I have had our local Force mechanic do work on my 1986 85HP Force motor...he replaced the pinion gear, forward gear and reverse gear rebuilt the bearings and water pump...first go round...then the drive saft striped at the pinion and ruined my pinion and forward gear again ( from what I could tell maybe the driveshaft nut was not torqued correct?)...he is highly recomended by the local marinas...but I have lost faith. Today he told me to run my new gears and driveshaft in...then drain and replace the lower unit gear oil...after 1.5 hours at 4k RPM...now I have a milkshake for lower unit oil. Can anyone help? I am in NC...my next move is Lake Norman marina...but not sure if they work on Force...I feel sure he forgot to put in a seal or did not use the right shim? 