How to raise engine height

[fenceguy2]

I have a 1981 25' Mako with twin 1994 150 johnsons recently mounted by a friend.
The anti-ventilation plate is 2.5" below the deadrise. My rpm's wot is only 4300.
From what I have read I think the engines are mounted too low and are causing drag.
The engines are mounted as high as they can with the holes so I am thinking about installing a pair of T-H MARINE Hi-Jacker Fixed Jack Plate.

Just wanting some peoples opinions of this.

thanks

 

[Zeeter]

Re: How to raise engine height

I have a 1981 25' Mako with twin 1994 150 johnsons recently mounted by a friend.
The anti-ventilation plate is 2.5" below the deadrise. My rpm's wot is only 4300.
From what I have read I think the engines are mounted too low and are causing drag.
The engines are mounted as high as they can with the holes so I am thinking about installing a pair of T-H MARINE Hi-Jacker Fixed Jack Plate.

Just wanting some peoples opinions of this.

thanks

Yup, get em up. Your killing them at 4300. I think at least a 3 inch rise is in order. Are you sure you cant raise them as is?

 

[fenceguy2]

Re: How to raise engine height

Not unless I drill new holes in the transom.
The top bolts are in the bottom holes on the motors. and only 2.5" from the top of the transom.