2018 Pro Guide V 175 Combo Prop Testing

I recently purchased this boat. It has a 115 mercury 4 stroke. I have had it out 4 times now. With the stock prop and a light load I could only achieve 37mph @ 5200 rpms at wot. Stock prop is a 13.25 x 17 black max 3 blade. I could not trim the motor much at all before the prop started to ventilate and slip. I did not get much bow lift at all. I tested with a 13.25 x 13 rubex 4 blade. I hit the rev limiter easily with a light load. Fully loaded I was hitting 32mph @ 6000 rpms at wot. I could trim the motor higher and achieved more bow lift. I just purchased a 13.5 x 15 hustler 4 blade. I hope this will give me more acceptable numbers. I called the shop and asked them if the stock prop was correct and they said it was. Well it’s not acceptable to me. They need to outfit this rig with a different prop when the boat is delivered.

I hope this can help someone out with this rig.

 

I got to try out the 13.5 x 15 hustler 4 blade this weekend. It’s going to be the perfect prop for a heavy load. With a light load I was running 38 mph @ 6000 rpms. I think I want to get this prop in a 19 pitch for speed with a light load. I’ll report back in a couple of weeks.


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What year is your motor? I believe they might have changed the lower unit gear ratio this year or last. What height is your motor mounted? Some have suggested I raise the motor, but right now the anti-ventilation plate is just above the lowest point of the hull.


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That’s really strange as mine came with a 17 pitch and I could only hit 5200 rpms. I think it has more to do with the prop design. Getting my 4 blade 13 x 19 Hustler today. I’ll get to test that out this weekend.



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I’m surprised you can achieve 6200 rpms. My rev limiter kicks in at 6100.


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Tony, what holes are your motor mounted in? I saw one today with a 150 and it was mounted in the 3rd hole down. I might need to raise my motor. Tried the 19 pitch today and I could just barely hit 5000 rpms with a light load.


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So I’ve tried 4 different props now. I can’t get my boat to run any faster than 38mph. 13p 32mph @ 6000 rpms , 15p 38mph @ 6000 rpms, 17p 38mph @5300rpms, 19p 38mph @ 5000 rpms. What gives?


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You don’t want to go to a 19. I have no idea how Tony’s motor is able to swing that prop. Mine can’t at the rpms he claims to rev. You need to go the other way. Try a 15 pitch 4 blade.
What is your wide open throttle rpms?


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