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Old 06-19-2006, 05:45 PM
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Default Mercruiser 502 Mag MPI Compression
What is the normal compression on a stock 502
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Old 06-19-2006, 07:20 PM
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Default Re: Mercruiser 502 Mag MPI Compression
Originally Posted by mars
What is the normal compression on a stock 502
Thank you
8.75:1
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Old 06-19-2006, 08:02 PM
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Default Re: Mercruiser 502 Mag MPI Compression
Originally Posted by Kanookstr
8.75:1
Maybe my question was not understood, I was meaning Pounds/square inches and not the ratio
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Old 06-19-2006, 08:51 PM
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Default Re: Mercruiser 502 Mag MPI Compression
around 140#
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Old 06-19-2006, 09:15 PM
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Default Re: Mercruiser 502 Mag MPI Compression
Three compression stokes(plugs out and carb open) should get you 140/150
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