I have a very slight gearcase leak. The gear oil is a little creamy but only a little. I have ordered a new seal set, but in the meantime, I have some Wynns HLPS transmission stop leak which is meant for any gearbox or diff on a car. Would you stick some in with a change of gear oil? Even if you don't think it would work, do you think it would do any harm? I have enough to mix with 1 litre of gear oil - which is all I need anyway.
My first thought is not to mix anything with gear oil for a lower unit, but then that would hold true for a car too.
What do you think?
Nick