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#12471674 - 10/19/17 05:37 PM Boat porpoises at wot
Monkeypuncher Offline
Outdoorsman

Registered: 07/12/17
Posts: 173
Loc: Cedar Creek Lake
I have an excel 2172 with a Yamaha 150lb. Boat porpoises above 4100 rpms, if I put 100lbs of weight in the bow, it runs fine. I am looking for a permanent solution. Raise or lower engine? Change prop? Any help is appreciated.

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#12471676 - 10/19/17 05:40 PM Re: Boat porpoises at wot [Re: Monkeypuncher]
Bruce's Guide Service Online   content
TFF Team Angler

Registered: 09/04/03
Posts: 4332
Loc: southlake
what the prop set at. You need to try and set it at 3.5 below pad.
_________________________
Bruce's Sprinkler Repair
817-798-7246
49 years experience
State Licensed Irrigation
LI0017483


Fishing Texas lakes one at a time







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#12471683 - 10/19/17 05:48 PM Re: Boat porpoises at wot [Re: Monkeypuncher]
Monkeypuncher Offline
Outdoorsman

Registered: 07/12/17
Posts: 173
Loc: Cedar Creek Lake
The dealer set it at the bottom of the pad, I'll try lowering it. Manual jackplate.

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#12471706 - 10/19/17 06:08 PM Re: Boat porpoises at wot [Re: Monkeypuncher]
Bruce's Guide Service Online   content
TFF Team Angler

Registered: 09/04/03
Posts: 4332
Loc: southlake
_________________________
Bruce's Sprinkler Repair
817-798-7246
49 years experience
State Licensed Irrigation
LI0017483


Fishing Texas lakes one at a time







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#12471730 - 10/19/17 06:30 PM Re: Boat porpoises at wot [Re: Monkeypuncher]
Pat Goff Offline
TFF Celebrity

Registered: 01/29/05
Posts: 6018
Loc: Marble Falls/Seadrift
Porpoising on a bass hull usually is caused by the prop losing its grip at the current trim angle.

You didn’t say what prop you’re running so that would help.

If it’s a decent wheel than usually lowering a bit will cure the bounces.

After that it starts getting a little more detailed.
_________________________
Pat Goff
Marble Falls/Seadrift TX



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