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?