-
No
gasoline in tank
-
Gasoline
shut off valve jarred closed
-
Air
lock in gasoline pipe or tank
-
Clogged
gasoline supply pipe
-
Clogged
spray nozzle (dirt or water)
-
Battery wire loose at either terminal
-
Broken
primary wire
-
Broken timer spring (rare)
-
Ignition
short circuited by ground in wire
-
Particles of carbon or oil between spark plug points
-
Insufficient lubrication
-
Pistons seized on account of defective oiling
-
Inlet valve stuck open
-
Bent or broken camshaft or crankshaft (rare)
-
Seized main bearings (rare)
-
Flywheel wedge by foreign matter in engine base (rare)