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Discussion Starter · #1 ·
New to the forum and need some help, I've got a 15' tunnel hull pathfinder with a 40hp on it. My issue is when i give it throttle to jump out of the hull the boat squats real bad and the motor sounds like its bogging down and almost at half throttle, plus the boat just does not want to jump up with me and one extra person. Now once the boat gets on plain the motor revs up and the thing takes off like a rocket. No I'm not the first owner and did not mount the motor plus the motor does NOT have a trim and tilt motor, just the assist for towing the boat on the trailer. once you give it some throttle in the water the motor kicks all the way down. now i do plan on either grabbing a trim and tilt for it or a jack plate with a trim and tilt built into it to help with the ride and the hop issue I'm having. but I'm just curious if anyone else has had an issue like this and if its actually the position of my motor and a trim and tilt would help the issue or its too big of a prop because like i said. once the boat gets on plain the motor revs up and sounds like its at its max potential and the things speeds up like a rocket.
 

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Sounds a like it could be a few different issues, but I’m with smack, seems the prop may be the main culprit. Assuming the engine is sound.
I’d start with putting a tach on it and see what the numbers are. Amazon/EBay has some for 10-15$.
You can also play with pin location. Raise/Lower it a hole and see how it acts.
Being it’s a manual and has no T/T, you will generally have a little give n take. Example: You generally will lose some hole shot to avoid it a plowing.
However the engine shouldn’t bogging down regardless.
 

· waterman 16
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Are you sure that there is no water inside the hull? These boats had a history of hull issues. I haven't researched recently but folks used to install dual bilge pumps (one on either side of the tunnel) and the same for drain plugs. I hope it's just your prop....
 

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Discussion Starter · #6 ·
well at first the boat was dry on the inside and it still had the issue. after a few hours of fishing the boat had a bit of water on the inside and would not jump up at all but here's the prop I'm running on it. i go this weekend to have a guy hook a computer up to it and well run and and hell let me know about the prop. which is what he's also thinking the issue is because the motor had just been gone through and runs like a champ.
 

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well at first the boat was dry on the inside and it still had the issue. after a few hours of fishing the boat had a bit of water on the inside and would not jump up at all but here's the prop I'm running on it. i go this weekend to have a guy hook a computer up to it and well run and and hell let me know about the prop. which is what he's also thinking the issue is because the motor had just been gone through and runs like a champ.
I think he is referring to water under the floor😜
 
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