Small engine ???

Discussion in 'Old's Cool' started by txhardcore, Oct 13, 2005.

  1. txhardcore

    txhardcore KLR A-11

    Joined:
    Sep 11, 2002
    Oddometer:
    6,755
    Location:
    Texas
    This isnt an mc but I figure yall can field it! I have a 20 hp Honda 4stroke that starts perfectly and runs at idle perfectly. Th problem is when I give it throttle it dies. To stop this I pull out the choke and it runs ,surges a little but runs pretty well. If I have the choke on at idle after start it dies. I am guessing it is starving for gas. The filter is fine and it is getting gas to the carb. What could cause this?
    :scratch
    #1
  2. Cauldron

    Cauldron Now in DESMODROMIC!

    Joined:
    Apr 23, 2004
    Oddometer:
    2,939
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    Chaingolia
    Sounds like something (krud) is blocking a secondary port in the carb. I don't know what kind of carb you have, but if it has any type of secondary port, that would be my guess.


    Idle circuit
    primary circuit
    secondary circuit

    Blast it with some b12 carb cleaner (off the engine)
    #2
  3. txhardcore

    txhardcore KLR A-11

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    I'll give it a try! Thanks!
    #3
  4. G-Force Junkie

    G-Force Junkie Long timer

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    Yup, its running lean on the top end. Clean out the carb paying attentin to the jets ond orifices. Also, look for air leaks from cracks, dried up orings, etc on the carb to head manifold. It may be sucking air at higher RPM's.
    #4
  5. txhardcore

    txhardcore KLR A-11

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    Thanks! I'm gonna hafta tear it down I guess. :cry
    #5
  6. txhardcore

    txhardcore KLR A-11

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    Broke down the carb today and cleaned it. Checked all gaskets to intake and carb. Runs great now! Thanks guys! :freaky
    #6
  7. frewhl

    frewhl daily rider

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    Jan 10, 2002
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    8,727
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    gulf region
    is it a scooter?
    #7
  8. txhardcore

    txhardcore KLR A-11

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    Sep 11, 2002
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    6,755
    Location:
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    Nope. It's a motor to an adventure boat! :1drink
    <img src="http://www.fisherbeavertail.com/images/products/lg_20HP.gif">
    #8