Small Engine Troubleshooting Problems? Ask a Mechanic Now.
What does the generator output read when engine is running? It should put out at least 15 volts, if generator is working, check the battery connection from the regulator to the positive battery connection, usually on the starter solenoid positive terminal. Wire may be broken .?? Was generator polarized after installation?
Check the green and the red and white. Have to find more than battery voltage! Both go to the regulator .
Test each wire from wire to ground. Black to ground, red to the wires, one at a time.
You are testing with engine running? With the starter side working, it seems odd that the generator side has zero output.
OK> let's see what he comes up with.