87Nassaublue
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- Sharpsburg, Ga
OK guys, I need some advanced advice.
I've recently acquired a MEP-016B Onan generator. I've repaired a long list of fuel system issues already. Now, I can get generator to start and run by holding the fuel shut off solenoid as if it were energized. I tried jumping in 24 volts to pull the solenoid in but it didn't pull in and I drew excessive current with the jumper.
I realized the low fuel level switch was bad and wouldn't complete the low fuel circuit. I shorted pins D and E at the switch and tried to start it and the DC circuit breaker tripped immediately.
After more head scratching and study of the schematic, I see that one side of the switch goes to A1-TB2 pin 9 which is ground. The other side goes to the control circuit board, A3-TB2 Pin 1.
Logic would dictate the wiring harness is not shorted to ground since one side of the circuit is ground and unless the switch is closed or bypassed the circuit breaker does not trip.
So, it would seem the problem is either on the circuit board or related to it.
Have any of you guys experienced a similar problem?
Do any of you have a schematic of this A3 board? It doesn't look very complicated. You'd think there'd be a schematic of it somewhere.
I can see now why this one was DMRO'd. My other E model one only took an hour or two to get it going perfectly. Every time I repair one thing on this B model , it just leads another issue. The engine runs great but good grief what a PITA. I haven't been able to even test the generator portion yet.
I've recently acquired a MEP-016B Onan generator. I've repaired a long list of fuel system issues already. Now, I can get generator to start and run by holding the fuel shut off solenoid as if it were energized. I tried jumping in 24 volts to pull the solenoid in but it didn't pull in and I drew excessive current with the jumper.
I realized the low fuel level switch was bad and wouldn't complete the low fuel circuit. I shorted pins D and E at the switch and tried to start it and the DC circuit breaker tripped immediately.
After more head scratching and study of the schematic, I see that one side of the switch goes to A1-TB2 pin 9 which is ground. The other side goes to the control circuit board, A3-TB2 Pin 1.
Logic would dictate the wiring harness is not shorted to ground since one side of the circuit is ground and unless the switch is closed or bypassed the circuit breaker does not trip.
So, it would seem the problem is either on the circuit board or related to it.
Have any of you guys experienced a similar problem?
Do any of you have a schematic of this A3 board? It doesn't look very complicated. You'd think there'd be a schematic of it somewhere.
I can see now why this one was DMRO'd. My other E model one only took an hour or two to get it going perfectly. Every time I repair one thing on this B model , it just leads another issue. The engine runs great but good grief what a PITA. I haven't been able to even test the generator portion yet.