Our family had a Johnny Pop. We needed two wrenches to work on it. A big one
and a little one. Started on gasoline and ran on kerosene. Cranked by rotating the
flywheel. It had two cylinders, and may still be running somewhere. Wish I
had it just for the fun of it.
I was too little to start it, so my Dad would start it on Friday afternoon and I would
run it all weekend, 24/7. I got up in the middle of the night and put fuel in it while
it idled all night. You had to open a couple of stop cocks to relieve the pressure in the cylinders when you started it, then close them to run it. When it started, the dogs would
hide under the porch, the chickens would take off somewhere, the cats dematerialized, and the horses panicked. The house rumbled with the sheer noise, and
birds fell from the air. it was glorious !
We kept a coffee can on the vertical exhaust pipe, and if we forgot to remove it
when we started the tractor, it would sail thirty feet in the air.
My L3901 is a wonderful little beast, and I wouldn't take for it, but it'll never match the sheer drama of the old Poppin' Johnny ! And ... it will never orbit a coffee can.