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  1. #1
    TuningForkMarine's Avatar
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    XL800 throttle issue

    hey dudes, i just picked up a hell of a steal for a few hundred bucks, guy thought it was a bad starter, put a new battery in and it started right up . BUT this 800 (66E) motor has an issue ive never run in to before... when you use the choke, it accelerates freely, but, the throttle is non responsive. squeeze it all day long you will not get that thing to accelerate or raise any RPM ... has anyone ever run in to this issue before?


  2. #2
    powerstroke specialist mikegp's Avatar
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    can you look past the exhaust and see if the wheel turn as you give throttle? also if the rod still connected from one carb to the other.
    it sounds like you have some sort of air or fuel restriction.

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    TuningForkMarine's Avatar
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    i actually removed the exhaust and it seems like the cable moves back and forth and so does the lever on the carbs

  4. #4
    powerstroke specialist mikegp's Avatar
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    Quote Originally Posted by bystrov View Post
    i actually removed the exhaust and it seems like the cable moves back and forth and so does the lever on the carbs
    it sounds like its starving , check for restrictions.

  5. #5
    powerstroke specialist mikegp's Avatar
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    if i best remember long time ago a had a similar issue with a xl , and i find out that the fuel pump diaphragm was bad on both carbs.
    just go over the carbs and see.

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  7. #6
    TuningForkMarine's Avatar
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    does the rebuild kit usually come with diaphragm?

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    Quote Originally Posted by mikegp View Post
    ...can you look past the exhaust and see if the wheel turn as you give throttle?
    Do you actually see the wheel on the carburetor turning as you pull the throttle?

    It does not sound as if your cables are attached properly.

  9. #8
    TuningForkMarine's Avatar
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    Quote Originally Posted by salty View Post
    Quote Originally Posted by mikegp View Post
    ...can you look past the exhaust and see if the wheel turn as you give throttle?
    Do you actually see the wheel on the carburetor turning as you pull the throttle?

    It does not sound as if your cables are attached properly.
    yea the wheel turns. im thinking a air leak in fuel

  10. #9
    powerstroke specialist mikegp's Avatar
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    Quote Originally Posted by bystrov View Post
    does the rebuild kit usually come with diaphragm?
    yes they do, go with oem. mikuni
    the key part on every carb engine , are the carbs.

  11. #10
    showmepro1200's Avatar
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    Quote Originally Posted by bystrov View Post
    hey dudes, i just picked up a hell of a steal for a few hundred bucks, guy thought it was a bad starter, put a new battery in and it started right up . BUT this 800 (66E) motor has an issue ive never run in to before... when you use the choke, it accelerates freely, but, the throttle is non responsive. squeeze it all day long you will not get that thing to accelerate or raise any RPM ... has anyone ever run in to this issue before?
    Define "when you use the choke". This is gonna be way out there on realm of possibilities, but has someone hooked the choke cable to where the throttle cable goes, and throttle cable where the choke cable goes? I don't even know if that mistake can be made (if cables can reach) but just throwing it out there....I haven't had all my coffee yet this morning

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