nOOb I/O question 3.7 vs 3.0

[spareparts]

the Mercruiser 3.7L engine was based on one Ford 460 cylinder head, the block it self was aluminum, while the head was cast iron. It would be nice to use the aluminum head(weight savings, and simular expansion rates of head and block), but its not needed. I've only seen a few that had head gasket issues, the biggest problem the 3.7 had was leaking manifold to riser gaskets

[bowhunter510]

thanks for the quick reply. my v20 came with a 165 I would like a little more power but I dont want to do any major changes to the stringers so I guess I will ad 190 intake and carb

[spareparts]

make sure you get the oil cooler with it(factory on the 4bbls), convert your ignition to pertronix, if the charging system is in decent shape, replace the regulator with a CDI regulator, if you don't have the 4" heat exchanger, you willl need it.. And if you want to spend the money, replace the factory rocker arms with comp cams roller tip rockers(more accurate ratio than stock)

[bowhunter510]

I will replace all those things and hope its enough and if it aint I will add a bracket and a 98 evinrude 200 hp fitch that I was saving for a bigger hull like a 23 ft walkaround Im hoping to score in the near future Thanks.