Re: OMC 4.3L Overheating. Read all the other threads already....
Did you leave the clear hose on the raw water intake hose and look for bubbles when on plane?
The temp of 175, could be OK depending on how accurate those gauges are, if I recall from your vid they are the ones common in the late 80s and are kind of hard to read. My temp gauge has 160 in the middle, so mine warms up at 160, when idling through the channel gets to about 165, when planing goes to about 170, and if you come off plane and slow down fast it may go to 175-180 but will cool back down to about 165-170. I'd get an IR temp measuring gun from Radio Shack, they are pretty cheap and a very useful tool for measuring temps esp when you're not sure if your gauges are accurate. For reference, my engine when checked with the IR gun will run at 155-165 at the intake manifold under the thermo housing, the manifolds run from 115 at idle to 135 after running on plane. The bouncing of the oil gauge could be the gauge or a bad sender. My oil pressure runs from 40 cold idle to 20 hot idle, running is 55-65 or so...
Here is what you need (this is a GLM kit but I'm sure you can get OE stuff at a BRP dealer, or even a Sierra version)...the thrust washer goes on first (big silver on at left) with the TAPER matching the TAPER on the prop shaft, then the prop, then the copper colored spacer at the right, then the nut gets tightened, then the castellated retainer for the prop nut goes on, finally you slide a cotter pin through the opening in the retainer, thru the prop shaft hole and spread the ends.....
