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thanks for your concern we have not yet gotten the snowmobile but we are picking it up tommorow. we are getting it from a dealer in CT. for 700 dollars. he said a man came in complaining of it running rich and it seemed like it had too much backpressure. The man put a new set of plugs, a new fuel pump a.d i believe he rebuilt the engine. It starts right up revs up fine but we have no idea what is wrong. it has the stock jetting in it also.
Thanks again