Eliminate water coming over transom at WOT.

[jgbass]

I have a 2001 Triton TR21 PD with a 2001 Mercury 225 EFI. 25" Tempest. Pad to Prop Shaft 3.75". 6" Manual Jack Plate. I am having a lot of water coming up through the jack plate and around the engine at WOT. There are no transducers catching the water. I realize the engine could be moved up some but at this height I would expect not to get all of the water coming up around the motor. Any help would be greatly appreciated.

 

[BWR1953]

Try searching for "hole shot plate" ... might be what you're looking for.

 

[GA_Boater]

Welcome aboard.

"Pad to Prop Shaft 3.75"" means? Photos help.

Using a jackplate usually needs a higher motor because of the stern wave behind the boat. With no pics - Your motor is in too deep and it needs to be raised.

 

[jgbass]

The center of my prop shaft is 3.75 inches below the pad of my boat. I have attached a video of the motor running. You can see all the water coming up. It happens when I am going full speed (WOT) not when slowing down.

 

[jgbass]

http://www.gossettfishing.com/video_tr21.mp4

 

[GA_Boater]

Too low.

 

[ondarvr]

A combination of raising the motor and a hole shot plate should help a great deal.

 

[Bondo]

Ayuh,.... Is there a pitot tube comin' up through there that's disconnected,..??

 

[Watermann]

That's a lot of water that looks like it's being scooped up up through the jack plate. I can see the AV plate is on top of the water so your motor isn't too low. You need the hole shot plate BWR suggested to block off that hole at the bottom of the jack plate.

 

[ondarvr]

The rear of the AV plate is visible, the front looks to be under water.

 

[Watermann]

The rear of the AV plate is visible, the front looks to be under water.

AV plate looks clear of the water to me. (screenshot)

 

[jgbass]

Thanks for the responses.

 

[ondarvr]

AV plate looks clear of the water to me. (screenshot)

​As I said, the rear of the AV plate is visible, you can't see the front of it, what you can see in front is the splash deflector above the AV plate and water is splashing up to it. The leading edge of the motor splits the water and it doesn't close back in in time to conceal the rear of the AV plate. Which means the motor could still possibly be raised higher. These are all possibilities, until the fine tuning is done you never know exactly where you'll end up getting the best performance for how the boat is going to be used.

 

[Chris1956]

I also think the motor is an inch (or more) too low. Is that motor even the correct length for that transom? I would expect the boat to ride much higher in the water, than it appears it is.

 

[Watermann]

I also think the motor is an inch (or more) too low. Is that motor even the correct length for that transom? I would expect the boat to ride much higher in the water, than it appears it is.

There in lies his issue, OP says it's a 25" shaft motor most likely on a 20" transom and is using a 6" jackplate to get the motor up.

There is no way to see the front of the AV plate on a plane in the pic I posted above as it tapers off to nothing below the wider splash deflector.