Pump ran great at the Tom Papp deal....comes out the hole HARD.
I fired the boat to run it 20 feet up on the trailer at the end of the day and had a strange groaning/whining noise.
Tore the pump down again tonight. Impeller looks good, wear ring looks untouched, bowl bushings look good, thrust bearing is somewhat audible turning the shaft by hand. The "wiggle" test with the impeller on the shaft showed .032" of clearance between the impeller and wear ring...which is a bit concerning. I cut the impeller before I had the ring, so I guess I deserved that. I was gonna yank the motor anyway...and it's easier than dealing with silicone on the transom plates, so I'll pop it apart and disassemble the bearing to see if something looks strange.
I used valvoline synthethic grease, per the A/T website...about 60 pumps or so....till grease was puking out of the bearing. Installed the driveshaft and wiped up the excess. I dunno. Koyo is a good bearing. Can't imagine that it failed this quick. I turned up a little spacer to use on the press when installing the bearing on the shaft so only the inner race was loaded...snap ring is snug against the bearing too. Maybe it's not the pump but I can't find any thing else that might make noise.
