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ultra 680 bogs after warms up, please help!

C
Mar 9, 2013
1
0
1
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Hey Guys,
First time on the site officially, but have read many of the threads in the past and picked-up some great info....

Anyways I grabbed a mint 96 ultra sp 680 (first polaris for me)
I just rip out to the Ice Hut with it for the most part, but would love to wind it out a bit to see what it will do.....
The problem is
It starts and runs perfectly for about a mile then drops the center cylinder
and bogs....
It still runs on two...If I turn it off and let it sit for a minute its fires up and runs great for a mile then drops the cylinder again
I checked compression its about 118 across all 3
There was a few new plugs with it and I have swapped and played with them
Any help is greatly appreciated
Thanks
John
 

retiredpop

Well-known member
Lifetime Membership
Jul 3, 2001
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Calgary
Hey John, I know this is way late but I would suspect the center coil if going open when it runs for a minute.
 
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