MountingOutboard Motor on a 1988 fisher sv18 gt

[Vortecus]

I recently bought this boat has a 100 merc on it. looks like the motor was mounted on a longer boat and is missing 2 bolts . i have got new stainless bolts. Question is there is a pad on the back of the transom .Looks to be made out of pressboard. Can i remove this and mount motor directly to the alum transom.No info avail on boat they quit making them and company was bought by tracker i think .any suggestions ?

 

[Bob_VT]

Re: MountingOutboard Motor on a 1988 fisher sv18 gt

That's a GREAT boat with aluminum decking! I had one and miss it.

I would make a piece from 3/8" exterior plywood, seal with epoxy resin and mount that board to the transom. It will save the transom from the motor digging into the aluminum.

Post pictures!!!

Yes they went WAY WAY down hill after they were purchased by Tracker

Here is a picture of my old one (please do not post in that thread ) http://forums.iboats.com/fisher-boats/look-what-i-found-yipppeeee-175805.html it was a dual console with a 115 Mariner I-6

 

[Vortecus]

Re: MountingOutboard Motor on a 1988 fisher sv18 gt

I read somewhere i could use plastic cutting board material ?

 

[roscoe]

Re: MountingOutboard Motor on a 1988 fisher sv18 gt

Plywood is your best option. It is cheap, paintable, durable, and 3m 4200 or 5200 sealant will adhere to it..

When Starcraft was sold in the late 70's, they started putting out boats with no wood transom pad. The aluminum really takes a beating.

 

[airshot]

Re: MountingOutboard Motor on a 1988 fisher sv18 gt

Your motor has little feet designed to bite into the wood to give the motor more stability when clamped or bolted to the transom. Something needs to compress to allow the motor to attach better and safer, and the wood does that very well. Besides that the wood is easily replaced if it gets nasty looking. You should have wood both inside and outside if you motor has any type of clamp on mount, if a thru hull bolt mount then just plywood on the outside. With just bare aluminum the metal will be gouged with those little clamping feet and much more vibration will be felt in the boat and damage the aluminum skin.

 

[Vortecus]

Re: MountingOutboard Motor on a 1988 fisher sv18 gt

Your motor has little feet designed to bite into the wood to give the motor more stability when clamped or bolted to the transom. Something needs to compress to allow the motor to attach better and safer, and the wood does that very well. Besides that the wood is easily replaced if it gets nasty looking. You should have wood both inside and outside if you motor has any type of clamp on mount, if a thru hull bolt mount then just plywood on the outside. With just bare aluminum the metal will be gouged with those little clamping feet and much more vibration will be felt in the boat and damage the aluminum skin.

Thank you i guess i am fiberglassing a piece of wood.

 

[roscoe]

Re: MountingOutboard Motor on a 1988 fisher sv18 gt

Unless you are planning on leaving the boat in the water for extended periods of time, weeks or months, a couple coats of oil based spar varnish and a coat of paint will do. Or a coat of good primer and a couple coats of paint.

 

[Bob_VT]

Re: MountingOutboard Motor on a 1988 fisher sv18 gt

To clarify..... yes you could use cutting board material since you are bolting completely through it but to find a piece large enough would be a waste. Yep, good old exterior plywood 1/2" or 3/8" (I would not go as thin as 1/4") and you can go the cheap and use varnish or even oil based paint (Rustoleum) on it but I would spend a bit of money and use some 2 part epoxy to seal the edges.

It will last for a long time