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#12678058 - 03/18/18 10:33 AM Skeeter SS90 porpoising
joho5 Offline
Extreme Angler

Registered: 07/03/08
Posts: 2994
Loc: Abbott, TX
When I am by myself it seems to do fine, but when I have a tournament load and a person, I can’t seem to run it at wot unless the boat is trimmed all the way down. When I start trying to trim up to gain speed and rpms, it starts porpoising. Very annoying. Livewells are in the back.

It has a Johnson 90hp, it’s 16.2ft, ballistic 13.5x17 prop, and 6” manual jackplate.

anything I need to try different? Motor is mounted about as high as I can without losing grip on hole shot and on turns.

#12679198 - 03/19/18 07:44 AM Re: Skeeter SS90 porpoising [Re: joho5]
steve@hydrodynamics Offline
TFF Celebrity

Registered: 08/25/06
Posts: 6839
Loc: Quitman,Tx
get the prop checked for tip cupping. or it could also have a slightly bent blade.

#12679403 - 03/19/18 09:26 AM Re: Skeeter SS90 porpoising [Re: joho5]
Capt Craig Online   content
Extreme Angler

Registered: 08/25/09
Posts: 1620
Loc: Richland-Chambers
You might try redistributing some weight to the bow of the boat. Sounds like a weight issue with the boat being 16' and having an extra 150+ pounds of a second person in the boat. Do a test and put the second person toward the front and see how that changes the boats balance.
Capt. Craig Copeland
Licensed by the US Coast Guard

2013 Nautic Star 2110 Shallow Bay Boat
Nautic Star Boats Pro Staff (
Redneck Fish'n Jigs Pro Staff (

#12690931 - 03/27/18 07:30 AM Re: Skeeter SS90 porpoising [Re: joho5]
joho5 Offline
Extreme Angler

Registered: 07/03/08
Posts: 2994
Loc: Abbott, TX
Lowering the motor 1” cleared it up. I think the prop was ventilating when trimming out.


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