Re: Gear Lube or 2 Stroke Mix?
Just my 2 cents... the gearcase is sealed. It has 3 locations where it is sealed against leaking and it can be pressure tested. In other words, it should not be leaking at all. It may be that because this is a new LU, it was refurbished, at which time excess gearcase oil found its way into the LU and is leaking out. If I were you, I would rule out a gearcase leak by looking up the pressure rating for your particular gearcase and testing that it can hold that pressure by using compressed air and a pressure gauge. If it holds the pressure, then don't worry about the leak. If it does not hold the pressure, then you most likely have a leaky oil seal. You could also have a crack somewhere, but let's hope it's just a bad seal. The 3 locations of the gearcase that have oil seals are the driveshaft, shift rod and propshaft. The propshaft seal can be accessed by simply removing the prop. The other two require dropping the LU. If your gearcase does not hold the recommended amount of pressure, then I would guess that either your shift rod or driveshaft seal is shot. This would explain how gearcase lube could have leaked into the body of the LU and is leaking out of that hole. I find it hard to believe that unburnt oil could make its way to that hole, but I could be wrong.
