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Old 03-01-2005 | 10:56 AM
  #11  
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Default Re: XR vs ZR

i have heard of more trouble out of the xr gears than i have the xz's
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Old 03-01-2005 | 11:14 AM
  #12  
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Default Re: XR vs ZR

Originally Posted by khadley
i have heard of more trouble out of the xr gears than i have the xz's
Me too. and the helical cut gears of the XZ seem to last longer as long as it's a relatively mild combo.

From what I've seen up here, the XR gear set is toast at @100 hrs.
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Old 03-01-2005 | 11:30 AM
  #13  
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Default Re: XR vs ZR

i know a few guys including myself running the xz's with 800 plus hp and they are holding up great i put 375 hours on mine before any problems the shifter bolt backed out and went thru the gears locking the drive in forward not really a gear issue
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Old 03-01-2005 | 04:40 PM
  #14  
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Default Re: XR vs ZR

I have 3 seasons on my XR with the Max Machine top cap and no upper gear problems. I'm way over Merc's recommended hp.

Last edited by GPM; 03-01-2005 at 05:50 PM.
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Old 03-01-2005 | 06:56 PM
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Default Re: XR vs ZR

My .02... If you have enough power to break the XZ gears, which are atcually just X gears with the thicker floor and shorter bearing, then step up to the XR gears. They are straight cut, but they are net forged.. I guess hammered into shape instead of being machined. The XR's are softer and do wear out relatively quick. I was told 200-250 hrs or so. Set up is important to get proper alignment on the gears for maximum life.
So you try XZ gears or talk around, see what others have had luck with. If your running much over 700hp in a heavier boat, then lean toward the XR's and pay the price. I am not sure that CP could offer the XR gears for that figure mentioned before. They are better than twice that from Merc. Thats the best Merc has until that new drive we all have been waiting for comes out. May not happen in my lifetime. So we pay the price to go fast. But where is the fun if you can brag about how many Bravos you have broken!!
Now I know there are some people that have had more HP and more time than the average guy. Why is this? It could be a set of parts made on a Monday or Friday, or the guy knows how to throttle or by chance that drive was setup extra careful on a Wednesday. Who knows, some live, some dont. The after market drives are making headway, but some people have had problems with them also. If you try hard enough, you can break anything.
Again, just my .02 and I am still learning about what breaks and what doesnt. Hope this helps.
Dick
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