cowboy_36618
Cadet
- Joined
- Mar 11, 2009
- Messages
- 20
Hey fellows, I have a 1988 Evinrude 70 hp with a 13x17 prop off a 1978 Evinrude 70hp.The boat is a 1978 Tidecraft 16 foot "about" ,My question is, when im at WOT the rpms seem to be high, but not enuff prop, it feels like it could go faster by the sound of rpms. which prop would i need to go up to or down to, to get more top end ? I was told if I went up to a 13x19 I would lose around 200rpms and drop in speed. Im no boat tech or prop guy... how do i figure out which way to go on the prop . Im not worried about out of the hole or fast take off ,which ever way you want to put it, more than goin faster . I really want to more or less match rpm with the prop to get the best performance from the engine for the boat. please help me out to figure out which prop I need, up to a 13x19 or down to what ? thanks