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Yamaha 570 exciter..wont start or run when cold

I have a 99 yamaha 570 exciter snowmobile. I take it from the garage starts no long as i ride seems fine...bogs down if you take off slow almost stalls at times. If i let it set and its cold it wont start or is really hard starting. If i bring it in the garage let it get warm starts right at witts end????

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You need a richer mixture than normal in a cold engine. It sounds like your machine is too lean on the idle circuit. Turn the air screw in on each carb to richen it up. Also, verify the choke is working properly.

Posted on Dec 26, 2009

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