Building up transom

[shakey55]

Hi all after some thoughts.

I have an older model Seafare V-Sea (16') which has a 20" transom.

The old motor needs rebuilding or replacing.

I'm considering the replacement option and have the opportunity to buy a good used 60hp four stroke (extra long shaft).

I believe these need a transom of 25". What are people's thoughts on building up my transom to take this motor.

Good idea or not ?


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[BM]

Use a 20mm thick alloy plate to lift the engine. Most economical way to do it.

[odes20]

Yep
i agree with BM, however,
if you want to glass or epoxy in a lift you will need to build it in with it extended right our to both sides of the transom on the inside. It will be load bearing so adding it in needs strength. The pic i have drawn shows where it should be glassed in on the inside of the transom. You would need to cut it into the side walls of your engine well, so it can sit flush against the rear transom wall. Then you would need to add glass layers onto the outside to make the outside of the lift flush with the exterior of the transom. This will also mean refinishing the complete transom to get a nice looking job as well.
Hope that helps

[shakey55]

Thanks buddy. I've been thinking of ways to do it. I'll give your suggestion some thought.

[Fed]

You'd think a straight plate or fibreglass build up would give you problems with the new location of the bottom bolts ending up right at the bottom of the splashwell, how does it go in real life?

I've seen a few made up from U channel or purpose built ones with minimal set back.

[scottar]

With the ally plate you can use countersunk heads for the lower bolts. Tap the threads in and hit them with some good locktite and they should even withstand the nut being undone and done up without coming loose should an adjustment be required.

[odes20]

You'd think a straight plate or fibreglass build up would give you problems with the new location of the bottom bolts ending up right at the bottom of the splashwell, how does it go in real life?

I've seen a few made up from U channel or purpose built ones with minimal set back.

Fed thats a very important observation.
I have raised a few transoms and the bottom bolts were just under the existing well, however he would do well to measure it.

[shakey55]

FED That is an interesting thought. I'll have to consider that as I make a decision.

I'm leaning towards the alloy plate as it might be easiest and should be stronger.


'shakey'

[Noelm]

If you have an older VC and are putting a 4 stroke on it, build up the transom, AND, the inside as well, or buy a good pair of waders for fishing....

[shakey55]

Noelm. I was thinking of an extra drain hole or two. I think that would work


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[shakey55]

For those interested I have decided against changing design of my boat. I just wouldn't be happy with changing my Seafarer V-Sea. I'm keeping the boat as it should be, foregoing the good deal second hand outboard and buying a brand new Mercury four-stroke the correct shaft length.

I'm now happy [emoji41][emoji41][emoji41]


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[Noelm]

Just be aware that the early VC with a 4 stroke will take water in the motor well and straight over the low inner section into the boat.

[shakey55]

Why is that Noelm


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[scottar]

Extra weight.

[odes20]

YEP the weight factor of four strokes amplifies the need to go longer shaft and get that clearance lifted to compensate. The transoms Ive rebuilt for the longer leg have worked well in this matter.