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Discussion Starter · #1 ·
I have a 25 foot Cobia rigged with a 225 yamaha four stroke. Bought boat last summer and have been running a 13 3/4 by 17 yamaha prop. Prop is dinged up a little and I got a deal on another one. The new prop is a 15 1/4 by 17.
Old prop turned 6,000 rpms wide open. What can I expect with this prop and will I have any major issues rpm or speed wise? Boat wouldn't run but 41 mph before at 6000 rpms. My guess is boat will pop out of water quicker with this prop, I will drop rpms and a couple miles per hour???
Experts please chime in.
Thanks and tight lines!

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