Honda GXV340 Operating And Maintenance Manual
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Honda GXV340 Operating And Maintenance Manual

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See also: Owner's Manual
Thank you for purchasing a Honda engine.
This manual covers the operation and maintenance of your engine:
GXV340 GXV390
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 it if it is resold.
Illustrations herein are mainly based on:
GXV340
Pay special attention to statements preceded by the following
words:
Indicates a strong possibility of severe personal
injury or death if instructions are not followed.
Indicates a possibility of personal injury or equipment
damage if instructions are not followed.
Indicates that equipment or property damage can
result if instructions are not followed.
Gives helpful information.
If a problem should arise, or if you have any questions about your
engine, consult an authorized Honda dealer.
The Honda engine is designed to give safe and dependable service
if operated according to instructions. Read and understand the
Owner's Manual before operating the engine. Failure to do so
could result in personal injury or equipment damage.
2

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  • Page 1 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.

  • Page 2: Safety Instructions

    SAFETY INSTRUCTIONS To ensure safe operation Honda engine is designed to give safe and dependable service if operated according to instructions. Read and understand the Owner’s Manual before operating the engine. Failure to do so could result in personal injury or equipment damage.

  • Page 3: Safety Label Location

    SAFETY LABEL LOCATION 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. READ OWNER’S MANUAL...

  • Page 4: Component Identification

    COMPONENT IDENTIFICATION RECOIL STARTER STARTER GRIP FUEL TANK CAP GXV390 SPARK PLUG FUEL TANK OIL ALERT BUZZER AIR CLEANER (Oil alert type only)
  • Page 5 OIL FILLER CAP CONTROL LEVER SERIAL NUMBER MUFFLER AND ENGINE TYPE OIL DRAIN PLUG ELECTRIC STARTER (Where equipped)
  • Page 6 BATTERY CONNECTIONS (where equipped) Use a 12 volt battery with an ampere-hour rating of at least 18 AH. Connect the battery positive ( ) cable to the starter solenoid terminal, as shown. Connect the battery negative ( ) cable to an engine mounting bolt, frame bolt, or other good engine ground connection.

  • Page 7: Pre-Operation Check

    Non-detergent oils and vegetable oils are not recommended. Be sure to check the engine on a level surface with the engine stopped. Use Honda 4-stroke, or an equivalent high detergent, premium quality mo- tor oil certified to meet or exceed U.S. automobile manufacturer’s require- ments for service classification SG, SF.

  • Page 8: Paper Element

    Check the air cleaner element. Check the air cleaner elements for dirt or obstruction of elements. Clean or replace the elements it necessary (P. AIR FILTER GROMMET PAPER ELEMENT FORM ELEMENT...
  • Page 9 Check the fuel level. Use automotive unleaded gasoline with a Research Octane Number of 91 or higher (a Pump Octane Number of 86 or higher). Never use stale or contaminated gasoline or an oil/gasoline mixture. Avoid getting dirt or water in the fuel tank. Gasoline is extremely flammable and is explosive under certain conditions.

  • Page 10: Gasolines Containing Alcohol

    If you decide to use a gasoline containing alcohol (gasohol), be sure it’s octane rating is at least as high as that recommended by Honda. There are two types of ‘‘gasohol’’: one containing ethanol, and the other containing methanol. Do not use gasohol that contains more than 10% ethanol.

  • Page 11: Starting The Engine

    STARTING THE ENGINE Turn the fuel valve to the ON position. FUEL VALVE Move the control lever to the CHOKE position. If the engine is warm or the air temperature is high, open the choke lever as soon as the engine starts. CONTROL LEVER CHOKE...
  • Page 12 With recoil starter: Pull the starter grip lightly until resistance is felt, then pull briskly. Do not allow the starter grip to snap back against the engine. Return it gently to prevent damage to the starter.
  • Page 13 High altitude performance can be improved by specific modifica- tions to the carburetor. If you always operate the engine at altitudes higher than 1,500 m (5,000 feet) above sea level, have your authorized Honda dealer perform these carburetor modifi- cations. Even with suitable carburetor jetting, engine horsepower will decrease approximately 3.5% for each 300 m (1,000 feet) increase...

  • Page 14: Operation

    OPERATION When the engine warms up, move the control lever to FAST or SLOW. CONTROL LEVER Oil ALERT BUZZER (oil alert type only) The ‘‘OIL ALERT’’ buzzer will warn you when the engine oil needs to be added to the crankcase. Running the engine with insufficient oil can cause serious engine damage.

  • Page 15: Stopping The Engine

    STOPPING THE ENGINE Move the control lever to the STOP position. CONTROL LEVER STOP Turn the fuel valve to the OFF position. FUEL VALVE...

  • Page 16: Maintenance Schedule

    Use only genuine Honda parts or their equivalent. The use of replacement parts which are not of equivalent quality may damage the engine.

  • Page 17: Drain Plug

    Oil change Drain the oil while the engine is still warm to assure rapid and complete draining. Remove the oil filler cap and drain plug to drain the oil. Refill with the recommended oil (see page ) and check the oil level.
  • Page 18 Air cleaner service A dirty air cleaner will restrict air flow to the carburetor. To prevent carburetor malfunction, service the air cleaner regularly. Service more frequently when operating the engine in extremely dusty areas. Never use gasoline or low flash point solvents for cleaning the air cleaner element.
  • Page 19 Paper element: Tap the element lightly several times on a hard surface to remove excess dirt, or blow compressed air through the filter from the inside out. Never try to brush the dirt off; brushing will force dirt into the fibers. Replace the paper ele- ment if it is excessively dirty.
  • Page 20 Spark plug service Recommended spark plug: BPR5ES (NGK) To ensure proper engine operation, the spark plug must be properly gapped and free of deposits. Remove the spark plug cap and use the proper size spark plug wrench to remove the spark plug. If the engine has been running, the muffler will be very hot.
  • Page 21 Measure the plug gap with a feeler gauge. Correct as necessary by bending the side electrode. The gap should be: 0.70 0.80 mm (0.028 0.031 in) 0.70 0.80 mm (0.028 0.031 in) Check that the spark plug washer is in good condition and thread the spark plug in by hand to prevent cross-threading.
  • Page 22 When installing a new spark plug, tighten 1/2 turn after the spark plug seats to compress the washer. When reinstalling a used spark plug, tighten 1/8 1/4 turn after the spark plug seats to compress the washer. The spark plug must be securely tightened. An improperly tightened spark plug can become very hot and may damage the engine.
  • Page 23 Spark arrester maintenance (optional part) If the engine has been running, the muffler will be very hot. Allow it to cool before proceeding. The spark arrester must be serviced every 100 hours to maintain its efficiency. Remove the three 5 mm screws and remove the muffler protec- tor.

  • Page 24: Muffler Protector

    Check for carbon deposits around the exhaust port and the spark arrester, and clean if necessary. The spark arrester must be free of breaks and holes. Replace, if necessary. Install the spark arrester and the muffler in the reverse order of disassembly.

  • Page 25: Remote Control Cable

    REMOTE CONTROL CABLE The control lever is provided with a hole for cable attachment. Install a solid wire cable as shown below. Do not use braided wire cable. DRAIN SCREW 5 x 16 mm BOLT SOLID WIRE CABLE...
  • Page 26 TRANSPORTING/STORAGE When transporting the engine, turn the fuel valve OFF and keep the engine level to prevent fuel spillage. Fuel vapor or spilled fuel may ignite. Before storing the unit for an extended period; Be sure the storage area is free of excessive humidity and dust. Drain the fuel tank and carburetor into a suitable gasoline container.
  • Page 27 Pull the starter rope until it becomes hard to pull. This closes the valves, and protects them from dust and corrosion. Cover the engine to keep out dust.

  • Page 28: Troubleshooting

    With starter motor: Is the battery electrolyte level up to the upper level? Is the battery fully charged? Is the spark plug in good condition? (page 21) If the engine still does not start, take the engine to a Honda engine dealer.

  • Page 29: Specifications

    SPECIFICATIONS Dimensions GXV340 Length 433 mm (17.0 in) Width 382 mm (15.0 in) Height 406 mm (16.0 in) Dry weight 31 kg (68 lbs) Engine Engine type 4-stroke, overhead valve, 1 cylinder Displacement 337 cm (20.6 cu-in) Bore Stroke 82 x 64 mm (3.2 x 2.5 in) Max.
  • Page 30 Dimensions GXV390 Length 433 mm (17.0 in) Width 382 mm (15.0 in) Height 406 mm (16.0 in) Dry weight 32 kg (71 lbs) Engine Engine type 4-stroke, overhead valve, 1 cylinder Displacement 389 cm (23.7 cu-in) Bore Stroke 88 x 64 mm (3.5 x 2.5 in) Max.
  • Page 31 GXV340 GXV390 ENGINE TYPE SERIAL NUMBER OWNER’S MANUAL GXV340T2, GXV390T1 32Z1E600 Honda Motor Co., Ltd. 2004 00X32-Z1E-6000...

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Gxv390

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