Re: [Amel Yacht Owners] Onan Generator
Craig & Katherine Briggs SN 68 Sangaris Tropic Isle Harbor, FL
Hi Danny,toggle quoted messageShow quoted text
Actually it's a little different than your engine alternator. That does indeed have a direct 12v excitation wire that energizes when you turn the key on. On the Onan (or other gensets), the AC generation is dependent on having a residual magnetism begin the excitation process. There isn't a separate 12v battery circuit. The residual magnetism can be lost with a long period of non-use, a shock load on the system that kills the engine, which is likely Heinz's case, our faulty brushes.
Cheers, Craig SN68
---In amelyachtowners@..., <sailorman.ds@...> wrote :
It is the same way as your engine mounted alternators have to be excited. Properly wired it happens when you turn the start key on. I guess it should work the same with the gen set. With your alternator if the exciting circuit is faulty the excitation can occur by reving your engine. This result tells you the alternator is OK and it is the excitation circuit where the fault lies. So perhaps your problem is in the excitation circuit
SM 299 Ocean Pearl