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Offshoreonly.com (https://www.offshoreonly.com/forums/)
-   Drives and Lower Units (https://www.offshoreonly.com/forums/drives-lower-units-217/)
-   -   Bravo derivative to handle 750HP (https://www.offshoreonly.com/forums/drives-lower-units/284217-bravo-derivative-handle-750hp.html)

Panther 04-15-2013 08:08 PM
5 Attachment(s)
Originally Posted by 1 MAIDEN AMERICA (Post 3906143)
That's the problem with the newer XR gears. No metal on the magnet because the faces hold up great. A tooth just decides to let go nowadays. My last one busted a tooth. Rotate the gear 180* and it looked perfect. It didn't get chewed up because it locked up and broke the stub shaft in the coupler.
Been there and done that in 2005 with Imco Extreme SC's. How they dealt with it sorta burned me on the IMCO brand. Glad I got rid of Bravo's.

richanton 04-16-2013 02:50 PM
What brand top cap is that? is the drive shower integrated into the cap?

Uncle Dave 04-16-2013 08:56 PM
Originally Posted by 1 MAIDEN AMERICA (Post 3906143)
That's the problem with the newer XR gears. No metal on the magnet because the faces hold up great. A tooth just decides to let go nowadays. My last one busted a tooth. Rotate the gear 180* and it looked perfect. It didn't get chewed up because it locked up and broke the stub shaft in the coupler.
X2

Same exact thing on an 8 hour old drive going 30 MPH. Just above plane in zero visibility on radar heading to long beach.

Never got a chance to beat on anything - tooth went - and the whole train stops... snapped shaft ...same deal.

Have about 100 hours of the rebuild mostly from easy lake running.

UD

Panther 04-17-2013 10:46 AM
Originally Posted by richanton (Post 3906837)
What brand top cap is that? is the drive shower integrated into the cap?
That is the top cap from an IMCO Extreme SC. They integrate the shower into the top cap.

When I blew this drive the plate which bolts to the top cap (it looks like a disk) also blew off. My buddy who was running next to me saw a shiny, sparkly thing fly through the air moments before the drive blew apart. :poopoo:

waconda 04-17-2013 12:27 PM
Someone needs to catch that with a go pro.

PatriYacht 04-17-2013 01:35 PM
Can an IMCO SC lower be used with a BMAX upper?

Panther 04-17-2013 02:11 PM
Originally Posted by PatriYacht (Post 3907534)
Can an IMCO SC lower be used with a BMAX upper?
Yes, but you'll need a BMax vertical shaft. Basically a BMax vertical shaft is a little shorter and has larger splines. There was a member here on OSO that had a setup just like that on his Fountain with 800's.

tjhuyser 04-24-2013 09:26 AM
Originally Posted by johnnyboatman (Post 3769748)
on a twin application if driven correct the xrs will survive
on this forum, driven correct would be wide open as often as possible, right???:cool-smiley-011:

Back4More 04-24-2013 09:44 AM
Originally Posted by Rik (Post 3770643)
To bad you are limiting your options to a Bravo style drive
With all the XR's and IMCO extremes i went through i should have went the Arneson...but at that point i was commited to a Bravo config.
If i could turn back time it would have saved me thousands.
But my Max's and Modified IMCO lowers are surviving.

Back4More 04-24-2013 09:52 AM
Panther, I made XR/IMCO salads just like those... LOL

BTW, I need to see that video again to get me in the mood for the season. Link please :)


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