My son installed a rebuilt engine on his blaster. It ran fine for a few hours, then suddenly stopped. There was oil in the crankcase. The fuel was mixed correctly. Something was jammed up. It wouldn't turn over, couldn't even move the kick start.
I thought at first that something had been sucked into the exhaust since the muffler had fallen off for a while and my son hadn't really installed it again completely properly.
We took off the top end. The bottom end seemed OK. Rod moved up and down freely. Kick start moved freely. We put the top end back on again. It also seemed undamaged. We also installed the muffler properly this time. The engine started again, and ran about 30 seconds, and then abruptly stopped. It was as though the piston suddenly hit something. It was at the bottom of the stroke. Completely jammed.
Can anyone give me an idea what could be jamming in there?
I thought at first that something had been sucked into the exhaust since the muffler had fallen off for a while and my son hadn't really installed it again completely properly.
We took off the top end. The bottom end seemed OK. Rod moved up and down freely. Kick start moved freely. We put the top end back on again. It also seemed undamaged. We also installed the muffler properly this time. The engine started again, and ran about 30 seconds, and then abruptly stopped. It was as though the piston suddenly hit something. It was at the bottom of the stroke. Completely jammed.
Can anyone give me an idea what could be jamming in there?
