I have a similar problem with a kawasaki mower. it was running fine, emptied the catcher and wouldn't restart. Found plug fouled, no start with a new plug. removed coil, and with an ohm meter tested continuity of poles to each other, inconclusive. found a good coil from a different B&S mower and compared readings. Kawasaki had continuity with plug lead and center pole on pick-up, B&S did not. I assume the center pole is grounding out the plug lead, so I will replace the coil and see.
.010 to .012"
what is the valve setting on a 25 hp kawasaki lawn mower engine
kawasaki kx80 model jkakxws19na002712 engien number kx080se003438
the little nozzle on side of engine that has a knob on it
Kawasaki 15 HP Ariens Lawn Mower takes 1.2 Litres of oil and maybe a little more when you change the oil filter
rcpw.com
2000+ hours if properly maintained!
It is usually both on the blower shroud and stamped into the valve cover.
Try spraying start gas into the air cleaner.
Not on a push mower that has no electric start. On a riding mower, yes there is an ignition key.
Kawasaki was noted for valve clearance, check that first
Generally the ignition switch activates headlights on a riding mower and the start position only send current to the starter solenoid. If you turn the key and the engine cranks over than the lack of spark is going to be something else. If it is a riding mower you will have several safety switches to prevent start up under unsafe conditions.