Offshoreonly.com - what should the compression be?

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hauling ass-a

09-09-2003 06:30 AM

what should the compression be?

how many pounds should i have for a stock 2000 502 mag?

Biggus

09-09-2003 06:47 AM

@155

hauling ass-a

09-09-2003 07:40 AM

did a test last night and came up with 120 should i rip out my hair?

cuda	09-09-2003 07:42 AM

Did you have all the plugs out, the throttle open, and a fully charged battery?

220BR

09-09-2003 08:10 AM

Merc has a service bulletin on doing a compression test on their engines.

hauling ass-a

09-09-2003 08:51 AM

the throttle was at idle position, batteries charged, but did not pull all plugs. Anything else would be appreciated guys.

cuda	09-09-2003 09:23 AM

Pull all the plugs and open the throttle, I'm sure your compression will be fine.

stevejohns

09-09-2003 04:05 PM

I used a cheapo tester and had reading of 90-110. Took it to a proper mechanic , his tester read 147-153 on a motor with 220 hours on it at 1800 feet alt. FYI alt will affect the numbers. sj

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