Too much gas going through the engine, then it will sit in the muffler and when it runs, it will back fire. Sounds like the carbs need to be cleaned, and the needle and seat should be checked out. Thats what it sounds like to me...
it has been very cold -0 and the last two rides I have gone on the machine bogged a little going up the hill from my house. I can get the engine to kick back in if I hold the lever to the wood, but then it backfires. I checked my plugs, the carbs were cleaned less than a month ago. Could it be the cold?
hey man, my 96 did the same thing, i don't know if your 97 is the same but i talke to the local dealer and all you have to do is unplug those connectors down by the carbs, there is one for each carb. Just unplug all 3 of them, the dealer said the only reason they're there is incase your carbs freeze up wide open, those things are suppose to stop that from happening, some are faulty and will cause it to backfire like mine did. At first i changed the plugs and cleaned that carbs, i was clueless, unplugged those and problem solved, if you don't want to unplug all 3 just unplug the one that's causing the backfire. Hope I could help.
i've had my sled backfire about 3 4 times this year ,,,,,,,every time she did that ,i'd change the plugs and the problem went away ,,,,,,i was actually told by a dealer that they recomend changing the plugs every 20 hours of ridding ,,,,,,,,,i thaught that was a little low ,,, but at a couple$ a plug ,, big deal right
yeah ,, i'm with you guys ,, cause i've used them for definatly over 20 hours and they still seemed good ,, but i know that whenever i'd have a backfire problem,, changing my plugs would solve that 100% of the time
(so far anyways ),,
but ya i think 20 hours is quite low ,, just wanted to know if any of you heard otherwise
i've come to the conclusion that NGK plugs are just junk!!! at least the resistor ones! they seem to fail on my xlt at random, for no good damn reason!!! i now they are cheap and i've learned to carry a handfull at all times, just seems odd that they go whenever and wherever they feel the need to!
A forum community dedicated to snowmobile owners and enthusiasts. Come join the discussion about performance, racing, troubleshooting, trails, maintenance, riding tips, modifications, classifieds, gear, and more!