Originally Posted by spydermann22
I changed my outdrive oil using Quicksilver gear lube before winter hit. I changed it as I always do pumping up from the bottom until it flows out of the vent hole, then I fill the reservoir to the cold line.
The fill process sounds incorrect.
1) Remove the screws on the fill and vent/inspection portts on the drive.
2) remove the cap on the overflow tank
3) Fill from the fill port (bottom hole) in the drive until it begins to weep out the vent/inspection hole (top hole) on the drive.
4) insert the screw with a new gasket on the vent/inspection port (top hole on the drive)
5) Continue pumping lube from the bottom of the drive until it begins to enter from the BOTTOM of the overflow tank. (Make sure to fill no further than the fill line)
6) put the cap on the overflow tank.
If you only fill to the inspection/vent port on the drive and then backfill from the overflow tank, you have a massive airbubble in the system.
I had often thought about moving the pump from the lower fill hole to the upper hole once the fluid reach the upper hole to avoid the resistance from pushing lube from the bottom once it becomes full.