Installing a jackplate

geeco1

Petty Officer 1st Class
Joined
Jul 16, 2009
Messages
373
When I rebuilt my transom, my motor ended up about 1 inch higher than before. I don't know why, I can only suspect that the transom cap is thicker and the wood is slightly higher. I now notice that I have a little more issue with prop cavitation (or what ever), basically the prop loses grip easier. I really noticed this, on the past weekend when pulling a tube. My wife and another passenger was sitting in the bow and I kept sucking air around the prop. I had them move to the rear and the problem seemed better.

I was thinking about installing a Jack plate so I could lower my motor a couple inches. I know that I can buy commercially made ones but was wondering if I could make it myself cheaper. My idea is to take two plates similar to the picture below, and mate them up to each other and secure with 4 bolts. I don't anticipate wanting to raise/lower the engine once I get it adjusted.

If I try to make one, what thickness aluminum would be required?

Are there any cons to installing a jack plate on my boat (see signature)?
 

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jason32038

Chief Petty Officer
Joined
May 25, 2009
Messages
555
Re: Installing a jackplate

Jack plates are crazy expensive. Making your own jack plate might be more of a headache than just trimming the top of the transom off and refinishing it.
 

fucawi

Banned
Joined
May 18, 2011
Messages
1,039
Re: Installing a jackplate

for an 85 HP you are going to the talking 1/4 steel plate or 1/2 ally ..waste of time trim the transom
 

geeco1

Petty Officer 1st Class
Joined
Jul 16, 2009
Messages
373
Re: Installing a jackplate

Trim the transom?? ugh! I was hoping to avoid that. I didn't want to have to re-seal the top of the wood, seal the old bolt holes, and make a new top cap. Oh well. Maybe I'll use it as an excuse to buy one of those dual-cut saws that I've seen.

Thanks guys.
 
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