Originally Posted by srt
I have also a an SD50 saildrive
and reading online posts disturbed by issues that are highlighted, one being water
in the oil
caused by pressurization and contraction, the other that the GL5 Quicksilver is not suitable as it attacks yellow metal, the bronze
thrust washers. It seems that GL4 spec oil is more suitable for the SD50
This video shows a comprehensive upgrade kit, I have not gone down that path yet, but it looks to have merit.
I have owned the boat
for less than a year, the previous owner had just before my purchase
done a complete rebuild
on the leg because of water intrusion. The motor
had only done 250 hours at that time.
On that, I am looking at replacing the dip-stick with an adapter and hose tail (ours does not have the clutch
and vent plug
in the video).
A clear hose then leads up to a small header tank. This takes the oil-level in the lower gear
case above water-level, and therefore removes the issue of water pressure forcing water past a worn seal on the output shaft, into the oil.