Removed inboard need to mount outboard

[Bamalady]

We recently purchase a 1996 Crest Savannah Gold 30 ft pontoon boat, diameter 26". We are planning to add a 16ft cabin. The mercruiser was a goner and we have just finished removing it. We have purchase a 2002 115hp Johnson to replace it. We understand that we must close the open hole where the foot was located. We are using alumium plate and will be using a jack plate. Looks like we will need a 12". We will be fishing in shallow water. Has anyone had to do this and if so, what problems will we be facing. We don't care about speed just installing an outboard to replace the inboard. Could really use help. Thanks in advance.

 

[Lawnmedic]

Re: Removed inboard need to mount outboard

You will need to do some major construction to beef up the area to mount the jack plate to the transom. The outboard hanging on a jack plate will be putting forces that the transom was not designed for.

 

[5150abf]

Re: Removed inboard need to mount outboard

Welcome to iboats.

Concur, an IO pushes on the transom from the bottom where an outboard pulls from the top, it is a completely different set of forces and a lot orinvolvethan just ccoinggthe hole with a plate.

First I would remove the old transom board and make a new one with no hole and have a plate welded over the cut out and bolt holes, then you would need to figure out how far to cut it down.

Google 'IO to outboard conversion' and see if you can find some good sources of info.

 

[Bamalady]

Re: Removed inboard need to mount outboard

Yes, we will be adding same thickness of wood to fill in hole, left by foot, plus aluminum plate inside and out. Just could not find anything on pontoon boat conversion. Guess it will be same as fiberglass? (Thanks for the wording to "google" it.

How do we measure for the correct jack plate? 10" or 12". Certainly don't want to get any futher out than necessary.