OK Laveyman,
You are smart to do this now, I had to do it on the lake this year because I was too lazy to do it before putting the boat in the water. Best to get the whole repair kit to replace the housing, wear plate and shaft seal, not just the impeller. The kit also comes with new bolts, nuts and washers.
1. Remove the belt
2 Remove the hose clamps and hoses on the back of the pump
3 Remove the pump attachment from the engine.
4. Disassemble the pump (6 bolts I think) and remove the old impeller.
5. Discard the old housing.
6. Insert the inpeller into the new housing and twist the vanes so that they point in the direction they will be running in (important).
7. Replace the shaft seal "O"ring on the pump mechanism.
8. Install the new wear plate
9. Re-assemble the pump
10. Install the pump on the engine
11. Hook up the hoses.
12. Re-install the belt.
If you have had any of the impeller vanes come off and cannot account for them, pull the hose off of the output side of the oil cooler (the hose that supplies the engine with water) and (before reassembly) flush water through the hose toward the pump. It is a good idea to make sure the impeller chunks are not in the oil cooler or they could end up as obstructions in your water jackets.
[ September 26, 2003, 04:45 PM: Message edited by: Dr. Eagle ]