Question: I just replaced my coach batteries with two 750 cold cranking amp. deep cycle batteries. My Onan 550 generator just clicks as if the batteries are low.
I checked the voltage at the generator and it is 13.6 volts DC. The prime side sounds like it is priming, but won’t turn over the generator. When I push the start button at the generator, it just clicks. Fuel gauge is a little more than 1/4 full. Any ideas?
Answer: We suspect that the clicking you hear is the solenoid engaging the flywheel. It sounds like the starter is the source of the problem, or perhaps the leads to the starter. It is difficult to diagnose these things remotely, but that’s our initial reaction.