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17' Montauk propeller advice
huckelberry145	#1  Posted on 11/01/18 - 6:01 PM
Member Posts: 401 Comments: 3 Joined: 03/10/12	I have a 1992 17' Montauk that I repowered with a 1989 90 hp Yamaha. After all of the restoration work I have done to the hull and the motor it finally hit the water today. The motor is mounted two holes up and is turning a black painted stainless 13"x19p Yamaha prop. Trimmed all the way down it turns 4800 rpms at 35 mph. When I trim it up I get it up to 5000 rpms and 40 mph. Could I see better results with a different and better prop or is this what I should expect? Thanks
Phil T	#2  Posted on 11/02/18 - 12:06 PM
Administrator Personal Page Personal Album Project Albums Posts: 7043 Comments: 6 Joined: 03/26/05	H- I think your mounting height is correct. Your prop is close but not the correct size. It is slightly too much pitch. This is often called being overpropped. The member recommendations for your boat and engine models include: 13" x 17" Yamaha Painted Stainless Steel 13-1/4" x 16" Yamaha Performance Series 13-1/4" x 15" Turbo 1 4.25 As you can see the sizes are different due to the prop models having different blade geometry. If you drop down 1" in size in the same model of prop, you will gain the appropriate rpm's at WOT. The WOT range is 4500-5500 for the engine. The Yamaha painted stainless prop is a good prop and less expensive than the Performance series. I had the same engine/prop on my 1987 Montauk. WOT was 43 @5300 running light and solo. Edited by Phil T on 11/02/18 - 12:22 PM 1992 Outrage 17 I 2019 E-TEC 90, Viper 17 2+ 2018 Load Rite Elite 18280096VT
huckelberry145	#3  Posted on 11/03/18 - 7:27 PM
Member Posts: 401 Comments: 3 Joined: 03/10/12	Thanks Phil, thats what I was thinking. I have a Turbo prop on my 15' and I really like it. Also, the local prop dealer in my area will let me test out propellers to make sure his customers get the right one.