Trojan 10.8 meters Flybridge repair

[Crabat]

I have a 1986 Trojan flybridge recently rebuilt. I installed new yanmars 315hp

The boat was running great (20 knots cruise, 25 knots top) until severe vibrations started to show. I assumed It must be due to damage to prop or something like that. I lost a shaft and prop, and the other shaft has a crack ready to break.

The boat was pulled up on a trailer for maintenance when I noticed a small "hump" un the outside of the hull, right where the bridge support is ( I assume that is the A strut - perpendicular to the boat lenght) wich correspond tho the back wall of the engine room. The hump resembels as if something heavy was leaning against it from the inside. On the other side of the hull, there is also a smal mark at the same level.

I chequed the strut and it was completely damaged wood.

My question is, is it worth ir to replace it and fix it? Or is the damage such as this not worth the effort?

I am really happy with the boat and would hate to lose it. What concerns and precautions should I give the fiberglass repair man?

 

[commander315]

Re: Trojan 10.8 meters Flybridge repair

The Damage probably isnt worth the effort or money on an 86. But those are great looking boats, so if you'd hate to lose it, go for the repair.

 

[erikgreen]

Re: Trojan 10.8 meters Flybridge repair

Actually it might well be worth it... it won't be as valuable as a new boat, but it'll be a lot cheaper than buying a new one, and if you like the boat, well...

I did a similar repair on a 1979 model. The wall at the back of the cabin (and the front of the engine room) had rotted. We removed the interior back there, replaced the wall, and put it all back together, and we're still using the boat. The only problem is that we didn't support the fly bridge well enough when we did this, so it sagged a bit and is an inch lower than it was. On the up side, it drains better

If the rest of the boat runs and you know what's wrong with it as far as problems, I'd repair it and keep going. While you're having repairs done, check the rest of the structure for rot too... get it all fixed at once, and you'll have a boat to use for years.

Erik

 

[Crabat]

Re: Trojan 10.8 meters Flybridge repair

The boat was running great since I bought it and restored it.

I will check the rest of the structure. Some parts were replaced at the time of restoration but those two wall and under the deck were not looked at (I regret it now ).

I also plan to put a couple of extra reinforcements to the structure to avoid further damage due to new engines torque and speed (compared to original specs). Any suggestions on this?

I assume these repairs will eliminate original vibrations on the hull and the breaking of the shafts. Engine allignment, balancing of new shafts and props will also be made. Any other suggestion?

 

[Crabat]

Re: Trojan 10.8 meters Flybridge repair

One more question. Since I bought the boat 4 years ago, I have not been able to determine a few specs:

Fuel capacity?
Gross weight?
Exact Beam?
Lenght (I measured it at 36 feet?)
Draft?

I would assume it is impossible to obtain at least a drawing of the structure of the boat to serve as guideline for repair, is that correct?