Atomic 4 prop

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Oct 2, 2008
3,807
Pearson/ 530 Strafford, NH
Two years ago I replaced my 2-blade prop with a 3-blade 10X7.4 prop. This is on my 1981 Catalina 30 which has the Atomic 4, 30 horsepower gas engine. I would like to change the pitch to 10X10 to get more bite. Has anyone done this with their Atomic 4? There isn't a tach on the engine for RPM's, but appears to be plenty of additional throttle that does nothing for boat speed. My cruising speed is about 5 kts and reverse is slow to little response.
I didn't find anything in the archives.
All U Get

I'm moving this thread to all Catalina owners:neutral::doh:
 
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