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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.
This manual contains information on how to do that; please read it
carefully before operating the engine. If a problem should arise, or
if you have any questions about your engine, consult an
authorized Honda servicing dealer.
All information in this publication is based on the latest product
information available at the time of printing. Honda Motor Co., Ltd.
reserves the right to make changes at any time without notice and
without incurring any obligation. No part of this publication may
be reproduced without written permission.
This manual should be considered a permanent part of the engine
and should remain with the engine if resold.
Review the instructions provided with the equipment powered by
this engine for any additional information regarding engine
startup, shutdown, operation, adjustments or any special
maintenance instructions.
United States, Puerto Rico, and U.S. Virgin Islands:
We suggest you read the warranty policy to fully understand its
coverage and your responsibilities of ownership. The warranty
policy is a separate document that should have been given to you
by your dealer.

SAFETY MESSAGES

Your safety and the safety of others are very important. We have
provided important safety messages in this manual and on the
engine. Please read these messages carefully.
A safety message alerts you to potential hazards that could hurt
you or others. Each safety message is preceded by a safety alert
symbol
and one of three words, DANGER, WARNING, or
CAUTION.
These signal words mean:
Each message tells you what the hazard is, what can happen, and
what you can do to avoid or reduce injury.
DAMAGE PREVENTION MESSAGES
You will also see other important messages that are preceded by
the word NOTICE.
This word means:
Your engine or other property can be damaged if you
don't follow instructions.
The purpose of these messages is to help prevent damage to your
engine, other property, or the environment.
2009 Honda Motor Co., Ltd.
GX240U1·GX270U·GX340U1·GX390U1·GX240R1·GX270R·GX340R1·GX390R1
37Z5F611
00X37-Z5F-6111
You WILL be KILLED or SERIOUSLY
HURT if you don't follow instructions.
You CAN be KILLED or SERIOUSLY
HURT if you don't follow instructions.
You CAN be HURT if you don't follow
instructions.
All Rights Reserved
OWNER'S MANUAL
MANUEL DE L'UTILISATEUR
MANUAL DEL PROPIETARIO
GX240 · GX270 · GX340 · GX390
The engine exhaust from this product
contains chemicals known to the State of
California to cause cancer, birth defects
or other reproductive harm.
CONTENTS
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CHECKS
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MAINTENANCE
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Oil Level Check
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ENGLISH
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Air Index
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Summary of Contents for Honda GX240U1

  • 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. This manual contains information on how to do that; please read it OWNER’S MANUAL carefully before operating the engine.
  • Page 2: Safety Information

    Make sure the operator injury. Read it carefully. receives adequate instruction before operating the equipment. If the label comes off or becomes hard to read, contact your Honda Do not allow children to operate the engine. Keep children and servicing dealer for replacement.
  • Page 3: Component & Control Locations

    COMPONENT & CONTROL LOCATIONS FEATURES FUEL FILLER CAP OIL ALERT SYSTEM (applicable types) ‘‘Oil Alert is a registered trademark in the United States’’ FUEL TANK 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 engine switch will remain in the ON position).
  • Page 4: Before Operation

    BEFORE OPERATION CHECKS OPERATION IS YOUR ENGINE READY TO GO? SAFE OPERATING PRECAUTIONS For your safety, and to maximize the service life of your Before operating the engine for the first time, please review the equipment, it is very important to take a few moments before you SAFETY INFORMATION section on page and the BEFORE OPERATION CHECKS on page .
  • Page 5 To restart a warm engine, leave the choke lever or choke rod in Operate the starter. the OPEN position. RECOIL STARTER Some engine applications use a remote-mounted choke control rather than the engine-mounted choke lever shown here. Refer Pull the starter grip lightly until you feel resistance, then pull to the instructions provided by the equipment manufacturer.
  • Page 6: Stopping The Engine

    STOPPING THE ENGINE SETTING ENGINE SPEED To stop the engine in an emergency, simply turn the engine switch Position the throttle lever for the desired engine speed. to the OFF position. Under normal conditions, use the following procedure. Refer to the instructions provided by the equipment Some engine applications use a remote-mounted throttle control manufacturer.
  • Page 7: Servicing Your Engine

    To ensure the best quality and reliability, use only new Honda Failure to follow this maintenance schedule could result in non- Genuine parts or their equivalents for repair and replacement.
  • Page 8: Refueling

    Distributor’s Limited Warranty. For refueling, refer to the manufacturer’s instructions provided AMBIENT TEMPERATURE with the equipment. See the following for a Honda supplied standard fuel tank refueling instruction. SAE 10W-30 is recommended for general use. Other viscosities...
  • Page 9: Oil Level Check

    Oil Level Check Install the oil filler cap/dipstick and tighten securely. OIL FILLER CAP/ Check the engine oil level with the engine stopped and in a level DIPSTICK position. Remove the oil filler cap/dipstick and wipe it clean. Insert the oil filler cap/dipstick into the oil filler neck as shown, WASHER 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 (see page ).
  • Page 11 Reassemble the air cleaner, and tighten the wing nut securely. Clean the air filter elements if they are to be reused. SINGLE-FILTER ELEMENT TYPE OIL-BATH TYPE Paper air filter element: Tap the filter element several times on a WING NUT WING NUT hard surface to remove dirt, or blow compressed air [not exceeding 207 kPa (2.1 kgf/cm , 30 psi)] through the filter...
  • Page 12: Sediment Cup

    SEDIMENT CUP SPARK PLUG Cleaning Recommended Spark Plugs: BPR6ES (NGK) W20EPR-U (DENSO) The recommended spark plug has 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 keep rust and corrosion from impairing your engine’s function and arrester is available from authorized Honda servicing dealers. appearance, and will make the engine easier to start when you use The spark arrester must be serviced every 100 hours to keep it it again.
  • 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 Honda servicing dealer for repair. to shop malfunction, manual. valves stuck, etc. ENGINE LACKS...
  • Page 16: Technical Information

    TECHNICAL INFORMATION Remote Control Linkage Serial Number Location The throttle and choke control levers are provided with holes for Record the engine serial optional cable attachment. The following illustrations show number in the space below. You installation examples for a solid wire cable and for a flexible, will need this information when braided wire cable.
  • Page 17: Carburetor Modifications For High Altitude Operation

    The following instructions and procedures must be followed in order to keep the emissions from your Honda engine within the When the carburetor has been modified for high altitude operation, emission standards.
  • Page 18: Specifications

    Air Index Specifications (Models certified for sale in California) GX240/GX270 (PTO shaft type S, with fuel tank) An Air Index Information label is applied to engines certified to an Length × Width × × × 422 mm emission durability time period in accordance with the Height (14.0 ×...
  • Page 19: Tuneup Specifications

    Valve clearance IN: 0.15 ± 0.02 mm See your (cold) EX: 0.20 ± 0.02 mm authorized Honda dealer Other No other adjustments needed. specifications Quick Reference Information Fuel Unleaded gasoline (Refer to page 8) U.S. Pump octane rating 86 or higher...
  • Page 20: Consumer Information

    All Other Areas: satisfaction, please discuss it with the dealership’s management. Please contact the Honda distributor in your area for assistance. The Service Manager, General Manager, or Owner can help. Almost all problems are solved in this way.

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