters in length, 312 millimeters in width, and 346 millimeters in height, and it weighs around 25 kilograms. Its durable construction and quality materials ensure longevity and dependability, making it a preferred choice for demanding applications such as construction equipment, generators, and water pumps. The GX270's compliance with emissions regulations further underscores its suitability for global markets.

Honda GX270 2003 Engine F.A.Q.

How do I start the Honda GX270 2003 engine?

To start the Honda GX270 2003 engine, ensure the fuel valve is on, set the choke lever to the closed position, turn the engine switch to the 'ON' position, and pull the starter grip lightly until resistance is felt, then pull briskly.

What is the recommended oil type for the Honda GX270 engine?

Honda recommends using SAE 10W-30 oil for general use. Always check the oil level before each use and maintain it between the upper and lower marks on the dipstick.

How often should I change the oil in my Honda GX270 engine?

It is recommended to change the oil after the first 20 hours of operation and every 100 hours thereafter or at least once a year.

What should I do if the Honda GX270 engine won't start?

If the engine won't start, check the fuel level, ensure the fuel valve is open, check the spark plug for fouling or damage, and make sure the choke lever is in the correct position.

How do I clean the air filter on a Honda GX270 engine?

To clean the air filter, remove the air cleaner cover, take out the filter element, and wash it in warm soapy water. Rinse thoroughly and allow it to dry completely before reinstalling.

What is the spark plug gap for the Honda GX270 engine?

The correct spark plug gap for the Honda GX270 engine is 0.7-0.8 mm (0.028-0.031 in). Check and adjust the gap as necessary when replacing the spark plug.

How can I troubleshoot a Honda GX270 engine that is running rough?

If the engine is running rough, check for a dirty air filter, incorrect spark plug gap, stale fuel, or carburetor issues. Clean or replace components as necessary.

What is the proper procedure for storing a Honda GX270 engine long-term?

For long-term storage, drain the fuel tank and carburetor, change the oil, remove the spark plug and pour a tablespoon of clean engine oil into the cylinder, and pull the starter rope slowly to distribute the oil. Store the engine in a dry, dust-free area.

How often should I check the valve clearance on a Honda GX270 engine?

Valve clearance should be checked every 300 hours of operation. If you are not familiar with this procedure, it is recommended to have it performed by a qualified technician.

What regular maintenance tasks should I perform on my Honda GX270 engine?

Regular maintenance tasks include checking the oil level before each use, cleaning the air filter every 50 hours, changing the oil every 100 hours, checking the spark plug every 100 hours, and inspecting the fuel filter and valve clearance every 300 hours.