Apr 3, 2015 #1 P peldrid New Member Messages 3 Reaction score 0 I have a 20' SFX with a 70 yamaha. The dealer installed a 135/8 x 13 aluminum prop. The boat on hits 21mph at 5200rpms wot. Specs on engine say 6300rpms. Does anyone have any ideas on props. Thanks
I have a 20' SFX with a 70 yamaha. The dealer installed a 135/8 x 13 aluminum prop. The boat on hits 21mph at 5200rpms wot. Specs on engine say 6300rpms. Does anyone have any ideas on props. Thanks
Apr 3, 2015 #2 kaydano Well-Known Member Messages 4,316 Reaction score 2,232 11. What's the low end of the recommended RPM range? Last edited by a moderator: Apr 3, 2015
Apr 4, 2015 #3 P peldrid New Member Messages 3 Reaction score 0 I think 5300rmps. I looked at performance charts on yamahas web site and the rpm range was 5800 to 6200rpms.
I think 5300rmps. I looked at performance charts on yamahas web site and the rpm range was 5800 to 6200rpms.
Apr 4, 2015 #4 kaydano Well-Known Member Messages 4,316 Reaction score 2,232 An 11 may not get you to 5800...
