I have twin Yanmar 3GM30 diesel
inboards on my cat. The previous owner had an external voltage regulator
fitted near the starter battery
on each engine
. The alternator
on one engine
has stopped charging
. The fuse in the excitator from the external voltage regulator
had blown and was replaced. The alternator
again but has stopped again. The fuse was checked but has not blown. I removed the alternator and had the marine
electrician check it and it is fine.
any ideas as to why the alternator is not charging?