Gennys get their speed adjusted with a HZ meter...many multimeters have a setting for it. In the USA they get set to 60HZ...other parts of the world use 50HZ. The voltage regulator should hold somewhere 115-125V at 60HZ EDIT: on a small single cylinder powered genny like that you could also set the RPM to 3600 with a tach...that will be 60HZ on the genny.
I'll look to see if I have a HZ reading on my meter. I didn't check that, Thanks! I know when I used to regulate the generators on shipboard, we used to dial in the HZ. Thank you for that reminder, I had totally forgot it.
Today my friend from the CG base who is the high voltage electrician came by with a multi meter that looked like the instrument panel to the space shuttle and we ran the generator. On initial start up, it finally settled in at 59.36 HZ so we kicked the RPM up a tiny bit so he got it at 60.21 +- a few ths. We loaded it up with a heat gun, and the halogen lamps and it stayed between 59.80's and 60.09+- He said he was satisfied and it will fluctuate a little but for "most stuff", Lights, tools, it'll be fine. I think it's in the game now