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SMC 50cc two stroke quad starts but wont run

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Old Dec 9, 2017 | 09:31 AM
  #1  
Sieuwe Elferink's Avatar
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Default SMC 50cc two stroke quad starts but wont run

Hello

I have a 2 stroke SMC quad that only runs on brake cleaner. When i spray brake cleaner into the carb it will fire right up but when the break cleaner runs out the engine immediately stalls. Obviously this sounds like a fuel problem. But i have cleaned the carb 10 times and even tried a different carb and had exactly the same thing. I have also tried new fuel from a separate clean tank i had laying around. The spark from the bogie also seems ok.

Hope someone can help

Greetings Sieuwe
 
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Old Dec 9, 2017 | 06:32 PM
  #2  
old polaris tech's Avatar
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Getting fuel to the carb(that's been cleaned and then swapped out with another one) has good spark from the "bogie" what ever that may be.. Sounds like you're down to a compression test.If it's at least 95-100 psi it should be able to start and run.Anything lower may be the problem.Just comparing compression to a Polaris 50 2 stroke,the minimum compression shows 115 psi per the manual.Plus leaking crank seals can be another problem also that many people overlook.
 
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Old Dec 9, 2017 | 10:25 PM
  #3  
user493's Avatar
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From: Michigan
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That bogie thing had me confused too. Once upon a time snowmobiles had bogie wheels, but I have no idea what part of an ATV would be a bogie, and why it would have a spark or not.
 
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