Hydrolock?  That's a new one to me.  What is it and why does it prevent
cranking?
 Dave
Hydra lock or hydraulic lock is when you have fluid in the cylinders such
as gas. When cranking over the fluid cannot be compressed like air so the
pistons actually lock or cannot move. Fastest remedy pull plugs and hand
turn the motor to pump gas out. Do not turn ignition key over to crank
the motor. Aloha, Ed