Deanrw3

Currently working on my winter project, 1980 formula 233. I knew the transom was wet and have already pulled that apart. When I pulled the motor I noticed that 1 of the 4 lag bolts holding the motor mounts down had wet wood on it and was loose in the Hole.

I was planning on cutting the top off the stringers and replacing that wood as well. I tested drilled a couple spots along the stringer and the wood doesn't seem rotted and wet like I expected. Even right next to the holes for the lag bolts it seemed ok. I would have to imagine there is some wet wood in there either way if the lag bolt holes were that rotted. I plan on going to a custom mount that bolts into the side of the stringer instead of the top for better mounting

My questions are:
1. Is my best bet to still cut the tops off the stringer and start over? Are there any other safe alternatives?
2. If I cut the stringers, are there any critical measurements I should take first? I got the general height, but it is tough to be accurate because the glass on the bottom isn't perfectly smooth.
3. On the back fiberglass wall there is a thing "film" of wood left on it, what is the best way to remove this? See picture.

The transom cut out, where I currently am at in the project:


Pictures of the wet transom just for fun:

79formula

I have a 79 Formula. I had to re do the transom also. In mine I found that the 4x4 engine mounts were also wet. You might want to check them.

Deanrw3

79 - did you just cut the top off the engine mounts and dig out the bad wood then replace with new wood? I've read a lot about this so far, but do you have any good links that you used?

jbraun2828

Hey what's up dean, looks like you have your hands full this winter. I don't know anything about glass work ,otherwise I'd love to help you out. Keep up the good work. Jason

79formula

The motor mounts are just 4x4s with a bevel cut on bottom. I cut the whole thing out, made new ones and glassed them in. Just put a straight edge across the boat and measure down to the mounts. Then when you rebuild make sure the height is the same. Also measure center to center as well as how far from the transom.They were pretty easy to swap out.

Deanrw3

Thanks 79, I dug into it and it made a lot more sense, wasn't as bad as I expected.

Jason, good to hear from you man. Hopfully I can get this behind me and see you back out on the water in the spring.

glassdave

iTrader: (1)

On number three there i have had many 80's Formulas apart and found a few of them had severe build issus on the transoms with very poor lamination and large voids where the wood should have been bonded to the outer skin. After grinding back the remnants of wood and smoothing as best i could the surface was still very un evan and would have been very difficult to wet bed the new transom in with mat. In these extreme cases I set the new transom in with CoreBond, works great and is pretty user friendly. Where are you at in MI?

Deanrw3

Thanks for the info Dave. I got a scrapper and was able to slowly peel back the thin layer that was bonded to the fiberglass. I only got about half of it done at this point, but it was coming off. It appears to have bonded to the wood well before, is this an indication that it is not uneven? I'm assuming this transom has already been redone at one point, because it is repowered to a 454/bravo, but who knows what has been done in the last 30 years.

I'm not familiar with CoreBond, I will have to do some research into it. What does it consist of? Once I get it cleaned up a little more, I think I will have a better idea of what it looks like. I'm located just south of Grand Rapids, MI...

Deanrw3

Do I need to cut this lip back flush or can I leave it about a half an inch up and use it as the outline for the transom? I assume the filler would cover this anyways?



Thanks.

jeff32

nice work started here!!!