IBNFSHN wrote:
Simplest check is to check the battery voltage with the motor off and then
check it while running. It should be higher running.

The simplest test is to turn on a light using the battery and start
her up. If the lights get brighter after it starts, you're
charging, some.

If you have a good voltmeter, 14 volts should be about right, maybe
a little lower if it's hard to start.

Gotta hydrometer?

Terry K