We owned two, my brother and sister each had one. Lots of power! But too light up front, we kept two bags of cement up there.
My brother and I blew an engine in Death Valley: we had an oil rag in the engine compartment that got sucked into the fan.
We rebuilt the engine but had low compression in one cylinder. My brother and I hooked up an air compressor to the spark plug hole and sure enough we heard a leak from the bottom of the piston.
So my brother reaches into the crankcase and puts his hand under the leaking cylinder just as the compressed air turns the engine over and he gets his hand caught by the crank. And the air pressure kept the pressure on his hand
It was pretty scary for two teens! He ended getting stitches, no bones broken
And yes, those engines ALWAYS leaked oil.