Engine reverse stalling - HCS Snowmobile Forums


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Old 04-15-2017, 02:00 PM   #1 (permalink)
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Default Engine reverse stalling

Has anyone ever had trouble with their engine reverse, and the motor stalling? We are having trouble with a 2010 F8 with the 800 HO. We have checked the wiring harness everywhere and swapped ECUs with a 2015. The stater and ignition pick up coil's ohm within spec. It runs fine otherwise. Where else should we look? It's stalls kicking into reverse and kicking into forward.
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Old 04-15-2017, 03:25 PM   #2 (permalink)
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Originally Posted by aglick87 View Post
Has anyone ever had trouble with their engine reverse, and the motor stalling? We are having trouble with a 2010 F8 with the 800 HO. We have checked the wiring harness everywhere and swapped ECUs with a 2015. The stater and ignition pick up coil's ohm within spec. It runs fine otherwise. Where else should we look? It's stalls kicking into reverse and kicking into forward.
On Doo's with electronic reverse, it's a sure sign of low compression. Almost guaranteed on Rotax engines. And yes they do run fine until you try to reverse them.
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Old 04-15-2017, 03:42 PM   #3 (permalink)
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Check tps
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Old 04-15-2017, 04:12 PM   #4 (permalink)
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On Doo's with electronic reverse, it's a sure sign of low compression. Almost guaranteed on Rotax engines. And yes they do run fine until you try to reverse them.
Took the words outta my mouth. A lot of times it's a sign of bigger issues, and I would agree that a compression check is a must. If it checks out, good - one less thing to worry about!
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Old 04-15-2017, 09:19 PM   #5 (permalink)
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I'll check the compression. There's 7500 miles on the machine. To my knowledge, the engine has not been cracked open yet. The other issue that has surfaced recently is hard starting below 15f. That could be linked to the compression as well. It takes strong brisk pulls to get it to fire when really cold out. Never was this way before. Reeds were inspected and all petals are intact.
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Old 04-15-2017, 10:20 PM   #6 (permalink)
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Isn't as simple as a belt thats just to tight is it? Short belt, or a worn one that got adjusted short, dragging hard on the the primary shaft but not contacting the sheaves enough to squeel or creep the sled? (Seen it)
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Old 04-15-2017, 11:15 PM   #7 (permalink)
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Isn't as simple as a belt thats just to tight is it? Short belt, or a worn one that got adjusted short, dragging hard on the the primary shaft but not contacting the sheaves enough to squeel or creep the sled? (Seen it)
This was my first thought also, try taking the belt off and see if sled still quits when you put it into reverse.

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Old 04-16-2017, 12:25 AM   #8 (permalink)
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I'll remove the belt and try it. He did blow a belt on our trip up north. I threw the new one on quick and didn't remove any washers from the secondary bolt. And this problem did seem to start about that time.........this has the potential to be quite embarrassing. I do know the belt is not chirping though. All the ones I've had a touch tight chirped and sounded horrible. But boy do they leave hard/smooth that way.
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Old 04-16-2017, 12:44 AM   #9 (permalink)
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Be an easy fix though, if that's it.
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Old 04-16-2017, 11:52 AM   #10 (permalink)
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Stalls with the belt laying on the seat. Compression test is next. What's a reasonable cranking compression warmed up for the 800 ho? 145 psi?
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