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Old 11-27-2010, 05:33 PM
abl1111 abl1111 is offline
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Join Date: Feb 2003
Location: long island, ny
Posts: 1,053
Default Re: Mercruiser Woes-What Next?


SH*T !

I have the same motor, 2001, 350 300hp Mag MPI ( fresh water cooled. With original elbows, manifolds and risers... 450 hours. Salt water use... I never flush after each use.

I have a few questions - obviously my manifolds are older than (6) years.

(3) years ago I had my mechanic replace the gaskets at the risers joint - he said the manifolds from that point looked great...

My motor runs cool as she ever has - Should I replace the manifolds, elbows and risers if all seems OK ?


BTW - If I were in your predicament, not being as mech inclined as many of the above - I would do a few oil changes w/ marvel mystery oil in there. Run and dump oil. Get moisture out. Compression test to make sure is OK, 'pickle it' fuel side and oil. Then get new manifolds and install - start her up ASAP, run for a awhile, then winterize again...

Good luck...

Another LI'er...
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