1987 Ski Doo Safari 377 Bogging Down

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skutr

New member
My 87 ski doo safari 377 bogs down when run at wide open throttle. It's ok at 1/2 or 3/4 throttle but acts like its fouling plugs at wide open throttle. If I let it sit for a while it idles and runs great until I run it wide open for about a1/2 mile and then starts to bog, cough, spit, sputter and dies.

I checked the plugs and they look great (light cardboard or caramel color) but I changed them anyway. The sled only has a primer and no choke. I thought the primer may be bad and the engine siphoning gas through the primer so I pinched it off with a forceps. I also dropped the needle one notch thinking that the needle was letting to much gas through.

I haven't cleaned the carburetor yet but I'm starting to think that the float might be sticking.

Thoughts? Is there anything else I'm missing?

Thanks,
Skutr
 
D

Dsbasecamp

New member
At idle spray some wd40 around the crankcase seals to rule them out ... A bad shifting clutch will act the same ...
 
S

snake

Member
air box or exhaust clogged? also make sure exhaust outlet pipe is thru the pan and not bent partially closed from an impact with something like a rock
 
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HardwaterHoosier

Member
10:1 it's the crank seals. use starting fluid instead of wd-40. You still might not hear a rev, at a higher load a weak seal will pull more air- hard to duplicate that in the garage.
 
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