Scott glorvigen discusses using 4 blade props for better performance on certain fishing boats.. Find great deals on ebay for 4 blade boat props. shop with confidence.. The first step is to know what your max. rpms are, and what you are getting with your current prop. i can just about guarantee you that if you go from a 17p 3 blade prop to a 17p 4 blade prop you will be very disappointed in the performance. you almost always have to drop in pitch from 3 to 4 blades..
Your 4 blade is a little too big . i'm running to same boat , with 25 3 blade . it blows out in 4 footers so i tried half way plugging the holes .. Find great deals on ebay for boat propeller 4 blade. shop with confidence.. On my buddy's premiere with a 250 horse his actually ran around 3 mph slower with the 4 blade but he could also troll a 1/2 mph slower with the 4 blade. so he kept the 4blade an his boat really sucks gas compared to mine..
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