I have a 1972 4HP Yachtwin that runs fine but I just dropped the lower unit oil and it's got water intrusion ( milky ).
The model is: 4236S-E02002
The (2) lower unit drain plugs each had plastic 'washer / gaskets' but truthfully I can't see how the plastic would keep water out. I am going to R/R them.
My questions:
- I'd like to flush the lower unit out so all the water and water-laden oil is removed. How can I do this ?
- I have a pressure and vacuum tester - what PSI should I pump to ?
Before I ask about a potential lower unit seal project, I'll check these things first.
Thanks !