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-   -   Would a Bravo 2 fit on a 4.3L engine (https://www.offshoreonly.com/forums/general-q/377157-would-bravo-2-fit-4-3l-engine.html)

Dandan 09-20-2022 07:11 PM

Would a Bravo 2 fit on a 4.3L engine
 
I have a 4.3 with an alpha 1 Gen 2 that stained some pretty bad damage instead of replacing or repairing I have the complete setup for a Bravo 2 my question is would that stuff fit on the 4.3 L engine I know the bolt pattern on the back of the motor will be the same but not sure if the flywheel and stuff would all fit the motor that the Bravo 2 was on was an LS6 don't really want to pull my motor out to find out I can't do it

TomZ 09-20-2022 11:36 PM

A Bravo 2 is a large lower case drive meant for commercial apps and houseboats. It’s made to swing a large diameter prop. Are you sure it’s a Bravo 2?

Your 4.3 only needs an Alpha and they are rather cheap across the board. Stick with what you got.

AllDodge 09-21-2022 07:01 AM

My guess is you mean a B1 and if you have an Alpha on it now, the Bravo will not fit. Would have to replace the transom assembly

Dandan 09-21-2022 04:48 PM

I was told it was a bravo 2. But it was on a speed boat so probably a bravo 1 then with an LS6. I have the complete step up including the blown up LS6.

AllDodge 09-22-2022 06:58 AM


Originally Posted by Dandan (Post 4845722)
I was told it was a bravo 2. But it was on a speed boat so probably a bravo 1 then with an LS6. I have the complete step up including the blown up LS6.

Having the complete Bravo setup (transom assembly to prop), then yes the bravo drive shaft will fit into the Alpha coupler

tmmii 09-22-2022 07:02 PM


Originally Posted by AllDodge (Post 4845785)
Having the complete Bravo setup (transom assembly to prop), then yes the bravo drive shaft will fit into the Alpha coupler

Yep. And the outer plate on the gen 2 and bravo is the same so it won’t need any holes drilled. You would need the seawater pump.

Bravo will weigh more and take more power to turn. You would need to see what ratio it is. That all being said I would buy and sei and use it. A lot less work and they boat will run better.

t500hps 09-22-2022 09:49 PM

The transom assembly is different.....so the motor has to come out to replace the entire transom assembly.
The Alpha has a water pump INSIDE the drive....the Bravo does not (requires engine mounted seawater pump).
I believe the B2 is a deeper running/bigger drive meant for express cruisers. Will likely run too deep on your boat AND the prop likely has to be switched.


SEI makes a Alpha knockoff that comes with a good warranty......just buy one of those.

rak rua 09-23-2022 06:19 AM

I can’t answer your question but to help clarify what you have, here’s the Bravo 1 and Bravo 2.
The Bravo 2 is the one with the straight/vertical trailing edge. It’s like an overweight commercial version of the sportier B1.


https://cimg3.ibsrv.net/gimg/www.off...2edde54b4.jpeg
https://cimg4.ibsrv.net/gimg/www.off...3b97bdbed.jpeg
RR


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