markrsimon
Active Member
If its not overspeed (high freq), then its a safety, a bad board, or perhaps engine ignition related. You could disconnect all safety (pull #85 from the engine controller board, which is Terminal 12), or disconnect one at a time. Worst case, put a voltmeter on #85 and record video (phone/GoPro) and see if it grounds out just before the engine dies.. an analog voltmeter would work best to catch any momentary grounding, or disable Auto ranging on the digital meter.
How is the engine oil level, and filter?
If your confident that you dont need the safety sensors, pull #85. If it still dies, you can ‘hotwire’ the engine, by feeding it a constant 12v to the ignition components (terminals 9, 10, and 11 on engine controller, wire #14) - which basically takes the engine controller out of the mix, also bypasses the overspeed safety (which you’ve check anyway). To hotwire, pull 9, 10, 11 off the board and find a way to provide (and disconnect) power to them. These feed the fuel pump, fuel solenoid, choke module, and engine ignition. To start the gen, apply power to 9, 10, and 11 and then press Start switch. Engine will continue to run until you manually remove power from 9, 10, and 11. Engine controller is only used to power the starter motor - no safety, no overspeed, no shutdown. Suggest doing this without load. If genset still dies - its an engine thing. If it runs and runs, then its an engine controller thing.
My problem was the transistor bolt came loose, transistor overheated and became damaged, and was only providing ~6v on wire #14 (ignition) which wasnt enough to run. Thus my experience with hot wiring it. I ended up buying a brand new board (newer version) and have been good since.
Safety Sensors:
High Coolant Temp, greater than 240F
Low Oil Pressure, lower than 15psi
High Exhaust Temp, higher than 246-266F
Ignition related components-
Fuel pump (you just replaced)
Fuel solenoid on bottom of carb
Engine ignition items (cap/rotor/etc)
Good luck, and let us know what you find out next.
How is the engine oil level, and filter?
If your confident that you dont need the safety sensors, pull #85. If it still dies, you can ‘hotwire’ the engine, by feeding it a constant 12v to the ignition components (terminals 9, 10, and 11 on engine controller, wire #14) - which basically takes the engine controller out of the mix, also bypasses the overspeed safety (which you’ve check anyway). To hotwire, pull 9, 10, 11 off the board and find a way to provide (and disconnect) power to them. These feed the fuel pump, fuel solenoid, choke module, and engine ignition. To start the gen, apply power to 9, 10, and 11 and then press Start switch. Engine will continue to run until you manually remove power from 9, 10, and 11. Engine controller is only used to power the starter motor - no safety, no overspeed, no shutdown. Suggest doing this without load. If genset still dies - its an engine thing. If it runs and runs, then its an engine controller thing.
My problem was the transistor bolt came loose, transistor overheated and became damaged, and was only providing ~6v on wire #14 (ignition) which wasnt enough to run. Thus my experience with hot wiring it. I ended up buying a brand new board (newer version) and have been good since.
Safety Sensors:
High Coolant Temp, greater than 240F
Low Oil Pressure, lower than 15psi
High Exhaust Temp, higher than 246-266F
Ignition related components-
Fuel pump (you just replaced)
Fuel solenoid on bottom of carb
Engine ignition items (cap/rotor/etc)
Good luck, and let us know what you find out next.
