Pull all the plugs. Shoot a mixture of oil, transmission fluid, and diesel in thirds down the spark plug holes and intake. Crank it over like 1 minute. Then put in all the plugs (no plug wires or disable ignition) and crank it over for 15 seconds. Tape over the carburetor hole with duct tape and put breather back on.
Or just use what ever oil wd40 by the quart. Key is to get it sloshed all round lube style with the plugs out so you dont hydro lock. Then after all excess has pumped out. Put plugs in to atomize and suspend the oil so it will coat the valve stems and seats.
My theory on it there..:)