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What Prop Size? - 1991 Montauk with 1991 Mercury 3 cyl 90 HP
Purchased in June. Revs top out at 4500. 26 gal tank. 2 POB + 1 Golden Retreiver!
History of boat vague. Very happy at 3800-4000. Would like proper wheel.
The PowerTech M135PTR22 is a 22" pitch propeller which is WAY too much pitch for that boat/motor combination.
The PTR series props are three bladed stainless steel cupped props with a fair amount of blade rake that will contribute to bow lift. It is comparable to Mercury's Laser II.
I would recommend the 13-1/4" x 20" Laser II or perhaps the 13" x 18" Mercury Vengeance if the Laser II proved to have too much pitch.
The 13-1/4" x 17" or 13-1/4" x 19" Stiletto Advantage I would be worth trying as well.
You want your WOT RPMs to be close to the redline of 5500 RPM so if you are only able to hit 4500 RPM now, I would guess you are going to need the 18" Vengeance or the 17" Advantage I.
