Home › Forum › Ask A Member › Evinrude Lowere unit leak question › Re: Evinrude Lowere unit leak question
Perhaps the gasket between the upper seal housing bushing and gearcase is bad. Pressure testing without the impeller housing screwed down snuggly can lead to this problem…The pressure pushes the housing up and off the gasket, sometimes ripping it…
Unfortunately, a cracked or porous housing can cause this problem as well.
Tell us more about what work has been done to this gearcase. Did the gearcase have water in it prior to the work?
I just reread your post, you mention that there was no obvious leak around the driveshaft seal….Did you pressure test without the impeller housing screwed in place? If so, hopefully you just have a bad gasket underneath the upper seal/bushing housing which is allowing pressurized oil to pump into the water inlet galley underneath the housing….