There is a spec for the RPM of both the gen head and the D. Cna yo tell me what those speeds are? No rush....I'll be up for a couple of hours
Kidding! No rush but give a holler when you find out.
If that is the engine think it is it is a mech and will run on engine drain oil or WVO or a 50 50 mix with gasoline. The catch is that you have to pull the head and decarbon every so many hundred hours////unless you heat the oil to 180 degrees and then no need to clean. Visit the "blenders" in yahoo groups. Odd bisquits but still....