thatone123
Banned
- Joined
- Mar 7, 2009
- Messages
- 707
My passion is running 12 ft Jon boats as fast and as shallow as possible while keeping the weight to an absolute minimum. I have used the standard prop, also a 2 blade 9x10...no longer manufactured to my knowledge, 4 blade 9.25x9 and a 3 blade 9.5x12.5. I run on narrow sloughs with lots of turns and rpm readings are hard to take as RPM is constantly up and down. Boat has 3 inch jack plate and weight can go from just me at 190lb. to 2 big dudes loaded to capacity. The old 2 blade (weedless) seems to give lots of power in a light boat, the high pitch 12.5 seems to give good power for loads without needing to be a high RPM. The blade ventilates when hitting the throttle and seems to slip a bit to get on plane/step. I am wondering if this slippage is detrimental to engine life? I have various models of this OMC motor and like the modular late 80's models the best with the front shifter. With the different blades in number and pitch and etc.. they all seems to give performance that is close to one another? The one is using 2 blades with larger diameter, the other is 4 blades with smaller diameter and the other uses pitch to get power. Just Wondering? I have read a lot about props and know that high pitch usually means speed, and lower pitch power and that 2 blades are usually speed props and 4 blades power, most things considered. (in general)