Since the frequency of the output is a function of the number of poles and the RPM of the generator shaft both legs have to be the same
! There must be something screwing with the way the Killowatt reads the Hz? Maybe the sine wave is distorted on that leg for some reason. I would get an induction motor or two, a 120V and a 220V and try them, hopefully with a way to check their running RPM; plug them in and see how they act, if the Hz is really off that much you should notice the motors acting strange
. What is that black thing in the middle of the oil fill plug, a level indicator? Also what is the valve and hose hooked into the intake for, starting fluid? Looks like a well made engine, is it noisy? I need the quietest diesel I can get and so far a 6/1 Listeroid is the least noisy diesel engine I have heard so far. Also I would be curious to know what brand and where the generator was made, and to see how it is excited and if it has brushes or not. And you might consider just using a battery charger run off the AC if the generator turns out to be OK? However it has been my experience that battery chargers don't always work quite right when run from generators, I'm not sure why. I think smallish generators have a little trouble running inductive loads because the inductance of the generator interacts with the load in ways that don't work out so well. Just my $.02 and worth at least half that
! Good luck with your toy Dave! Leland