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VM32 Carb issues Arctic Cat 440

Tuning/Tech/Articles

 
 
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  #1  
Old 01-10-2009
440odessey
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Default VM32 Carb issues Arctic Cat 440

Need help, dissasembled and cleaned both carbs about ten times but still only running on one cylinder other plug gets wet right away if i swap carbs it changes which side is fouling out so it must be a carb issue right? Not sure what i might have missed the carb that keeps fouling out the plug right away never changes no matter how i adjust it? Is this normal, do they only run on one cylinder until the engine rev's up? I completely dissasembled the carbs, soaked them and blew out all the passageways and jets ect. in the carbs still no difference . The engine is an arctic cat 440 liquid cooled not sure the year but it says sprint on the cover
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  #2  
Old 01-10-2009
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That's "Spirit", not sprint.

It would seem that you have two options here.
One is that the choke plunger on that carb is not sealing or sticking open.
The other is that the float valve is not cutting off the flow once the level in the bowl gets high enough, hence the flooding.

Check the valve needle tip for wear and replace needle and seat if needed.
Also a good idea to check that the floats are not gas logged (not floating) or that they are adjusted properly.
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  #3  
Old 01-10-2009
440odessey
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Quote:
Originally Posted by OCR View Post
That's "Spirit", not sprint.

It would seem that you have two options here.
One is that the choke plunger on that carb is not sealing or sticking open.
The other is that the float valve is not cutting off the flow once the level in the bowl gets high enough, hence the flooding.

Check the valve needle tip for wear and replace needle and seat if needed.
Also a good idea to check that the floats are not gas logged (not floating) or that they are adjusted properly.
Okay i will check those things out, the reason i dont know the year is because the motor is in a honda oddesey go cart that i am building, i have two of them the other one has a 398cc kawasaki sled motor but it runs fine!
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Old 01-10-2009
Polaris1man
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What OCR says about the float height
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  #5  
Old 01-10-2009
440odessey
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Quote:
Originally Posted by Polaris1man View Post
What OCR says about the float height
Its not the float, i checked that out already! I think it might be what he said about the chokes, both of them are stuck in the carbs, wont move, any ideas on how to get them unstuck? I already had both carbs off and soaked them in kearosene a few times but they never loosened up? I thought they were just held in by a clip or something! The crazy thing is the other carb works just fine even with the choke frozen, its just that one carb?
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  #6  
Old 01-11-2009
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If you can't get the out you can drill them and use an easy-out, or run a self tapping screw in so that you have something to get a hold of.
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