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Hey guys, I got a used Regal 2005 boat with a MerCruiser Chevy Vortec 4.3 v6. Im checking my t's because it is only getting 3600rpms and max 33 mphs. With a three blade 19 pitch and 4 blade 17 pitch both around 14 inches. Im pretty sure i know it can get more so I've been checking things on the...
