HI There, I have a double
pump om my MD17C, it is made by Sen Dure in the
USA, I have been having issues with mine as the
raw water seems to pull the fresh water through the
seals thus after 10 min or so running it drains my fresh water
coolant. I have replaced the
seals several times but cant get it to stop!
The only thing i can think of is that there are some tiny scores in the
pump drive shaft that are letting the water through
Sen Dure have non returned my requests for
parts etc
So I was at sea crossing the pacific when this problem came along and in the end I converted the
engine back to
raw water thus making both outlets run a positive feed to the
engine and it has worked fine
Only problem now is to convert it back - I am currently using an
electric pump for the fresh water but I wish i didnt have to