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Honda GX25-GX35 Owner's Manual

Honda engine owner's manual
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05/12/16 14:58:13 32Z6J600_001
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 is 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.
2005 Honda Motor Co., Ltd.
37Z6J601
00X37-Z6J-6010
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
GX25NT·GX35NT
OWNER'S MANUAL
MANUEL DE L'UTILISATEUR
MANUAL DEL PROPIETARIO
GX25·GX35
The engine exhaust from this product
contains chemicals known to the State of
California to cause cancer, birth defects
or other reproductive harm.
CONTENTS
INTRODUCTION
.......................
SAFETY MESSAGES
................
..........
SAFETY INDICATION
................................
................................
FEATURES
................................
BEFORE OPERATION
CHECKS
....................................
OPERATION
..............................
SAFE OPERATING
PRECAUTIONS
.....................
......
.....
......
.....
MAINTENANCE
....................
......
.......
MAINTENANCE
SCHEDULE
............................
...........................
...........................
............
Oil Level Check
..................
Oil Change
.........................
AIR CLEANER
......................
Inspection
........................
Cleaning
..........................
ENGLISH
.1
SPARK PLUG
......................
.1
COOLING FINS
...................
.2
FUEL FILTER AND FUEL
TANK
...................................
.2
SPARK ARRESTER
.............
.2
SUGGESTIONS
......................
.3
STORING YOUR ENGINE .14
...
TRANSPORTING
................
.4
TAKING CARE OF
.4
UNEXPECTED PROBLEMS
....
TECHNICAL & CONSUMER
.4
INFORMATION
.......................
.4
Serial Number Location
.....
.5
Remote Control Linkage
.....
.6
Carburetor Modifications for
.6
High Altitude Operation
.....
Oxygenated Fuels
...............
.6
Emission Control System
.6
Information
.........................
.7
Air Index
..............................
Specifications
.....................
.7
Tuneup Specifications
........
.8
Quick Reference
.8
Information
.........................
.8
................
.9
.9
.10
Information
.........................
.10
.10
Information
.........................
.11
.11
.12
.12
.14
.15
.16
.16
.16
.16
.17
.17
.17
.18
.18
.19
.19
.19
.
.20
.20
1

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  Summary of Contents for Honda GX25-GX35

  • Page 1: Table Of Contents

    05/12/16 14:58:13 32Z6J600_001 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.
  • Page 2: Location

    05/12/16 14:58:25 32Z6J600_002 SAFETY INFORMATION Understand the operation of all controls and learn how to stop the engine quickly in case of emergency. Make sure the operator receives adequate instruction before operating the equipment. Do not allow children to operate the engine. Keep children and pets away from the area of operation.
  • Page 3 05/12/16 14:58:34 32Z6J600_003 Tiller type: STARTER GRIP TOP COVER AIR CLEANER PRIMING BULB FUEL FILLER CAP OIL FILLER CAP/ DIPSTICK MUFFLER SPARK PLUG (inside the top cover) (inside the top cover) ENGINE CONTROLS GX25 CHOKE LEVER GX35 CHOKE LEVER FEATURES Centrifugal Clutch (Standard/Tiller type) RECOIL STARTER The centrifugal clutch automatically engages and transmits power...
  • Page 4: Starting The Engine

    05/12/16 14:58:55 32Z6J600_004 BEFORE OPERATION CHECKS 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 5: Setting Engine Speed

    05/12/16 14:59:18 32Z6J600_005 Pull the starter grip lightly until you feel resistance, then pull briskly. Return the starter grip gently. Standard/Pump type: Tiller type: STARTER GRIP STARTER GRIP (EQUIPMENT SIDE) Do not allow the starter grip to snap back against the engine. Return it gently to prevent damage to the starter.
  • Page 6: Stopping The Engine

    05/12/16 14:59:35 32Z6J600_006 STOPPING THE ENGINE Standard/Tiller type: To stop the engine in an emergency, simply turn the engine switch on the equipment to the OFF position. Under normal conditions, use the following procedure. Move the throttle lever to the MIN. position. The throttle lever shown here will be connected to a remote control on the equipment powered by this engine.
  • Page 7: Safety Precautions

    05/12/16 14:59:53 32Z6J600_007 SAFETY PRECAUTIONS Make sure the engine is off before you begin any maintenance or repairs. This will eliminate several potential hazards: − Carbon monoxide poisoning from engine exhaust. Be sure there is adequate ventilation whenever you operate the engine.
  • Page 8: Recommended Oil

    05/12/16 15:00:13 32Z6J600_008 REFUELING Recommended Fuel Unleaded gasoline U.S. Pump octane rating 86 or higher Except U.S. Research octane rating 91 or higher Pump octane rating 86 or higher This engine is certified to operate on unleaded gasoline. Unleaded gasoline produces fewer engine and spark plug deposits and extends exhaust system life.
  • Page 9 05/12/16 15:00:32 32Z6J600_009 Oil Level Check Check the engine oil level before each use, or every 10 hours if operated continuously. Check the engine oil level with the engine stopped and in a level position. Remove the oil filler cap/dipstick and wipe it clean. Insert and remove the oil filler cap/dipstick without screwing it into the oil filler neck, then remove it to check the oil level shown on the dipstick.
  • Page 10 05/12/16 15:00:48 32Z6J600_010 AIR CLEANER A dirty air cleaner will restrict air flow to the carburetor, reducing engine performance. If you operate the engine in very dusty areas, clean the air filter element more often than specified in the MAINTENANCE SCHEDULE. Operating the engine without an air filter element, or with a damaged air filter element, will allow dirt to enter the engine, causing rapid engine wear.
  • Page 11: Spark Plug

    05/12/16 15:01:11 32Z6J600_011 SPARK PLUG Recommended Spark Plug: CM5H (NGK) CMR5H (NGK) The recommended spark plug is the correct heat range for normal engine operating temperatures. An incorrect spark plug can cause engine damage. For good performance, the spark plug must be properly gapped and free of deposits.
  • Page 12 05/12/16 20:37:16 32Z6J600_012 FUEL FILTER AND FUEL TANK Fuel filter inspection and Fuel tank cleaning Gasoline is highly flammable and explosive, and you can be burned or seriously injured when handling fuel. Stop engine and keep heat, sparks, and flame away. Handle fuel only outdoors.
  • Page 13: Spark Arrester Cleaning/Inspection

    05/12/19 14:39:29 32Z6J600_013 Tiller type Spark Arrester Removal Loosen the 5 mm hex bolt, then remove the top cover (see page Remove the 3 × 6 mm self-tapping screws from the spark arrester, and remove the spark arrester from the muffler. ×...
  • Page 14 05/12/16 15:02:07 32Z6J600_014 Tiller type: Spark Arrester Removal Loosen the 5 mm hex bolt, then remove the top cover (see page Remove the 4 × 6 mm self-tapping screws from the spark arrester, and remove the spark arrester from the muffler. MUFFLER SPARK ARRESTER ×...
  • Page 15 05/12/16 15:02:29 32Z6J600_015 Draining the Fuel Tank and Carburetor Gasoline is highly flammable and explosive, and you can be burned or seriously injured when handling fuel. Stop engine and keep heat, sparks, and flame away. Handle fuel only outdoors. Wipe up spills immediately. Make sure the engine oil filler cap is tightened securely.
  • Page 16 05/12/16 15:02:48 32Z6J600_016 TAKING CARE OF UNEXPECTED PROBLEMS ENGINE WILL Possible Cause NOT START Check control Choke open. positions. Engine switch OFF.(on the equipment) Check fuel. Out of fuel. Bad fuel; engine stored without treating or draining gasoline, or refueled with bad gasoline.
  • Page 17 05/12/16 15:03:11 32Z6J600_017 Carburetor Modifications for High Altitude Operation At high altitude, the standard carburetor air-fuel mixture will be too rich. Performance will decrease, and fuel consumption will increase. A very rich mixture will also foul the spark plug and cause hard starting.
  • Page 18 05/12/19 14:40:01 32Z6J600_018 Maintenance Follow the maintenance schedule on page . Remember that this schedule is based on the assumption that your machine will be used for its designed purpose. Sustained high-load or high- temperature operation, or use in unusually wet or dusty conditions, will require more frequent service.
  • Page 19: Wiring Diagrams

    05/12/16 15:03:56 32Z6J600_019 Tuneup Specifications ITEM SPECIFICATION Spark plug gap 0.60 0.70 mm − (0.024 0.028 in) − Idle speed 3,100 200 rpm ± Valve clearance IN: 0.08 ± 0.02 mm (cold) EX: 0.11 ± 0.02 mm Other No other adjustments needed. specifications Quick Reference Information Fuel...
  • Page 20: Consumer Information

    05/12/16 15:04:22 32Z6J600_020 CONSUMER INFORMATION Distributor/Dealer Locator Information United States, Puerto Rico, and U.S. Virgin Islands: Call (800) 426-7701 or visit our website: www.honda-engines.com Canada: Call (888) 9HONDA9 or visit our website: www.honda.ca For European Area: visit our website: http://www.honda-engines-eu.com Customer Service Information Servicing dealership personnel are trained professionals.

This manual is also suitable for:

Gx25Gx35