I have just purchased a D315 CAT genset. After spending hours figuring. Out the fuel was about the color of raw sewage from a septc tank. I ended taking a temporary gas tank from a 5 gallon gas can. Now I have the motor going I need to figure out this genset. It has a belt driven exciter on top of the generator. Will I read 110 volts on the leads coming out from the gen? I am using a Fluke 87 multi-meter to check it for power. I am. Reading 3.5 volts at 1200 RPM and 5.5 volts AC at 1800. My question is on a gen of this vintage will I need to have a good load on the gen to get. an accurate reading from this vintage unit? I am pretty new to this. Generator hobby, so I plead ignorance here. I know this is a really old unit and may work differently than what I am used to working with. Thanx for thhelp guys. David.