I found the following in some document that I had saved on my computer:
Electric Output - The engines are very sensitive to ground. If the grounds are not
perfect, the rectifier will not charge. Check out the grounding yourself with a VOM.
You should have continuity every place. Especially check the wire that connects the
upper unit to the lower unit and the grounds in the motor casing.
The ignition system is AC with a rectifier not an alternator. There is no regulator. The
rectifier will put out as much as 13 amps at 13.5 volts. You can tell if the rectifier is
working by measuring the voltage at the cables. Make sure all other charge sources are
shut. It should read 13.5 volts with the engine running above quarter throttle.
Any comments on this? I have the shop manual for the engines but the parts that they recommend testing (lighting coil?) are nearly inaccessible on the port engine.
Any help is appreciated!!!