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  1. #1

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    Aug 2009
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    Polaris sl900 carb

    I am having a fuel problem with a 1997 Polaris SL900. The carbs have Been rebuilt and set at factory setting at 5/8 turn out. When running I must choke it in order to get to full rpm it then runs great. When letting of the throttle I again have to choke it slightly to get up to speed. I was wondering if altitude would have an affect on the carb settings I am at 6500 feet


  2. #2
    6500 feet is pretty high. Are you on vacation from your usual altitude and this is a new condition? If so I would think it would be running rich, not lean. Choke would make it worse. I doubt that would be what is causing it. Restricted fuel flow, carb restrictions or even an intake leak would give you your symptoms. Humble opinion.

  3. #3

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    Quote Originally Posted by DrDan View Post
    6500 feet is pretty high. Are you on vacation from your usual altitude and this is a new condition? If so I would think it would be running rich, not lean. Choke would make it worse. I doubt that would be what is causing it. Restricted fuel flow, carb restrictions or even an intake leak would give you your symptoms. Humble opinion.
    Could a faulty accelerator pp cause this

  4. #4
    MSX 150 guy lives on Mr. GP1800's Avatar
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    Quote Originally Posted by sly4tahoe View Post
    Quote Originally Posted by DrDan View Post
    6500 feet is pretty high. Are you on vacation from your usual altitude and this is a new condition? If so I would think it would be running rich, not lean. Choke would make it worse. I doubt that would be what is causing it. Restricted fuel flow, carb restrictions or even an intake leak would give you your symptoms. Humble opinion.
    Could a faulty accelerator pp cause this
    Yes

  5. #5

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    Aug 2009
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    Island park Idaho, Boulder city,Nv
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    Thanks for your reply upon further investigation I find that the carbs need to be set up to 1 full turn above 5000' per the Polaris shop manual. I have set them up and will putting the ski in the water this afternoon

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