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WOT Top Speed 23 foot walk around chevy 350 with 280 penta

hucksterfool

New member
WHat should my top speed be in my boat. I currently can cruise at 25 at 3500 and top out at 4000 rpm at 30. I think i should be able to get alittle faster. I dont have trim tabs or tilt. Attached is my prop id numbers. prop says 290 on it. Anyone have any prop information for my to give it a shot. Please help me should i bet getting 4500 rpm?
 

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