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Old 03-02-2007, 06:04 PM   #1 (permalink)
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Old question
Quote:
2000 A/C ZR 500

After riding my snowmobile for about an hour, and then stopping it... the snowmobile backfires if I try and start it back up again...and it's scaring children

What to do?
Is this normal?[/b]
New Question:
How can I fix my idle? When I stop the snowmobile it hovers at 3k rpm and then after a few mins it drops down to 1500... what's happening?
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Old 03-02-2007, 07:17 PM   #2 (permalink)
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let it idle down before you shut it off
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Old 03-02-2007, 07:24 PM   #3 (permalink)
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Quote:
2000 A/C ZR 500

After riding my snowmobile for about an hour, and then stopping it... the snowmobile backfires if I try and start it back up again...and it's scaring children

What to do?
Is this normal?[/b]
my friend has the same sled and the same problem, I think the fuel injecters make the mixture too rich on that sled
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Old 03-02-2007, 07:56 PM   #4 (permalink)
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i always thought that too lean would make your sled pop upon startup....
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Old 03-02-2007, 11:13 PM   #5 (permalink)
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Carb sled................set your base / warm idle slightly under 1500 RPM, makes em drop much faster.
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Old 03-03-2007, 12:28 AM   #6 (permalink)
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i always thought that too lean would make your sled pop upon startup....[/b]
oh it's when you start it, my mistake, I thought you meant immediately after you kill it
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Old 03-03-2007, 07:33 AM   #7 (permalink)
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My 600 will do the same thing if I don't let it idle down. I've read about many simptoms that can make the idle stay high and then come down. I'd try lowering the idle first as mentioned above, since it's the easiest and quickest thing to try. Make sure you don't have any air leaks in your carb boots too.
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Old 03-03-2007, 08:08 AM   #8 (permalink)
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Let the sled return to a idle speed (1500 rpm) then shut it off!!!
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Old 03-03-2007, 12:41 PM   #9 (permalink)
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Quote:
Carb sled................set your base / warm idle slightly under 1500 RPM, makes em drop much faster.[/b]
I had the same hangup idle at 3000rpm, I made sure both carb idle screws were set the same, I found that one carb was idleing slightly higher than the other one, I got them so they are burning the same at idle, now when I come to a stop, NO 3000 rpm hang up, comes right down to 1800rpm

Make sure your air screws are set correctly also.
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