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Old 10-07-2005, 02:00 PM   #1
Ensign
 
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Default 4.3 liter auto to marine conversion

does anyone have any information on converting an auto motor to marine application. I know there are few differences in the actual 4.3 liter motor itself. a marine man from florida told me that if I installed marine head gaskets I would be just fine. I have a line on a 4.3 liter chevy blazer motor for $300.00 and boy if I can get this free 1992 19' maxum boat running and on the water for a $300.00 motor I will be one happy boater.
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Old 10-07-2005, 07:27 PM   #2
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Quick answer is the engines are the same. But, there's always a but, typically marine engines run a RV cam. Think about your engine turning 3200 rpm all day long.
Other then that swap manifolds and all the other marine stuff off your old block!
BTW congrats on your new boat!
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1999 3788 Alrighty Then Port of Everett
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Old 10-11-2005, 01:02 PM   #3
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THANKS FOR THE REPLY SAM... I LIVE IN MYRTLE BEACH AND THERE IS SO MUCH BUILDING GOING ON HERE OUR RIVER IS SO DEVEOLPED THAT YOU HAVE TO SLOW DOWN EVERY 5 MIN. FOR A NO WAKE ZONE THE MOTOR MAY LAST FOR EVER !!! LOL HAHAHAHAHA BTW WHAT ARE THE BENIFITS OF THE RV CAM??? IS IT SOMETHING I SHOULD INSTALL IN THE MOTOR ? THANKS I REALLY LIKE THIS BOAT AND MAN IS IT TERRORISING JUST HAVING IT SIT IN THE YARD AND NOT GO DOWN THE RIVER. I LIVE ABOUT 2 MILES FROM A NICE BACK WATER LANDING AND I CANT WAIT TO TAKE FRIENDS AND FAMILY TO THE RIVER TO EXPIERIENCE THE SWAMP, RIVER AND BACK WATERS OF OUR RIVER SYSTEMS...
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Old 10-11-2005, 05:22 PM   #4
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The reason for the RV grind cam is to devlop the max power band for the RPM range the engine will be operating.
Most auto engines spend most of their time between 2000 and 2500 RPM, so the power band is most efficent at these RPMs.
Marine engines spend most of their time between 2800 and 3500, so you want your engine to devlop it's power at those RPMs.
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