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post #1 of 8 Old 09-28-2009, 10:21 PM Thread Starter
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hello there cat people, haha. i have a 2009 m8 and sometimes when i start it the sled backfires and my local dealer said alot of cat backfire when starting them. i find this hard to believe but i was thinking that where it is new it has 6 kms on it maybe thats why it is backfiring! any help would be great. thanks alot!
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post #2 of 8 Old 09-28-2009, 11:31 PM
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Mine does it too. Especially after cruising at low throttle for a while (like the road back to the truck). When I shut it off and then restart it to load it in the trailer sometimes it'll backfire thru the exhaust. At times it can be VERY loud. Literally as loud as a shotgun. So annoying.
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post #3 of 8 Old 09-29-2009, 12:06 AM
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Hold on, backfiring is pretty normal, a "fart" after shutting it down, but a sled backfiring when you try to start it, that's a serious problem. Is it pulling the rope from you?

Explain a bit more in depth please.

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post #4 of 8 Old 09-29-2009, 07:20 AM Thread Starter
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it doesn't pull the pull cord out of my hands. it just burps mostly but sometimes it backfires, not too loud but still backfires. so now i pull like i'm trying to pull the house down and it usally starts pretty good. but my old ski-doo never backfires. and it makes me wonder!
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post #5 of 8 Old 09-29-2009, 10:13 AM
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Mine doesn't pull the cord back either. It just goes BANG right when it starts. I'm pretty sure it is loading up fuel in the pipe or can (or both) and is somehow igniting it. Stange how this is the only two stroke engine I've had that has done this before. Must be something unique about the exhaust port timing or who knows what.
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post #6 of 8 Old 09-29-2009, 08:55 PM
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sounds like timing, like stated, maybe try replacing the plugs and see what that does.
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post #7 of 8 Old 09-30-2009, 07:18 AM
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I have the same problem. It is just a load up of gas as stated above. If when you stop you let it idle down fully and run at idle for about a minute or so I find it does not backfire. If I pull up to the gas tank or the cabin and just hit the e stop button. Then when I go to start it back up is when it does it.

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post #8 of 8 Old 09-30-2009, 07:24 AM Thread Starter
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thats what i figured was going on just loading up. its just the old ski-doo doesn't do this and it doesn't make for and good feeling having your sled backfire when starting it. turns alot of heads and people start asking questions. i always let my machine idle for a min or so when i stop after a little ride its just this machine hasn't even hit the snow yet and its backfiring! i don't like it, but thats it i guess haha come on with the snow now and i'll be just fine!! thanks people.

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