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    Bigger prop.. over revving is worse??

    Boat: 17' 1980 Ranger 235v ​Motor: 1983 Mercury 70 HP ​Old prop: 11" 12p ​Old speed and rpm: 32MPH at 5500 RPM New prop: Mercury 10-3/8" 13p ​Put the motor on my boat with a bent and chipped prop for testing...
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    1986 75hp Mercury Half Throttle issues. Missing, Detonation?

    I'm pretty much new to boats. So I may be missing something here... The Back Story: I bought a 17' ranger 235v with a 75 hp merc on the back with no spark. I've put on a new stator, trigger and CDI. This brought me spark. The failed component was the CDI. I thought this was it so I took it to...
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    25hp Evinrude. Finally running good an then. Missing?

    1979 Evinrude 25905R 25hp I had some troubles getting it running. Put a new power pack on and that fixed that problem. Then couldn't get it to idle. So I pulled the carb and cleaned it out. Finally had it running great for about 3 miles. Was cruising 20mph with about 600lbs in a 16ft Lowe V...
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    1979 Evinrude 25HP No/Intermittent spark

    First of all, thank you to anyone who helps/views this thread. I'm new to the forum. 1979 Evinrude 25HP 25905R Compression is about 130 in both ​Flywheel was removed for photos I bought a fishing boat with this motor on it. The guy I bought it from claims he ran the motor this year. I'm not...
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