Transom rot !!

[shaw520]

Re: Transom rot !!

Wood is in and glued, allowing cure time. Glass should start tomorrow night.

 

[Yacht Dr.]

Re: Transom rot !!

Hello Shaw..

You should consider beveling those sharp edges before you glass... ( woulda made less mess in your work zone if done out of the boat m8.. ).

YD.

 

[shaw520]

Re: Transom rot !!

double post

 

[shaw520]

Re: Transom rot !!

Hello Shaw..

You should consider beveling those sharp edges before you glass... ( woulda made less mess in your work zone if done out of the boat m8.. ).

YD.

Beveling the edges will be done before glassing.

'Work Zone' you say? ... good point there Doc, wish I could be in a perfect world,..cept' Im working alone as efficiently as I can, with limited time to complete,..(I have a real job). Working within the boat is saving me tons of time climbing in and out,... besides I have a very good shop-vac

If you look closer you will see that on the port side, the transom rot continues past the inboard stringers, .. so I needed to maneuver the transom section in before attaching stringer & brace sections. Its piece work at best because the rotted sections are isolated.

Genuine Question; Cut key hole now??,.. or glass before cutting?. whats better?

 

[Itsalonestar]

Re: Transom rot !!

Very true....angle joints work fine for house trim, but don't want them where strength is a consideration. With the glues being stronger than the wood fibers they're holding together, any type of overlap joint is very strong.

Oops:

Not to be too picky but a lap joint and a scarf joint are different.

A lap joint is where one piece of wood is overlapped by the other. Usually each piece is dadoed in half.

A scarf joint is where they both are cut on an angle and then jointed together. Usually this is done at 45% angle but can vary. Scarf joints will usually used where movement will not expose what is in behind, usually for cosmetic reasons.

Worked in the Shipyards in Ontario growing up......learned a couple things from the shipwrights. Carpentry on boats is the most challenging work of all.

In this case I agree with you that the lap joint would be the better choice. I would also use wooden dowels to pin the joint for some added strength. Not that it would need it as the glass and matt will do a job. Just my finicky way of doing things.

Cheers.
Glenn.

 

[Itsalonestar]

Re: Transom rot !!

It's a shame boat builders use materials in critical areas that are destined to fall apart....a sad commentary on the industry in my opinion. Had an old 70's Starcraft tri-hull that got in that shape, and my cure for that was to cut it into 2 foot square sections and let the garbage men haul it away. But for the rotted cross members and transom, it would have lasted for generations. I probably would have gone to the effort to salvage, but I never liked the flopping up and down slappety-slap ride that particular design gives in rough water.

Its a 1980 Thompson Sportmen that Ive owned for nearly 20 yrs, I put a fresh 165 Merc in end of last season and runs great, this season I discovered the transom rot. Vacation planned for Aug 22nd, so I need to get the transom rebuilt, engine and drive back together before then.
Tell me,... why do some of these manufactures neglect to glass the inside transom ????

 

[shaw520]

Re: Transom rot !!

bump

Cut key hole now??,.. or glass before cutting?. whats better?

 

[shaw520]

Re: Transom rot !!

All glassed in, next step cut key-hole seal edge, apply paint and reinstall power. Bumped my vacation to 2nd week in Sept, just wouldn't be a vacation without the my tug.

 

[shaw520]

Re: Transom rot !!

Next issue Im going to ask for opinions; As mention earlier in this thread, what caused the transom to rot was a series of screw holes that mounted the swim platform (four holes @ four locations across the transom that left several spider cracks in the gelcoat) So, in an effort to to seal the holes/cracks and at the same time give the swim platform/transom more structure.. I thought about glassing over the holes/cracks, and attaching a piece of 5/4" X 8" X 6' teak right over the old holes.. then mount the swim platform to it... like in this awesome drawing I made! ?? Opinions??

 

[jonesg]

Re: Transom rot !!

Instead of screws which work loose from the load and allow water in,
try thru-bolts with backing washers and bed with 5200.

 

[shaw520]

Re: Transom rot !!

Instead of screws which work loose from the load and allow water in,
try thru-bolts with backing washers and bed with 5200.

Ok, I planned on using SS bolts going all the through, but what exactly do mean "bed with 5200" ??

Thank you Shaw