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 started
charging 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?