Polaris liberty 600 running rough after overheat - HCS Snowmobile Forums

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Old 03-15-2020, 08:37 PM   #1 (permalink)
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Default Polaris liberty 600 running rough after overheat

I am sure this question has been asked a dozen times but I have not been able to find an answer so I'll have to ask it again. I have a 2005 Edge Touring with a 600 Liberty engine. It overheated last week and went into protection mode for about 3-5 mins.

After that, the sled was not running correctly for the rest of the trip. I could not gun the throttle, I had to rev it up a little and once the clutch engaged it seemed to run fine with decent power. However, I could not get it above about 40 MPH. I was only doing family trail riding so 40 MPH was fine for the rest of the trip (about 60 miles).

I tested both cylinders and have 120 PSI in both. The sled starts and idles fine. I pulled the spark plug wire off each plug, one at a time, and the engine does stay running but rough. I replaced the temp sensor. It is not acting like it is still in protection mode. It still bogs if I gun the throttle.

Any suggestions
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Old 03-16-2020, 08:19 AM   #2 (permalink)
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Current Sled(s): 05 600 xcsp 50th
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Have you taken a compression test after this?
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Old 03-16-2020, 08:23 AM   #3 (permalink)
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Never mind, last paragraph just popped in. Wondering now if any of the carb to air box vent lines came loose. Make sure the temp sensor junction plug to the main cdi harness has clean contacts.
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Old 03-16-2020, 01:37 PM   #4 (permalink)
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Replace the plug caps.
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Old 03-17-2020, 08:55 AM   #5 (permalink)
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replace the temp sensor. these don't like to be over heated. common problem.
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Old 03-17-2020, 04:19 PM   #6 (permalink)
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Join Date: Sep 2005
Posts: 39,142
Current Sled(s): 05 600 xcsp 50th
Previous Sled(s): All of the big 4
Location: Ct.
Favorite Riding Area: Ma.
19-20 Mileage:
18-19 Mileage: not much
Age: 6
Riding Since: 70 s
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Quote:
Originally Posted by northstarrick View Post
replace the temp sensor. these don't like to be over heated. common problem.
Op claimed he replaced the temp sensor but didn't help. Maybe a defective one? I've had corrosion between the connector and the cdi harness cause the engine to run rough.
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