Gear oil in bilge

See sig for drivetrain info.

I just replaced my water impeller, so I had drained and refilled the oil in the drive. I used squeeze bottles of 80w-90 oil and squeezed about 1 quart into the drain hole on the front end of the bullet. I squeezed in the oil until my squeeze bottle was giving me excessive resistance and the drive wouldn't take anymore oil.

I then put about 1/3 quart into the top hole into the drive, until the oil level was flush with the hole.

I took the boat on a 1 hour test run. When I pulled the drain plug afterward, about a pint of gear oil drained out. I obviously overfilled it.

Did I do any damage? Did I blow a seal? I find it unsettling that oil exited the front of the drive and traveled through the gimbal bearing and bellows.

I pulled the drain plug on the bullet and the oil was fresh and clean. The top hole was lower than it was when I filled it.

Re: Gear oil in bilge

Aside from filling it wrong and getting away with it,no
you remove the top and bottom plugs to drain it.
To refill: add oil from the bottom hole UNTILL it comes out the top hole.Install top plug, install bottom plug.
I`m guessing you had the leak prior to the pump job are were low on oil to begin with.

Re: Gear oil in bilge

Its the drive yoke seal thats leaking. Had this happen on mine about 2 months ago. Its probably leaking through the bellows and then down into the bilge. Remove the drive and then the drive shaft and replace the seal.

Re: Gear oil in bilge

I imagine you did not do a pressure test after you did your impeller change / drive reassembly? (and you really should invest in a gear oil pump.... about 9 bucks on Amazon).