Corrosion on Alternator cable

pcmpete

For the longest time I have had an issue of my starboard battery voltage being lower then port.  I did some digging around at the terminals and found corrosion on the alternator positive cable.  Lucky enough there is enough cable for me cut and add a new terminal.   Hopefully this solves my issue. I plan on doing the same on the port side. 

PickleRick

I can't tell from the pics if you've applied it or not but dielectric grease is great for preventing corrosion on all your electrical connections.   Just don't apply more than you need as it can drip when it gets hot, getting on stuff that doesn't need to be greased.  I'm not sure they do that from the factory, really should 

pcmpete

PickleRick said:

I can't tell from the pics if you've applied it or not but dielectric grease is great for preventing corrosion on all your electrical connections.   Just don't apply more than you need as it can drip when it gets hot, getting on stuff that doesn't need to be greased.  I'm not sure they do that from the factory, really should 

the photo is the old terminal.   I have not replaced yet.  Waiting for my terminals and crimper to arrive.  I will report back afterwards.  Hopefully this cures my charging issue.  

YYZRC

Did you check your connections at the charging breakers (at the DC panel behind the transom door)? I had the same issue and it was a loose nut on the breaker. 

pcmpete

YYZRC said:

Did you check your connections at the charging breakers (at the DC panel behind the transom door)? I had the same issue and it was a loose nut on the breaker. 

Yes I checked them before.  Hopefully eliminating this corrosion section on the cable between alternator and isolator will help.  

This project is also forcing me to install my two victron fet isolators that I have been putting of for months.  

YYZRC

I recommend swapping alternators between the engines. Easy way to see if maybe you just have a weak alternator. I did and I replaced both.