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Prop size for 1986 13 super sport with 2007 F40 Yamaha
MRequidan	#1  Posted on 05/25/20 - 11:58 AM
Member Posts: 9 Comments: 0 Joined: 05/17/20	I am running a Yamaha F50 [fixed engine model] on my 1986 13 super sport. At WOT I am running 6000rpm which is the top of the suggested rating for my engine. The current prop is aluminum and is not in the best of conditions. The only mark I can see on it is 13, which I assume is the pitch so I am not sure what the prop diameter is. I am now in the market for a stainless prop and was wondering if I should get a slightly larger diameter prop. (changed to full 4 digit year per guideline #1 at the top of this page) Edited by Joe Kriz on 05/25/20 - 1:49 PM
biggiefl	#2  Posted on 05/26/20 - 10:27 AM
Member Posts: 890 Comments: 4 Joined: 05/08/06	I would try a 13' pitch SS prop since you are at the top. Might bring you down a hundred or 2 rpm's. 24 Whalers so far....