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Search: Posts Made By: Gbalco360
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07-15-2010, 08:41 PM
Replies: 2
Views: 1,913
Posted By Gbalco360

502 mag MPI Compression

I am looking at a boat with twin 502s. the compression test showed 120 to 125psi. I read on other post that a healthy 502 should be between 150 and 160psi.

are these motors on their last leg?
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