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Bravo drives

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Old 11-02-2005, 10:20 AM
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Default Bravo drives

Can anybody tell me what the exact differences are between a Bravo Xr and a Bravo XZ drive. I know that XR's have straight cut net forged gears and can handle more HP, but I know nothing about XZ's

I need to to know which one would be better to put behind 750hp blower motors.
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Last edited by Smitty; 11-02-2005 at 11:02 AM.
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Old 11-02-2005, 10:45 AM
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Default Re: Bravo drives

The only difference between a XR and a XZ is the top gear set. They both have the same lower unit shafts and guts.

The top end is straight cut on a XR and helical on a XZ. I have had both and never had any problems out of the top gear sets Just the lower units.
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Old 11-02-2005, 10:51 AM
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Default Re: Bravo drives

The XRs do make more noise than the XZs, I ran 700hp thru XZs for two years without a problem
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Old 11-02-2005, 05:30 PM
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Default Re: Bravo drives

Quote:
Originally Posted by BBB725
The XRs do make more noise than the XZs, I ran 700hp thru XZs for two years without a problem
Wish I could say the same.
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Old 11-02-2005, 06:26 PM
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Default Re: Bravo drives

Here's a breakdown of the differences between them:
http://www.go-fast.com/mercruiser_bravo_sterndrives.htm

I have XR's

Even though I had to put a pinion gear
and a vertical shaft bearing in the starboard
drive, and had to replace the complete upper
on the port, due to a gear failure, that broke the housing.

I don't know if it was due to bad material in
the gears, or the former owners operating habits,
or if it's that they just have a shorter
useful lifespan( the gearsets)???

I bite my tongue and say that XR's are
probably your best bet.
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Old 11-03-2005, 03:56 PM
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Default Re: Bravo drives

Thanks J.T. !!! Good info. It looks like the XR is the better of the two. I am also looking at Imco, Teague etc.
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Old 11-03-2005, 04:50 PM
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Default Re: Bravo drives

Quote:
Originally Posted by Smitty
Thanks J.T. !!! Good info. It looks like the XR is the better of the two. I am also looking at Imco, Teague etc.
Stay away from Imco, email Pather for his experience of bending over for them. They wouldn't stand behind brand new drives that had an assembly problem. They suck!!!
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Old 11-03-2005, 05:25 PM
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Default Re: Bravo drives

At probably a few $$$ extra, you can get a set of custom built drives from TNT. XR uppers, with custom TNT HD cap, Imco gears, shafts and Imco sportmaster lower.

700 hp/770 lbs torque.
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Bravo drives-1-dsc00666.jpg   Bravo drives-1-dsc00667.jpg  

Last edited by expresscat39; 11-03-2005 at 05:49 PM.
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Old 11-03-2005, 08:08 PM
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Default Re: Bravo drives

Quote:
Originally Posted by expresscat39
At probably a few $$$ extra, you can get a set of custom built drives from TNT. XR uppers, with custom TNT HD cap, Imco gears, shafts and Imco sportmaster lower.

700 hp/770 lbs torque.
IMCO doesn't make the gears, they use the merc gears, they only make the shafting and other misc. stuff. The only thing some of they do is cyro treat them on occaision, which anyone can have done.
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