With the speed at which that occurred (2~3 months) my thoughts go immediately to stray current corrosion.
Questions: - Is his keel grounded?
- Does your friend have shore power?
- Is he slipped near other boats?
- Does his shore power system have an AC-DC ground bond?
- Does his shore power have a galvanic isolator?
- Is his shore power main switch an ELCI?
__________________
Neil
1977 Catalina 30
San Pedro, California
prior boats 1987 Westsail 32, 1970 Catalina 22
Had my hands in a few others
|