Generac Q-55G Not putting out power Sept 21, 2015 10:25:09 GMT -5
Post by JerryP on Sept 21, 2015 10:25:09 GMT -5
Now watch you DMM while you crank the engine. Depending on how fast the motor starts will determine how much voltage you will read but it should be at least 8 to 12 volts. Once it starts and is no longer cranking it will drop to zero volts. See what you get.
I did the test you posted above.
- Connect that adapter back on to the voltage regulator but leave the alligator wire still connected.
- But now connect the other end of the test wire to the positive lead of your DMM.
- Connect the negative DMM to a good ground on the motor, probably where the ground cable from the battery connects to.
- Set your DMM to DC volts.
- Now watch you DMM while you crank the engine.
- Depending on how fast the motor starts will determine how much voltage you will read but it should be at least 8 to 12 volts.
- Once it starts and is no longer cranking it will drop to zero volts. See what you get.
I measured 2.8-3.0 volts on the DMM doing that test. Of course, my generator did not start (that is the problem), so that was during cranking.
Is there a way I can excite the field winding and voltage regular with 12 volts (which is what I did when I managed to start the generator engine) and leave it that way without damaging anything which is apparently not already bad?
I can connect a relay up so the coil connects to the starter side of the starter soleniod and ground, then connect the NO switch to the battery side of the starter solenoid and the switch 'common' to the terminals where those two wires are, this will put 12-13 volts to those wires only while cranking, then drop the voltage off when the generator starts and the starter solenoid is released.
I'm not sure that will address the problem or not - I suspect the 'Engine Controller' circuit board is bad and I have not found a source for one as yet.