Honda GX270 Owner's Manual
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Honda GX270 Owner's Manual

Honda lpg-fueled engine owner's manual
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Owner's Manual
GX270・GX390
LPG-Fueled Engine
2003 Honda Motor Co., Ltd. -All Rights Reserved

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Summary of Contents for Honda GX270

  • Page 1 Owner’s Manual GX270・GX390 LPG-Fueled Engine 2003 Honda Motor Co., Ltd. -All Rights Reserved...
  • Page 2 The information and specifications included in this publication were in effect at the time of approval for printing. Illustrations are based on the GX270 LPG. Honda Motor Co., Ltd. reserves the right, however, to discontinue or change specifications or design at any time without notice and without incurring any obligation whatever.
  • Page 3 INTRODUCTION Congratulations on your selection of a Honda engine. We are certain you will be pleased with your purchase of one of the finest engines on the market. We want to help you get the best results from your new engine and to operate it safely.

  • Page 4: A Few Words About Safety

    INTRODUCTION A FEW WORDS ABOUT SAFETY Your safety and the safety of others are very important. And using this engine safely is an important responsibility. To help you make informed decisions about safety, we have provided operating procedures and other information on labels and in this manual.

  • Page 5: Table Of Contents

    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 (applicable engine types) BEFORE OPERATION IS YOUR ENGINE READY TO GO? Check the General Condition of the Engine Check the Engine Check the Equipment Powered by This Engine OPERATION...
  • Page 6 CONTENTS 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 Emission Control System Information Air Index...

  • Page 7: Engine Safety

    ENGINE SAFETY IMPORTANT SAFETY INFORMATION Most accidents with engines can be prevented if you follow all instructions in this manual and on the engine. Some of the most common hazards are discussed below, along with the best way to protect yourself and others. Owner Responsibilities Honda engines are designed to give safe and dependable service if operated according to instructions.
  • Page 8 ENGINE SAFETY Carbon Monoxide Hazard Exhaust gas contains poisonous carbon monoxide. Avoid inhalation of exhaust gas. Never run the engine in a closed garage or confined area. Other Equipment Review the instructions provided with the equipment powered by this engine for any additional safety precautions that should be observed in conjunction with engine startup, shutdown, or operation, or protective apparel that may be needed to operate the equipment.

  • Page 9: Controls & Features

    CONTROLS & FEATURES COMPONENT & CONTROL LOCATIONS MUFFLER AIR CLEANER THROTTLE LEVER SPARK PLUG CHOKE LEVER STARTER GRIP RECOIL STARTER ENGINE SWITCH OIL DRAIN PLUG OIL FILLER CAP...

  • Page 10: Controls

    CONTROLS & FEATURES CONTROLS Engine Switch The engine switch enables and disables the ignition system. The engine switch must be in the ON position for the engine to run. Turning the engine switch to the OFF position stops the engine. ENGINE SWITCH...

  • Page 11: Choke Lever

    Choke Lever The choke lever opens and closes the choke valve in the carburetor. The CLOSED position creates a vacuum to help the LPG to flow into the engine during starting. The OPEN position removes the vacuum after the engine has started and can produced its own vacuum.

  • Page 12: Throttle Lever

    CONTROLS & FEATURES Throttle Lever The throttle lever controls engine speed. Moving the throttle lever in the directions shown makes the engine run faster or slower. Some engine applications use a remotely-mounted throttle control rather than the engine-mounted throttle lever shown here. Recoil Starter Grip Pulling the starter grip operates the recoil starter to crank the engine.

  • Page 13: Features

    CONTROLS & FEATURES FEATURES Oil Alert System (applicable engine types) The Oil Alert system is designed to prevent engine damage caused by an insufficient amount of oil in the crankcase. Before the oil level in the crankcase can fall below a safe limit, the Oil Alert system will automatically stop the engine (the ignition switch will remain in the ON position).

  • Page 14: Before Operation

    BEFORE OPERATION IS YOUR ENGINE READY TO GO? For your safety, and to maximize the service life of your equipment, it is very important to take a few moments before you operate the engine to check its condition. Be sure to take care of any problem you find, or have your servicing dealer correct it, before you operate the engine.

  • Page 15: Check The Engine

    Check the Engine Check the engine oil level (see page low oil level can cause engine damage. The Oil Alert system (applicable engine types) will automatically stop the engine before the oil level falls below safe limits. However, to avoid the inconvenience of an unexpected shutdown, always check the engine oil level before startup.

  • Page 16: Operation

    OPERATION SAFE OPERATING PRECAUTIONS Before operating the engine for the first time, please review the IMPORTANT SAFETY INFORMATION on page and the chapter titled BEFORE OPERATION . Carbon monoxide gas is toxic. Breathing it can cause unconsciousness and even kill you. Avoid any areas or actions that expose you to carbon monoxide.

  • Page 17: Throttle Lever

    Move the choke lever to the CLOSED position. Always use the choke when starting the engine. Some engine applications use a remotely-mounted choke control rather than the engine-mounted choke lever shown here. CHOKE LEVER Move the throttle lever away from the SLOW position, about 1/3 of the way toward the FAST position.
  • Page 18 OPERATION Turn the engine switch to the ON position. ENGINE SWITCH Operate the starter. Pull the starter grip lightly until you feel resistance, then pull briskly. Return the starter grip gently. STARTER GRIP...
  • Page 19 OPERATION Move the choke lever to the OPEN position after the engine has started. CHOKE LEVER OPEN...

  • Page 20: Stopping The Engine

    OPERATION STOPPING THE ENGINE To stop the engine in an emergency, simply turn the engine switch to the OFF position. Under normal conditions, use the following procedure. Move the throttle lever to the SLOW position. Some engine applications use a remotely-mounted throttle control rather than the engine-mounted throttle lever shown here.

  • Page 21: Setting Engine Speed

    SETTING ENGINE SPEED Position the throttle lever for the desired engine speed. Some engine applications use a remotely-mounted throttle control rather than the engine-mounted throttle lever shown here. For engine speed recommendations, refer to the instructions provided with the equipment powered by this engine. THROTTLE LEVER OPERATION SLOW...

  • Page 22: Servicing Your Honda Engine

    SERVICING YOUR ENGINE THE IMPORTANCE OF MAINTENANCE Good maintenance is essential for safe, economical, and trouble-free operation. It will also help reduce air pollution. Improperly maintaining this engine, or failure to correct a problem before operation, can cause a malfunction in which you can be seriously hurt or killed.

  • Page 23: Maintenance Safety

    MAINTENANCE SAFETY Some of the most important safety precautions follow. However, we cannot warn you of every conceivable hazard that can arise in performing maintenance. Only you can decide whether or not you should perform a given task. Failure to properly follow maintenance instructions and precautions can cause you to be seriously hurt or killed.

  • Page 24: Maintenance Schedule

    SERVICING YOUR ENGINE MAINTENANCE SCHEDULE REGULAR SERVICE PERIOD (3) ITEM Perform at every indicated month or operating hour interval, whichever comes first. Engine oil (LPG model) Reduction gear oil (Equipped model) Air filter Sediment cup Spark plug Spark arrester (optional parts) Idle speed Valve clearance Combustion chamber...

  • Page 25: Fuel Recommendations

    FUEL RECOMMENDATIONS Use LPG with a propane content of 95% or higher. This engine is certified to operate on LPG only. Occasionally you may hear a light ‘‘spark knock’’ or ‘‘pinging’’ (metallic rapping noise) while operating under heavy loads. This is no cause for concern.

  • Page 26: Engine Oil Level Check

    SERVICING YOUR ENGINE ENGINE OIL LEVEL CHECK Check the engine oil level with the engine stopped and in a level position. Remove the filler cap/dipstick and wipe it clean. Insert and remove the dipstick without screwing it into the filler neck. Check the oil level shown on the dipstick.

  • Page 27: Engine Oil Change

    ENGINE OIL CHANGE Drain the used oil while the engine is warm. Warm oil drains quickly and completely. Place a suitable container below the engine to catch the used oil, then remove the filler cap/dipstick and the drain plug. Allow the used oil to drain completely, then reinstall the drain plug, and tighten it securely.

  • Page 28: Engine Oil Recommendations

    SERVICING YOUR ENGINE ENGINE OIL RECOMMENDATIONS Oil is a major factor affecting performance and service life. Use 4-stroke automotive detergent oil that is designed for engines operating on LPG. SAE 30 (API service classification SJ) is recommended for general use. The following are examples of oils that meet Honda’s requirements for LPG-fueled engines: For operation in temperatures below 32°F (0°C), 5W-30 synthetic oil...

  • Page 29: Air Filter Inspection

    AIR FILTER INSPECTION Remove the air cleaner cover and inspect the filter elements. Clean or replace dirty filter elements. Always replace damaged filter elements. Refer to page for instructions that apply to the air cleaner and filter service. PAPER FILTER ELEMENT FOAM FILTER...

  • Page 30: Air Cleaner Service

    SERVICING YOUR ENGINE AIR CLEANER SERVICE A dirty air filter will restrict air flow to the carburetor, reducing engine performance. If you operate the engine in very dusty areas, clean the air filter more often than specified in the MAINTENANCE SCHEDULE. Operating the engine without an air filter, or with a damaged air filter, will allow dirt to enter the engine, causing rapid engine wear.

  • Page 31: Servicing Your Engine

    Paper air filter element: Tap the filter element several times on a hard surface to remove dirt, or blow compressed air [not exceeding 30 psi (207 kPa, 2.1 kgf/cm )] through the filter element from the inside. Never try to brush off dirt; brushing will force dirt into the fibers. Foam air filter element: Clean in warm soapy water, rinse, and allow to dry thoroughly.

  • Page 32: Spark Plug Service

    SERVICING YOUR ENGINE SPARK PLUG SERVICE Recommended spark plugs: An incorrect spark plug can cause engine damage. Disconnect the spark plug cap, and remove any dirt from around the spark plug area. Remove the spark plug with a 13/16-inch spark plug wrench. Inspect the spark plug.

  • Page 33: Idle Speed Adjustment

    After the spark plug seats, tighten with a 13/16-inch spark plug wrench to compress the washer. If reinstalling the used spark plug, tighten 1/8 1/4 turn after the spark plug seats. If installing a new spark plug, tighten 1/2 turn after the spark plug seats.

  • Page 34: Spark Arrester Service (Optional Part)

    SERVICING YOUR ENGINE SPARK ARRESTER SERVICE (optional equipment) Your engine is not factory-equipped with a spark arrester. In some areas, it is illegal to operate an engine without a spark arrester. Check local laws and regulations. A spark arrester is available from authorized Honda servicing dealers.

  • Page 35: Helpful Tips & Suggestions

    HELPFUL TIPS & SUGGESTIONS STORING YOUR ENGINE Storage Preparation Proper storage preparation is essential for keeping your engine troublefree and looking good. The following steps will help to keep rust and corrosion from impairing your engine’s function and appearance, and will make the engine easier to start when you use it again.

  • Page 36: Storage Precautions

    HELPFUL TIPS & SUGGESTIONS Engine Oil Change the engine oil (see page 25). Engine Cylinder Remove the spark plug (see page 30). Pour a tablespoon (5 10 cc) of clean engine oil into the cylinder. Pull the starter rope several times to disribute the oil in the cylinder. Reinstall the spark plug.

  • Page 37: Removal From Storage

    HELPFUL TIPS & SUGGESTIONS Position the equipment so the engine is level. Tilting can cause oil leakage. With the engine and exhaust system cool, cover the engine to keep out dust. A hot engine and exhaust system can ignite or melt some materials.

  • Page 38: Transporting

    HELPFUL TIPS & SUGGESTIONS TRANSPORTING If the engine has been running, allow it to cool for at least 15 minutes before loading the engine-powered equipment on the transport vehicle. A hot engine and exhaust system can burn you and can ignite some materials.

  • Page 39: Taking Care Of Unexpected Problems

    TAKING CARE OF UNEXPECTED PROBLEMS ENGINE WILL NOT START Check control positions. Check fuel. Remove and inspect spark plug. Take engine to an authorized Honda servicing dealer, or refer to shop manual. ENGINE LACKS POWER Check air filter. Take engine to an authorized Honda servicing dealer, or refer to shop manual.

  • Page 40: Technical & Consumer Information

    TECHNICAL & CONSUMER INFORMATION TECHNICAL INFORMATION Serial Number Location Record the engine serial number in the space below. You will need this serial number when ordering parts, and when making technical or warranty inquires (see page Engine serial number: SERIAL NUMBER &...

  • Page 41: Remote Control Linkage

    TECHNICAL & CONSUMER INFORMATION Remote Control Linkage The throttle and choke control levers are provided with holes for optional cable attachment. The following illustrations show installation examples for a solid wire cable and for a flexible, braided wire cable. If using a flexible, braided wire cable, add a return spring as shown.

  • Page 42: Carburetor Modification For High Altitude Operation

    TECHNICAL & CONSUMER INFORMATION Carburetor Modification for High Altitude Operation The GX270 and GX390 LPG-fueled engine do not require any modifications for high-altitude operation. However, performance will decrease at high altitudes. Fuel Regulator Information This engine is certified to comply with U.S. EPA and California ARB emission regulations using the Impco Beam regulator specified in the installation instructions (see below).

  • Page 43: Emission Control System Information

    TECHNICAL & CONSUMER INFORMATION Emission Control System Information Source of Emissions The combustion process produces carbon monoxide, oxides of nitrogen, and hydrocarbons. Control of hydrocarbons and oxides of nitrogen is very important because, under certain conditions, they react to form photochemical smog when subjected to sunlight. Carbon monoxide does not react in the same way, but it is toxic.
  • Page 44 TECHNICAL & CONSUMER INFORMATION Problems That May Affect Emissions If you are aware of any of the following symptoms, have your engine inspected and repaired by your servicing dealer. Hard starting or stalling after starting. Rough idle. Misfiring or backfiring under load. Afterburning (backfiring).

  • Page 45: Air Index

    TECHNICAL & CONSUMER INFORMATION Air Index An Air Index Information hang tag/label is applied to engines certified to an emission durability time period in accordance with the requirements of the California Air Resources Board. The bar graph is intended to provide you, our customer, the ability to compare the emissions performance of available engines.

  • Page 46: Specifications

    [Bore × Stroke] Max. output Max. torque Fuel consumption Cooling system Ignition system PTO shaft rotation GX270/GX390 Tuneup ITEM Spark plug gap Valve clearance Other specifications 15.7 (400 50.7 lbs (23.0 kg) 4-stroke, overhead valve, single cylinder 16.5 cu-in (270 cm ) ×...

  • Page 47: Wiring Diagram

    TECHNICAL & CONSUMER INFORMATION Wiring Diagram Engine Types With Oil Alert...

  • Page 48: Consumer Information

    TECHNICAL & CONSUMER INFORMATION CONSUMER INFORMATION Honda Publications These publications will give you additional information for maintaining and repairing your engine. You may order them from your Honda engine dealer. Shop Manual This manual covers complete maintenance and overhaul procedures. It is intended to be used by a skilled technician.

  • Page 49: Warranty Service Information

    TECHNICAL & CONSUMER INFORMATION Warranty Service Information Servicing dealership personnel are trained professionals. They should be able to answer any question you may have. If you encounter a problem that your dealer does not solve to your satisfaction, please discuss it with the dealership’s management. The Service Manager or General Manager can help.
  • Page 50 MEMO...

  • Page 51: Quick Reference Information

    QUICK REFERENCE INFORMATION Fuel Engine Oil Spark Plug Carburetor Maintenance Type LPG with a propane content of 95 % or higher Type SAE 30, API SJ, for general use (page 26) Capacity 1.16 US qt (1.10 ) Type NGK: DENSO: 0.028 0.031 in (0.70 0.80 mm) (page 30) Idle speed...
  • Page 52 K1:GX390 31ZK6601 300.2003.10 英 00X31-ZK6-6010 Printed in Japan...

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