More transom problems, need some advice

[ondarvr]

Re: More transom problems, need some advice

There is no exact formula for making putty, every resin and combination of products will make for a different mix, plus you may want to fine tune the mix for certain applications. Using shredded CSM makes for rather hard to use product because of the long strands of glass, cutting them up shorter makes it easier to use. When you purchase glass fibers (milled fibers) for adding to putty they are very short, they look almost like powder, even these make for a lumpy putty if too much is used.

Cabosil will make a very creamy, smooth, sag resistant putty, microballoons make it lighter and easier to sand, but do little to help with sagging. Adding fibers makes it stronger, but can create a lumpy hard to level putty if too much is added or the fibers are too long.

 

[zymox]

Re: More transom problems, need some advice

Thanks again M8's

Yeah, I tried to paste with it but it felt like... mm, how to say ... like hairy resins with bubbles in it. Still kind of thin but on the other hand not. If i looked close I could actually see the thin resin in there mixed with something. Not the thick resin I would like to have. I'll see if my local dealer has any Cabosil/Aerosil and try to use that instead. I also now know for certain that I did use way to much fibers :facepalm:

I would like to use an optimal mix it to attach the transom to the outer skin and fillet the edges so I can laminate it really good.

 

[ondarvr]

Re: More transom problems, need some advice

WOG I was typing while you were posting.

 

[zymox]

Re: More transom problems, need some advice

No problemos, I really appreciate all the help I get here and besides I like two answers better than one since I try to learn from all of you pro's out here reading for hours about just everything that have with repairs to do.

 

[Woodonglass]

Re: More transom problems, need some advice

Use a large plastic spoon dipped in mineral spirts to smooth out the PB and form a nice coved seam on the edges of your transom.

 

[zymox]

Re: More transom problems, need some advice

hmm, never heard of mineral spirit. Is it something like white spirit ?

 

[Woodonglass]

Re: More transom problems, need some advice

Paint thinner

 

[zymox]

Re: More transom problems, need some advice

ahh, ok. then it's the same. Feels a bit oily if you get it on your fingers...
Lacknafta is the trademark in Sweden, called white spirit in Europe. Found some info about it on wiki

Thanks again M8, appreciate the time and effort you put into me.

 

[Woodonglass]

Re: More transom problems, need some advice

That's the stuff. White Spirit ehhh. Nice to know the terminology over there.

 

[zymox]

Re: More transom problems, need some advice

I was about to put my transom in to day but now I got a serious warp in the outer skin. I reinforced the corners all around last week where I took out some cracks and now when I clamped the middle section I saw that it will not straighten the skin enough, Especially from the draining hole and upwards, looks like it's a section around the hole thats way thicker than the rest of the skin.
How do I proceed? I will try to support the hull from underneath and raise the middle section some but I don't know if this will be enough.
It wasn't like this when I pulled the old wood out.

 

[zymox]

Re: More transom problems, need some advice

Solved the problem with my angle grinder. Grounded out 20% of the transom in a narrow made half-circle around the problem and bonded the whole transom-core in place with 6kg sticky and fiber rich PB. Felt really great. Pressure is just enough for the PB to squeeze out around every edge and also out of every old hole. It Looks like a humangus zit.

The fillet is what came out. + approx 350g so the rest is behind there bonding.

Pics:

 

[zymox]

Re: More transom problems, need some advice

Some progress in picture.

PB:d the core for a snug fit to the hull all around and to round of all the corners letting the cloth wrap it in nicely when the times come for that. Have to work to night so sometimes later this week it will be as good as new again

 

[Woodonglass]

Re: More transom problems, need some advice

I'd say that's and Excellent job!!!!

 

[GT1000000]

Re: More transom problems, need some advice

Very, Very Nice! Looks better than Factory...

 

[zymox]

Re: More transom problems, need some advice

Thank you very much for your kind words.

 

[oops!]

Re: More transom problems, need some advice

the work on the transom looks great.....

im just wondering.....the cut out looks very low compared to the hull of the boat....

are you using a short shaft motor?

 

[zymox]

Re: More transom problems, need some advice

Thanks.

Nope, The guy i bought it from said he used a long shaft motor.
I hope not it's for a short shaft since I have a long one and the trouth is that I have not given that issue a thought at all. :redface:
- Now I'm starting to get anoyed at my self...a bit...

Do you know what the normal length are for a short vs. long shaft?

 

[zymox]

Re: More transom problems, need some advice

I measured my engine and its approx. 50cm (19.7 inches) from the upper attachment down to the cavitation plate. Closer to 50cm (I don't know what it's called the L- shaped part used to hang the motor on the transom

 

[zymox]

Re: More transom problems, need some advice

I couldn't hold myself and my job allows me to get away a couple of minutes so I took a quick ride and did a measure of the transom height on the low part and it measures 49cm and then I don’t have the cap on. I think it will be pretty close to 50cm.
The measure i took on my motor is when it's in upper position due to the hydraulic lifter so I hope I gain a cm or two when it's fold down.
The total heigt of the hull from the bottom to the highest edge on the transom is approx. 90cm. (approx. 36 inches)

Should be in next post but only 6 pictures per post is allowed.
The outcome of the repair of a former picture here with a major crack in this corner.

 

[zymox]

Re: More transom problems, need some advice

Still progressing, Work continued today, feels like a milestone is hit.

Pictures of the newly started tabbing, 1 Layer 450g CSM and 1 layer of 300g Roving.
Still to come is 3 more layers of csm and 2 more of the Roving covering the entire transom incl. some overlapping.

Dry-fit of the mat:

Wet mat, out of air.