AllCarbDiet
Newbie
Hello boaters! I need some help diagnosing my no start issue with my Onan MDJE 2 cylinder diesel generator. I recently had it running flawlessly and then trouble hit. First the fuel shutoff solenoid that closes the injection pump armature wouldn't activate with voltage put to it. So, luckily I had a spare shutoff solenoid aboard and replaced it immediately. The generator started and ran as it should. Then I came back to the boat and the stop solenoid wasn't activating. I checked for voltage at the High Water Temp Switch and had none. I traced the wire back into the control box on top of the generator to a terminal on a buss bar. There are multiple connections after this point that I have questions with.
I have both the Onan Service and Training Manuals, but the wiring diagrams are a bit difficult to read. I'm wondering what kind of "over-current" protection the circuit offers. If maybe voltage from the control box to the HWTS may have grounded out and tripped a breaker or fuse. There are two circuit breakers on the generator control box that have power on both sides of contacts. I'm in desperate need of some help! I've sunk a ton of money into rebuilding the injection pump and various other things and don't want to condemn the generator if I can help it. Hopefully, I left enough information for someone to offer some insight. Any help would be greatly appreciated!
I have both the Onan Service and Training Manuals, but the wiring diagrams are a bit difficult to read. I'm wondering what kind of "over-current" protection the circuit offers. If maybe voltage from the control box to the HWTS may have grounded out and tripped a breaker or fuse. There are two circuit breakers on the generator control box that have power on both sides of contacts. I'm in desperate need of some help! I've sunk a ton of money into rebuilding the injection pump and various other things and don't want to condemn the generator if I can help it. Hopefully, I left enough information for someone to offer some insight. Any help would be greatly appreciated!