4. Don't never, ever try to turn over an engine that is hydro-locked because of fluid (water, gas, oil) in the cylinder. Good way to bend a connecting rod.
Water in the cylinder: Checked the crankcase? Front cover (alternator, bean can)? Transmission oil? Driveshaft oil? Rear end oil?
'73 R60/5 Toaster
Luddite. Not just a philosophy, a way of life...