putting 115 yamaha 25 inch shaft on 20 inch transom

H

hookless

Cadet
Joined
Aug 26, 2004
Messages
14
Can i do damage to an engine if it sits 2 inches below the hull. I do not want to add a jack plate to the boat. The shaft is 25 inches but the transom is 20. I think it will just be alittle slower doing this. If still propped right is this fine? Thanks
 
R

rodbolt

Supreme Mariner
Joined
Sep 1, 2003
Messages
20,066
Re: putting 115 yamaha 25 inch shaft on 20 inch transom

will lose a lot of power. will use a lot more fuel and it may acuaully spray water up the transome and into the splashwell.<br /> I built a transom extender out of 1/2 al plate. I used a 25" motor on my bass boat <br /> my advice is to use the motor mounted at its correct height.
 
R

Ray Neudecker

Lieutenant Commander
Joined
May 25, 2004
Messages
1,656
Re: putting 115 yamaha 25 inch shaft on 20 inch transom

like Rodbolt says, you will regret it if you do so. Bob's machine sells a jackplate that will turn in for a 2/12 inch set back. It should give you enough height to do the job.
 
K

Kanadakid

Petty Officer 2nd Class
Joined
Dec 21, 2004
Messages
141
Re: putting 115 yamaha 25 inch shaft on 20 inch transom

Yes, Ray is giving you the right advice. depending on the engine there may be enough holes to set it 5 inches higher. If not get the plate. The boat just won't handle right and you may putt way to much strain on the steering with the increased drag.<br /><br />loose you steering at WOT with some folks in the boat spells disaster !<br /><br /><br />Kid
 
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