i hav a 17P prop on mine and th that's EXACTLY the performance I get with my 1986 150 Yamaha.....40 mph at 5000 rpm... I've thought about monkeyin with the prop to get closer to 5500 rpm at WOT and see what I get but not really on my priority list....also figured being an 86 that it just might be a little too tired to spin up to 5500.
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1986 V-20
1986 Yamaha 150 HP
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