Re: what size prop should i try next???

[amuller]

quote rswanson:

58′ evinrude 35hp lark. 74′ aluminum flat bottom 17′ monarch. in gear, throttle blade at W.O.T, timing is set to best i can figure. starts very easy with pull rope, hot or cold. starts perfect with starter, also. idle’s in gear 650-700 rpm all day. runs extremely well. the only prop i have is a 10 3/8″ x 12 1/2″. its only turning 3800 rpm with full tank of fuel, 2 people and all fishing gear. i would like it to turn 4500 rpm at W.O.T. in gear with my rig. i ordered a used 10″ x 9 1/4″ on ebay, but now thinking it will be too high rpm. thank you in advance.

So you want to increase rpm by 700 and your drop in pitch will be 3 1/4. That’s a large pitch change and you could end up with something intermediate. But no use speculating before you try it. Agree that taking out the nicks and a smooth finish can make a big difference.

Interesting article here on checking out propellers: http://www.aomci.org/members/library/ShipshapeProp.htm