Page 1: Table Of Contents
INTRODUCTION Thank you for purchasing a Honda engine. We want to help you to get the best results from your new engine and to operate it safely. OWNER’S MANUAL This manual contains information on how to do that; please read it carefully before operating the engine.
Page 2: Safety Information
MUFFLER AIR CLEANER This label warns you of potential hazards that can cause serious injury. Read it carefully. If the label comes off or becomes hard to read, contact your Honda dealer for replacement. SPARK PLUG STARTER GRIP ENGINE CONTROL TYPES...
Page 3: Features
FEATURES BEFORE OPERATION CHECKS OIL ALERT SYSTEM (applicable types) IS YOUR ENGINE READY TO GO? The Oil Alert system is designed to prevent engine damage caused by an insufficient amount of oil in the crankcase. Before For your safety, and to maximize the service life of your the oil level in the crankcase can fall below a safe limit, the Oil equipment, it is very important to take a few moments before you Alert system will automatically stop the engine (the engine...
Page 4: Operation
OPERATION Move the throttle lever away from the MIN. position, about 1/3 of the way toward the MAX. position. SAFE OPERATING PRECAUTIONS Before operating the engine for the first time, please review the SAFETY INFORMATION section on page and the BEFORE OPERATION CHECKS on page .
Page 5: Stopping The Engine
Operate the starter. STOPPING THE ENGINE RECOIL STARTER To stop the engine in an emergency, simply turn the engine switch to the OFF position. Under normal conditions, use the following Pull the starter grip lightly until you feel resistance, then pull procedure.
Page 6: Setting Engine Speed
SETTING ENGINE SPEED Position the throttle lever for the desired engine speed. Some engine applications use a remote-mounted throttle control rather than the engine-mounted throttle lever shown here. Refer to the instructions provided by the equipment manufacturer. For engine speed recommendations, refer to the instructions provided with the equipment powered by this engine.
Page 7: Servicing Your Engine
Let the engine and exhaust system cool before touching. proficient. Refer to Honda shop manual for service procedures. Injury from moving parts. Do not run the engine unless instructed to do so.
Page 8: Refueling
If spark knock or pinging shown in the chart may be used when the average temperature in persists, see an authorized Honda servicing dealer. your area is within the indicated range. Running the engine with persistent spark knock or pinging can cause engine damage.
Page 9: Oil Level Check
Oil Level Check Install the oil filler cap/dipstick and tighten securely. Check the engine oil level with the engine stopped and in a level position. OIL FILLER CAP/ DIPSTICK Remove the oil filler cap/dipstick and wipe it clean. WASHER Insert the oil filler cap/dipstick into the oil filler neck as shown, but do not screw it in, then remove it to check the oil level.
Page 10: Oil Change
Oil Change AIR CLEANER Drain the used oil while the engine is warm. Warm oil drains A dirty air cleaner will restrict air flow to the carburetor, reducing quickly and completely. engine performance. If you operate the engine in very dusty areas, clean the air filter more often than specified in the MAINTENANCE Place a suitable container below the reduction case to catch the SCHEDULE.
Page 11 OIL BATH TYPE ONLY: Fill the air cleaner case to the OIL LEVEL mark with the same oil that is recommended for the engine (see page ). Oil capacities GX240/GX270: 60 cm (2.0 US oz , 2.1 Imp oz) GX340/GX390: 80 cm (2.7 US oz , 2.8 Imp oz)
Page 12: Sediment Cup
SEDIMENT CUP SPARK PLUG Cleaning Recommended Spark Plugs: BPR6ES (NGK) W20EPR-U (DENSO) The recommended spark plug is the correct heat range for normal engine operating temperatures. Gasoline is highly flammable and explosive, and you can be burned or seriously injured when handling fuel.
Page 13: Spark Arrester
Check local laws and regulations. A spark Storage Preparation arrester is available from authorized Honda servicing dealers. Proper storage preparation is essential for keeping your engine trouble-free and looking good. The following steps will help to The spark arrester must be serviced every 100 hours to keep it keep rust and corrosion from impairing your engine’s function and...
Page 14: Transporting
Draining the Fuel Tank and Carburetor Storage Precautions If your engine will be stored with gasoline in the fuel tank and carburetor, it is important to reduce the hazard of gasoline vapor ignition. Select a well-ventilated storage area away from any Gasoline is highly flammable and explosive, and you appliance that operates with a flame, such as a furnace, water can be burned or seriously injured when handling...
Page 15: Taking Care Of Unexpected Problems
Frequent fuse failure usually indicates a short circuit or an servicing malfunction, overload in the electrical system. If the fuse burns out frequently, dealer, or refer ignition take the engine to a servicing Honda dealer for repair. to shop malfunction, manual. valves stuck, etc. ENGINE LACKS...
Page 16: Technical & Consumer
TECHNICAL & CONSUMER INFORMATION Remote Control Linkage TECHNICAL INFORMATION The throttle and choke control levers are provided with holes for optional cable attachment. The following illustrations show Serial Number Location installation examples for a solid wire cable and for a flexible, Record the engine serial braided wire cable.
Page 17: Oxygenated Fuels
For use at low altitudes, have your servicing dealer return the carburetor to original factory specifications. The following instructions and procedures must be followed in order to keep the emissions from your Honda engine within the Oxygenated Fuels emission standards.
Page 18: Specifications
Air Index Specifications An Air Index Information hang tag/label is applied to engines GX240/GX270 (PTO shaft type S) certified to an emission durability time period in accordance with Length Width 410 mm the requirements of the California Air Resources Board.
Page 19: Quick Reference
Quick Reference Information Wiring Diagrams Fuel Unleaded gasoline (Refer to page 8) With Oil Alert and Electric Starter U.S. Pump octane rating 86 or higher Except Research octane rating 91 or higher U.S. Pump octane rating 86 or higher Engine oil SAE 10W-30, API SJ or SL, for general use.
Page 20: Consumer Information
If you are dissatisfied with the decision made by the dealership’s All Other Areas: management, contact the Honda Regional Engine Distributor for Please contact the Honda distributor in your area for assistance. your area. If you are still dissatisfied after speaking with the Regional Engine Distributor, you may contact the Honda’s Office as shown.

This manual is also suitable for:

Gx270 Gx390 Gx340

Honda GX240 Owner's Manual

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INTRODUCTION

SAFETY MESSAGES

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Summary of Contents for Honda GX240

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