When under sail we can hear one of the props grumbling/humming. When I put it in gear
(reverse) the noise
Aside from a bad bearing in the Saildrive
, what are the possible causes.
I recently has the Saildrive
(Yanmar SD31) apart and the bearing looked solid. Changed the oil seals
and oring on drain plug
. The seals
had been bent damaged and they unit was full of creamy gunk too thick for the drain hole.
Added fresh oil
, but now level is down 20-40ml, and when I stir the pot there's cloudy oil. (Could be residual cream that I didn't flush properly)
Don't think SD31s can be drained from the top.
Also there's an oil leak
of about that scale which manifests from the lower starter motor
bolt (flywheel seal on engine
side?) Hard to know if it's engine
oil. Could it be leaking from the top?
Is the gearbox lubricated from the SD or is there a sealed unit that might be dry? (Yanmar 3JH3E)