johnlomant

I have a bravo x on my 04 nordic heat. What is the deal compared to a xr bravo 1 or xz. I have a 500 efi and I am installing a supercharger. I just bought a imco lower but need to know about the upper. Thanks John Lomant

fountain4play

Here's a link that does a good job of detailing the differences and might be of some help...

http://www.mercurymarine.com/engines...ecs.php?ID=120

Mr Gadgets

John,
If the new setup makes gobs of midrange torque, and you drive it wrong.. you will end up knocking the teeth off the pinion gear. But if you drive it with respect.. you may just make it work.
The X has the thick floor helical cut gears, and a steel tower in the case. Those are good things! If you make/use enough torque to break teeth, then you will have to go to XR gears in that upper. Even those can be broken, but the chances are less with the stronger XR gears and proper setup.

Hope this helps.. if you have any questions... fire away..

D*ck

Griff

Basically, the Bravo X is an XZ upper with a standard bravo lower.

JohnTheDriveMan

Bravo X drive has spiral gears in upper. XR has straight cut gears in upper. Only difference.

Mbam

See if this helps:

http://go-fast.com/mercruiser_bravo_sterndrives.htm

Mr Gadgets

Marc,
That was the chart I was looking for.. Thanks!!

fountainfevr

Help me out. I have a 2000 Fountain with a 502 mpi. I dont run my boat hard but I still ended up breaking a tooth off my pinion gear have to have a new upper gear set. cost me 1500. have arizona speed and marine ECM, roller rockers and lighting headers also have MSD ignition. Should I change the drive or stay with Bravo one?

Mr Gadgets

How big is the Fountain?? Single or twin?

fountainfevr

27 fever single engine