I made the unfortunate discovery that my saildrive
leg has corroded leaving my saildrive oil
nice and milky. A dive inspection
revealed the corrosion
as the culprit of the oil
color. Somehow the anode was only slightly corroded, meaning it did not make good contact with the aluminum
body of the saildrive. Also, it seems the saildrive is not electrically isolated from the engine
as expected from a penta
. A resistance measurement reveals 0 ohms from engine
. The corrosion
happened so quick (2-3 months) that it had to be an electrical
leak, as opposed to standard galvanic corrosion.
It seems as though I have no option other than to rebuild
the gears into a new housing before the water
in the oil starts to corrode the gears.
I will get the opportunity to have my boat out of the water
for 2 days. Instead of doing a rush job I want to remove the saildrive leg, plug
the hole with a custom plate, and put the boat back into the water. This will give me ample time to rebuild
the gears into the housing.
I know that to remove the entire sail drive, the engine need to be removed so that the sail drive unit can be lifted upwards out of its mounting. However I would like to remove the leg only. From beneath the boat. Disconnect it from the transmission
and then pulling it downwards. I need to know if this is possible and if the transmission will leave a flush cavity that could be plugged with a custom cap, before launching the boat back into the water.
The attached image will explain what I am trying to achieve. I would like to know if anyone has ever removed a saildrive leg from the bottom, as opposed to the standard way of sliding the engine forward and removing the entire saildrive upwards out of the boat.