1993 ext 550 Running rich - HCS Snowmobile Forums

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Old 01-20-2020, 07:42 PM   #1 (permalink)
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Default 1993 ext 550 Running rich

So just picked this up seems to be running rich and smoking a lot Ideas ?
Also missing every once and a while

Hasn't been ran a lot in the last couple of years

Thanks
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Old 01-20-2020, 07:45 PM   #2 (permalink)
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Need more info.

Maybe pressure test needles and seats.
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Old 01-20-2020, 07:47 PM   #3 (permalink)
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Should have mentioned it is EFI
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Old 01-20-2020, 10:23 PM   #4 (permalink)
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Ooooo. That was an early, sort of troublesome, EFI system. Even when they were new, it was important to keep all of the Ground wires clean. Start there. Remove, shine them up, lubricate. Inspect inside of fuel tank for crap, change filter, hoses may be dirty/shot too. .
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