I am curious as to why? what is the advantage to a TRS upper? What is the advantage to a Bravo lower? Is it because the propshaft on the Bravo is a 1.25" XR shaft?

The trs has a strong upper the lower is the weak link,the trs uses angle cut gears in the lower and will break with some power the bravo lower uses straight cut net forged gears and are much stronger,i would think if there were more trs boats still around someone would build some straight cut gears ,billet carrier and 1.25 prop shaft,i don't think there is enough still around for this to happen,a konrad drive is pretty close to that idea

It's gonna be 1.68 for now. I'm using what I have from left over crashed drives to get this project started

Good idea, I think there are more than you realize.

Looks great and a great idea

How do you reverse the rotation?

Mark

That's the big issue right now for doing a twin conversion but I'm working at it. On my deal being a single and left steer I'm gonna switch to a left hand prop to make it drive forward in forward gear.
It's kinda screwed up that merc made the lowers different on the trs instead of the uppers as far as left and right goes.

Lock it in reverse. Make new gears ?
Great job buddy

My twin trs would need a reverse rotation motor. So if your lowers hold up it be worth it . New cam and dist. Gear firing order reversal.

I get 100 hours on a right lower and left never goes. Helical cut always pulls teeth. Trs needs straight gears like speedmasters.

EDIT...
Transmission can not be modified for rotation.
Thanks Marc

http://www.marinemechanic.com/fpdb/B...ers-Manual.pdf
http://www.baadteknik.dk/Manualer/Mo...elvetDrive.pdf