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Hi,
I'm currently running a 13 5/8 x 13 prop on my 1994 75 yamaha enduro outboard. I'm considering going to a 13x19 as the old prop has seen better days( bent and pitted). At 5000 rpm I'm getting 29mph (gps) with the old prop.The boat is a 21ft flat about 5 ft wide on the stern weighing about...
