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I'm a little freaked out about some of the stuff I'm reading online about the upper gears sets in Merc outdrives being crap and needing to be replaced every couple hundred hours? Sounds like most of the people having problems are running alot more horsepower than I am. I'm pretty sure I have a XR drive my serial number is OM 108945. Been trying to look up to see exactly what year? Can anybody on here run that number thru Mercnet? Mine as far as I know has 137 hours on it and is hooked to a 500EFI that looks pretty stock. I was planning on changing the fluid probably going to use that Lucas M8? Should I inspect those top gears as well?
 

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Your drive is a 2002 XZ. That means it has the same helical upper gears as the Bravo One, not the net forged as in the XR.

According to Mercnet this is the starboard side. Is this a twin? How big is the boat? Where do you run it? Ocean or lake? If the drive stays in the water and does not see a lot of "flying" and re-entering under power, it will last a long time as long as you keep the gear lube serviced.
 

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Discussion Starter #3
Your drive is a 2002 XZ. That means it has the same helical upper gears as the Bravo One, not the net forged as in the XR.

According to Mercnet this is the starboard side. Is this a twin? How big is the boat? Where do you run it? Ocean or lake? If the drive stays in the water and does not see a lot of "flying" and re-entering under power, it will last a long time as long as you keep the gear lube serviced.
Thanks for the info.This is a single on a 29' Nuera Laveycraft. I will be running it mostly at high altitude lakes, Blue Mesa, Powell,Western US. Would love to do some small trips in the Ocean. Would you stick with the Quicksilver lube or go to something else? I could swap out the upper gears for the net forged ones? Thanks for your help.
Greg
 
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