What propeller for a 23' Sceptre?

[breadandbobbers]

sorry about my info, i was exhausted last night when I posted that info. Worked some long hours then had a frustrating test run with the boat. Anyways it is a 15 pitch mirage prop, turning 550 rpms. Sorry for the confusion

[eggsuckindog]

sorry about my info, i was exhausted last night when I posted that info. Worked some long hours then had a frustrating test run with the boat. Anyways it is a 15 pitch mirage prop, turning 550 rpms. Sorry for the confusion

doesn't seem possible either

[Fr. Frank]

If I assume that when you said 550 rpms, you actually meant 5500 rpms, then you should be right on.

5500 rpms, with a 1.75:1 gear ratio, turning a 15" pitch prop, assuming slip ratio between .10 and .14 , works out to a top speed of about 38-40 mph, which is pretty good for a 23' Seacraft with a single 225.

My 23' Tsunami with a single Johnson 225 turned 5900 rpms with a 17" pitch prop behind a 1.85:1 gear case, and topped out at 39-40 mph. But I hardly ever went above 28-30 mph.

With a bracket, I strongly suggest you need trim tabs, and someone to teach you how to use them properly if you don't already have that skill.