:wink:Hey Everyone!, I am having some trouble with my 1985 Merc 25XD. I made the cardinal mistake of working on the motor, and changing the setup at the same time, and now I am unsure of where the problem is coming from! Here is what I did. While finishing up the rebuild of the 85 Bass Tracker I bought last year I installed a new water pump impeller, and replaced the old dinged up prop, and rebuilt the carb too. Everything went without too much hassle, but NOW it seems like the motor is loosing it's "bite" in the water when around 2/3 throttle. It will be running and pushing the boat up an plane well, then it seems to lag for a QUICK SECOND and it seems to not want to drive the boat on plane well!:confused2: I put a carb kit in the carb, and it now starts VERY WELL, and Idles well too! the water pump impeller swap went OK, but the book was unclear on where to unhook to shift rod so you can drop the lower unit, and I took off the linkage arm on the left side ( if looking at the front of the motor) that links with a metal rod to the remote lever, and then I figured out where you are supposed to unhook the shift rod!!!:embarassed:oooh: So I put the "arm" back to where the rod allowed it to be put back on the splined rod, that seems to be OK.???Well it turned out to have a perfectly good impeller, so I did all of the work for NO REASON!!!:confused2: So the other day before going out on it's first trip with it's new carpet, console, and all the other stuff we did, I installed the new prop. It is a COMP-Pro Composite prop, and is 4blade, 10" Dia and a 13 deg pitch. After finally finding the props part # off of the original ( too Me) prop, I looked it up and found it be a 10 3/8" x 11 deg prop. So I am wondering weather it is the prop "Slipping" in the water and loosing it's bite, or if the shift link arm is 1 spline out of adjustment and it is causing the lower unit to be slipping out of gear under a load, or what????????????oooh: Also at WOT it is only running at barley 5,000 RPM's. I am unsure of what the RPM's were before, as I didn't have one installed on the boat before the remodel. The book says the motor should run between 5,000 -6,000RPM. PLEASE HELP, if possible?????:confused2: Andy P.S. Sorry about the long post!!