'03 XC 800 stock compression - HCS Snowmobile Forums

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Old 02-04-2009, 09:45 AM   #1 (permalink)
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I am wondering if anyone has the stock compression spec. that Polaris lists in the '03 service manual. I have seen many numbers posted but I am looking for the Polaris numbers. It is an '03 so there is a decompression port. I have the '01 manual that states 140 psi but with the decompression ports on the '03 I think it may be less. I like to have a baseline on a fresh rebuild and my gauge is usually within a pound or two of the Polaris specs. on my 600's. I am reading 135 on each after 500 miles on a rebuild and I am thinking/hoping that this is close. Any help would be appreciated
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J.V.
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Old 02-04-2009, 09:32 PM   #2 (permalink)
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I've got the '03 manual here,but i don't see any listing for compression .
I've always had 150 psi on mine,with new piston at 165 before break-in.
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Old 02-05-2009, 07:52 AM   #3 (permalink)
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[quote]
I've got the '03 manual here,but i don't see any listing for compression .
I've always had 150 psi on mine,with new piston at 165 before break-in.
[/quote

Do you have the 2003 Performance Service Manual no. 9910852?

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J.V.
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Old 02-05-2009, 09:41 PM   #4 (permalink)
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Yes,i do...was that a trick question? I've got PN # 9918052
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Old 02-06-2009, 07:34 AM   #5 (permalink)
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Just wondering because I have the '01 manual and it does list the compression specs .The engine compression for the '01 600 is 120, and the 800 is listed at 140. I am wondering what Polaris engineered the compression to be on the '03s (with the decompression holes). Just thought it would be in the service manual like the '01 manual. We have three liberty 600's(up to 10,000 miles untouched) and they all check out to be within a pound or two of 120.

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Old 02-06-2009, 08:03 AM   #6 (permalink)
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Gauges can be off at least 20 LBS. between them.
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Old 02-06-2009, 10:59 AM   #7 (permalink)
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The one I like best reads 10# high!
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