Mercruiser 502 Mag MPI Compression

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06-19-2006 | 05:45 PM

mars

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Mercruiser 502 Mag MPI Compression

What is the normal compression on a stock 502
Thank you

06-19-2006 | 07:20 PM

Kanookstr

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From: MA

Re: Mercruiser 502 Mag MPI Compression

Quote:

Originally Posted by mars

What is the normal compression on a stock 502
Thank you

8.75:1

06-19-2006 | 08:02 PM

mars

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Re: Mercruiser 502 Mag MPI Compression

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Originally Posted by Kanookstr

8.75:1

Maybe my question was not understood, I was meaning Pounds/square inches and not the ratio

06-19-2006 | 08:51 PM

Griff

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From: Omaha/LOTO

Re: Mercruiser 502 Mag MPI Compression

around 140#

06-19-2006 | 09:15 PM

mopower

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From: pitman nj

Re: Mercruiser 502 Mag MPI Compression

Three compression stokes(plugs out and carb open) should get you 140/150

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