GX35 gas issue

Discussion in '4-Stroke Engines' started by jucasan, Jun 2, 2012.

  1. jucasan

    jucasan New Member

    How can I check the fuel line is properly working?
    Seems like there is no gas in the combustion chamber.

  2. Old Bob

    Old Bob Member

    Pump the air purge bulb on the bottom of the carburetor a few times and see if there is gas flowing back to the tank in the clear return line.
  3. jucasan

    jucasan New Member

    There is gas in the bulb and there is gas flowing back to the tank. But still wonder if the mix air/gas make it to the combustion chamber.
  4. darwin

    darwin Well-Known Member

    Whats the motor doing to make you think that OP? How many miles on it aprox? Is the air filter dirty? Have you messed with any adjustments?
  5. jucasan

    jucasan New Member

    Is not too old, 1-1/2 y maybe. Filter is clean, new spark plug.
    With the throttle fully open the engine start for a few sec, then stops. that make me wonder that probably there is no enough air/gas going to the combustion chamber. When I try to start the engine with the choke on, don't see any fuel in the spark plug.
  6. darwin

    darwin Well-Known Member

    I'll assume spark isn't your issue because you say its starts and REVs up then dies. Check your fuel hoses for cracks, next I would make sure your carb bolts are tight. If that doesn't do it the carb would be my next look. Could be trash in there or the diaphram has a problem. Are you sure its not under warranty? Soobies carry a 3 year warranty, not sure what a honda carries. The gas cap should be venting properly too. Just some ideas others will chime in.
  7. Old Bob

    Old Bob Member

    You shouldn't see gas on the plug, if its wet its flooded.Its probably a bad diaphragm and no its not covered under warrenty as its a wear item and the engine warrenty is voided the minute it goes on a bike.
  8. perilous

    perilous Member

  9. Silvaire

    Silvaire Member

    This carburetor offered on eBay might work on a Honda GX35, but it is not a genuine replacement part.

    The issue the OP posted is almost certainly a carburetor issue though. Because of the fuel we have to use, sitting for even a short time can cause damage to the delicate rubber parts in these carburetors.

    See post #65 in the following thread:


    A correction to the parts source I listed there:
    It is mowers4u.com, NOT mower4u.com
  10. Old Bob

    Old Bob Member

    diaphragms are less than 10 bucks
  11. darwin

    darwin Well-Known Member

    Who says it come off of a bike, it came off of a water pump best I can remember.
  12. Old Bob

    Old Bob Member

    You can attempt warrenty fraud of you want to, but diaphragms aren't covered.
  13. Silvaire

    Silvaire Member


    Please post a link or quote stating that diaphragms aren't covered under warranty on Honda's utility engines.
  14. Old Bob

    Old Bob Member

    I worked with a dealer/rental outlet in the service dept for several years.
    I traded my time for free parts for my R&D projects and access to factory service information.
    Diaphragms are a replacement part.I serviced engines made by every major manufacturer no one covers replacement parts.

    Diaphragms are cheap and take 5 min with only a screw driver needed to replace them, I don't see what the big issue is.

    Following is warrenty information if you need further information contact information is supplied at the bottom so you can embarass yourself with Honda directly.



    Warranty conditions - Exclusions

    The following items are disallowed from coverage by the warranty

    1. Common

    A. Any damage which results from neglect of the periodic maintenance specified by Honda.

    B. Any damage which results from repair or maintenance operations by methods other than specified by Honda.

    C. Any product which has participated in a racing event, rally or competition.

    D. Any damage which results from misuse or use beyond the limitations or the intended purpose specified by Honda, such as overloading, or any damage due to use under abnormal conditions.

    E. Any damage which results from use of non-genuine parts, lubricant or fluid not approved by Honda.

    F. Any damage resulting from modification or installation in other products in a way not approved by Honda which has any influence on the function and/or performance of the products.

    G. Any damage which results from operation other than specified in the Owner's Manual, either intentionally or by error.

    H. Fading of painted surfaces, deterioration of plated surfaces, deterioration of rubber and plastics, and rusting due to the passage of time.

    I. Normal phenomena such as noise, vibration or oil seepage which are considered by Honda as not affecting the quality, function or performance of the product.

    J. Any damage due to improper storage or transport.

    K. Expendable replacement items.

    Carburetor diaphragms are considered an expendable replacement item

    Expendable replacement parts: Spark plugs, contact points, shear pins, fuel strainers, oil filter elements, air cleaner elements, brake shoes, clutch discs, fuses, motor brushes, gaskets, packings, tubes, belts.
    Petroleum products and others: Oil, grease, battery electrolyte, radiator coolant. Other items specified by Honda.
    L. Periodical maintenance items such as cleaning, inspection and adjustments.

    M. Any repair and/or adjustment performed by persons other than a distributor or his authorised dealers, or damage resulting therefrom. As a rule, warranty shall not be applied to repair or adjustment performed by persons other than a distributor or his authorised dealers. However, in case of an unavoidable emergency, repair or adjustment may be carried out by other persons and, when judged by the distributor. as being proper, the distributor will be compensated for the cost of adjustment in accordance with the procedure for a normal warranty claim if the claim is approved by Honda.

    N. Any repair and/or adjustment to correct improper or poor quality work previously performed.

    O. Incidental expenses incurred in the warranty claim.


    Additional expenses such as those for towing, communications, hotel and meals, etc., incurred due to breakdown of the product at a remote location.
    Any expense related to personal injury and/or property damage (exclusive of the product itself).
    Compensation for time loss, commercial losses or rental costs of a substitute product during the period of adjustment.
    P. Any damage which results from unavoidable natural disasters, fire, collision, theft, etc.

    Q. Any normal wear or deterioration, such as that of sliding and/or rotating parts caused under normal operating conditions. Examples o Normal wear to pistons, piston rings, cylinders, piston pins, valve seats, stems and bearings.

    R. Any trouble or damage caused by soot, smoke medicines chemicals salt or the like.

    2. Engines

    A. Any defect on Engines caused by improper installation in other products.


    Any damage resulting from vibration caused by improper installation.
    Any defect caused by mishandling and/or incorrect matching of the OEM engine and product in which it is installed as described in the OEM Technical Manual for OEM engines.
    B. Any expense related to installation or removal of OEM engine from product in which it is installed for repair.

    C. Normal expendable replacement parts:


    Spark plugs, contact points, shear pins, fuel strainers, air cleaner elements, oil filter elements, starter motor brushes, gaskets, packings, V-belts.
    D. Any defect caused by improper maintenance and/or use.


    Bend or break in the crankshaft caused by external shock.
    Any defect caused by use other than specified by Honda.
    Malfunctioning engine due to use of improper fuel. .
    Cylinder seizure caused by overheat.
    E. The injection nozzle of a diesel engine (including tip), of which the warranty period is one year except for the following countries.


    In countries where the warranty period granted to the distributor for the product is less than one year, the warranty period so specified shall take precedence.

    F. Any cost or damage resulting from overhaul of any sealed units or parts which Honda instructs should not be disassembled


    Sealing of the governor
    Sealing of the engine stop lever disassembling the injection pump/nozzle
    G. Others correspond to the common category of exclusions

    Copyright, 2012 , Honda All rights reserved.

    I worked with a dealer/rental outlet in the service dept for several years.Diaphragms are a replacement part.


    When you write or call, please provide this information:
    Equipment manufacturer's name and model number that the
    engine is mounted on
    Name of dealer who sold the engine to you
    Name, address, and contact person of the dealer who services
    your engine
    Date of purchase
    Your name, address and telephone number
    A detailed description of the problem

    Power Equipment Division
    Customer Relations Office
    4900 Marconi Drive
    Alpharetta, GA 30005-8847
    Last edited by a moderator: Dec 15, 2015
  15. Silvaire

    Silvaire Member

    That's a lot of information there Bob.

    But other than the subjective comment YOU added: "Carburetor diaphragms are considered an expendable replacement item",
    I don't see anything there that would specifically preclude one from legitimately asking for warranty service because of the issue that the OP posted. I certainly don't see how doing so would be to "attempt warrenty fraud" as you stated.

    I have replaced enough gasket/diaphragm sets to know that these rubber parts are THE weak link in small engine fuel systems that use diaphragm carbs. If engine manufactures cannot source or build carburetors that will hold up in the typical environments that these engines are sold to be used in (in specific terms, the crappy standard pump gas we have to use) they shouldn't they be obligated to service them under warranty?
  16. Old Bob

    Old Bob Member

    Wear items are not covered, diaphragms are not covered, we never replaced them under warrenty.If the carburetor was defective due to manufacturing defects then it could be replaced under warrenty.

    Claiming the engine was used on a water pump when its actually a bike engine is fraud.The dealer will simply plug in the serial number to the data base and know instantly what it was used on.After a year and half as the owner stated chances are its already outside of the warrenty period.

    The carburetors themselves hold up fine even with high alcohol content, its the rubber parts that suffer, provided the engine is used,stored and maintained under the guide lines set forth in the owners manual the parts will last a long time.Its not the manufacturers responsibility to maintain equipment or ensure the proper fuel is used, it is up to the owner. If the owner fails to follow set guide lines then the issue is due to owner neglect therefore the manufacturer is not at fault.
    Again its a known expendable and not covered.

    All this is moot because of how the engine is being used.

    But you can take it to the dealer, they have the right to a judgment call on the repair and if you don't like it you can go to the district distributor and from there contact Honda Consumer relations.
    Go argue with them, you won't get anywhere.
  17. rawly old

    rawly old Member

    I'll say this from experience, don't buy the so called replacement
    carbs off Ebay. You may as well just set fire to your money.
  18. jucasan

    jucasan New Member

    Anybody has a PDF gx35 shop manual?
  19. Old Bob

    Old Bob Member

  20. darwin

    darwin Well-Known Member

    securedownload.jpg securedownload.jpg Honda gx35 carb
    Last edited: Nov 13, 2012