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-   -   transom ? (https://www.offshoreonly.com/forums/detailing-painting-fiberglass/351919-transom.html)

Duck Diggler 01-24-2018 08:27 PM

It appeared to be two 3/4 ply laminated together. believe Im going to go with Marine ply and Ve resin. Using 1.5 oz mat and 1708 which is my goto combo anyway. I just cant justify the cost of the coosa board. Normally I would just use poly resin, but I think Ve is a step above poly and just as good as epoxy in my situation. Im doing Trs conversion to Bravo setup and I think I 've settled in on a 2" higher x dimension. Certainly open to suggestions or reccomendations or personal experience on this one. Not sure on distance between seat and transom. Didnt have much space in front with the trs setup, so looking forward to gaining a few inches there.I'm usually an outboard guy.

Duck Diggler 01-24-2018 08:32 PM

It appeared to be two 3/4 ply laminated together. believe Im going to go with Marine ply and Ve resin. Using 1.5 oz mat and 1708 which is my goto combo anyway. I just cant justify the cost of the coosa board. Normally I would just use poly resin, but I think Ve is a step above poly and just as good as epoxy in my situation. Im doing Trs conversion to Bravo setup and I think I 've settled in on a 2" higher x dimension. Certainly open to suggestions or reccomendations or personal experience on this one. Not sure on distsnce between seat and transom, wasnt much clearance with current setup. looking forward to gaining a few inches.I'm usually an outboard guy.

class6 01-25-2018 05:19 AM

Some things to think about
17 1/2 X up to 18' and maybe space back down
When you mount your transom assembly. Bravo Hp preferably, Get a ITS input shaft and mount the motor seven inches forward from standard on the assembly location.

endeavour32 01-25-2018 06:13 AM

If you need an ITS input shaft, let me know. I have one that is in excellent shape. that I no longer need.

outonsafari 01-25-2018 07:23 PM


Originally Posted by class6 (Post 4606681)
Some things to think about
17 1/2 X up to 18' and maybe space back down
When you mount your transom assembly. Bravo Hp preferably, Get a ITS input shaft and mount the motor seven inches forward from standard on the assembly location.

heck yeah move it forward, specially if you work on it yourself.
was this boat borg warner or merctrans ?

search "moving the engine forward" oso thread.
there are a hand-full of threads on the subject, and start posting some pics as well, everyone loves a good build thread

Duck Diggler 01-25-2018 08:03 PM

I have an Hp assembly, Im using and It has/had a merc trans. What are the advantages of moving it forward the 7"s ? That would probably almost put me back to where the trs setup was. What is the factory x measurement? Im assuming 16" or so. Havent figured out how to post pics yet. Class 6 is your name Dan
I believe its your old boat. i bought it from lake george.

Duck Diggler 01-25-2018 08:30 PM

unable to post pics for some reason.

class6 01-25-2018 09:29 PM

Yes it was

Unlimited jd 01-25-2018 10:14 PM


Originally Posted by endeavour32 (Post 4606258)
What I was told, is that if you're going to run modest to big power you have to use plywood for the transom and engine stringers. Anywhere else you can use Coosa. I'm about to glass in my new transom, and I'm using 3 layers of 1/2 marine ply, with a layer of 24 oz woven roving in sandwiched between. Then to actually bond it to the boat, Core Bond B70 and 1708 glass.

outerlimits doesn't use any wood at all, I don't think I've seen a boat come out of there in over a year with less than 1100's

outonsafari 01-26-2018 02:08 PM

the reason for moving the engine forward is balance (longitudinal center of gravity)
i do not have any seat time with this set up and therefore cannot prove or report how it would perform.

however,
based on reading what the race boat guys say on the subject of balance, ballast, and finding cg on a boat,
it was a matter of knowing (by reading) who spent the money, did the testing, made changes/modifications, who race
or who has raced, and then put their findings out there,
the engine in my boat gets installed 12 inches forward on an imco input shaft based off the above info.

as example a link and a video (the video in case it doesn't link) is the plum loco pantera, it's the go to video of video's for a balanced
good running boat. time of the video, it was powered by a small block moved forward with a driveshaft.

https://www.offshoreonly.com/forums/...cing-boat.html



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