Hey guys, I got a Indy Ultra Touring that hasn't been running right for the last year and a half. I am trying to get it running properly before the first snowfall here in MN.. I have a buddy that is pretty mechanically inclined on snowmobiles but I would like some second opinions on what the issue may be. The engine seems to only run off 2 cylinders, backfires out the exhaust, Sled gets really bad MPG (around 6) and is really boggy until it hits around 4k RPMS, then sounds how it should and all 3 are running.We went through all the carbs and had them cleaned, Done a compression test on all 3 cylinders which all were normal so now we are pretty sure it is something electrical. We metered out the Stator and its reading normal so my friend thinks it is the CDI box. He apparently had a similar issue couple years back with on of his sleds and it was backfiring and running on 1 cylinder out of the 2 it has. Tried basically everything and decided to try a new CDI box so he put one in and runs great with no issues.. I just want to know what anyone else thinks because a lot of people seem to say a CDI either works or it doesn't. Hopefully will get a CDI within the week and that fixes the issue.
Polaris Ultra Touring not running on all 3 cylinders / backfiring.
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