Twin DF 300 Corrosion Issues
Have "08" 300's - Have had to replace both trim tilt assembly's in "09" after assembly corroded where SS pin runs through the lower part of assembly.
Corrosion was so bad the o-rings blew out within a month of each other on each engine.
Now I'm seeing corrosion starting all over again in the same locations , in addition to about 1/8" deep marble size indentations in the lower unit above the prop shaft.
This boat is on a lift & out of the water, I'm lucky to get out 5-6 times a year, what is causing this corrosion & how do I stop it?