I have a problem with a Hurth
which is leaking oil
from the back seal near to the coupling. The gearbox
is attached to a Westerbeke
4-107 which I understand to be similar to a Perkins
There are a couple of things, firstly the leak, which although a problem does not stop me going out. I am sure there is no problem with the oil
as we are now running a constant loss system. If possible I would like to know if by replacing the seal we will cure the problem or is the leak a sign of a far worse problem?
I also think that the prop which is currently on is of the wrong pitch
as our speed reduces from about 5.5 to 2.5 knots when we head
to windward in anything aproaching 20 knots. The CAV pump
on the engine
indicates that it is rated at 1850 RPM
but I am able to rev the engine
a couple of hundred RPM
higher than that if required but with no increase to the speed.
I have been offered a ZF12M which I am told will fit straight in if this is the case could anyone tell me what size prop and pitch
I would require if I were to change gearboxes.
Any help would be much appreciated.