hello everyone, I am looking for information if I can install a lower imco scx on an upper bravo 1? I have 2 upper one with the serial number 0W250 + and the other first generation. I am trying to reassemble the upper 0W250 in xr with teague stem I found a liwer imco scx 1.50 -2 I was wondering if I could settle on the upper

I dont think so, it has to be scx to scx but Ive heard you can install a SC lower on a SCX upper with a coupler change, would need a SC lower to mate up with the B 1 upper

Yes you can mount a SCX lower to a bravo upper. Pretty sure you’d need the adapter to connect the two vertical shafts, scx shaft being bigger than the bravo. But why do you want to do this?

i am looking to build a bullet proof outdrive, i live in montreal in canada we have very good outdrive builder but never want to get out of mercruiser santiers and parts are scarce and expensive

If TGW is correct thats news to me, but Ive been wrong before what kind of power are you using

575 sci

If you can mount a sc/bravo lower to a SCX upper, the reverse should be the same. I think I talked to Imco about this at some point. The SCX-4 however is a different bolt pattern and will not work. If you need one of these let me know, I just dug a brand new one, still in the bag out of my tool box the other day. https://imcomarine.com/cal_store/scx-sc-coupler.html

the only thing that worries me is the length of the vertical shaft, this will join my upper shaft

Vertical shafts are same lengths, just different diameters.

I’d be doing the opposite... bravo lowers have much less issue than the uppers

Plus SCX lowers aren’t as hydrodynamically efficient