1988 Bayliner Avanti 3450 twin 454 US Marine Corp info??? HELP!

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Hello, I'm looking for any information on the motors in my boat. They are twin 454 built in 1987 with a plate on the exhaust that reads US Marine Corporation Marine Engine. I cannot find a manual or specs on this. I had OMC motors which are easy to find a manual. I'm looking for specs, repair guides and anything useful. Thanks in advance.
 
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Nov 12, 2015
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Hello, I'm looking for any information on the motors in my boat. They are twin 454 built in 1987 with a plate on the exhaust that reads US Marine Corporation Marine Engine. I cannot find a manual or specs on this. I had OMC motors which are easy to find a manual. I'm looking for specs, repair guides and anything useful. Thanks in advance.
i need the same thing
 

redneck joe

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Mar 18, 2009
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Belated welcome to the forum. I had this same boat, never could find much either.

Are you having a specific issue?
 
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