The threads are worn and the vibration of the engine causes the oil cap to loosen. Replace the oil cap or try a little Teflon tape on the male thread as a temporary fix.
The common causes of tractor trailer accidents are drowsiness, speeding, and road rage (reckless driving). These are the common causes of all car accidents. However, when driving a tractor trailer, you should also consider the weight of the load you are carrying and how it is balanced on the trailer. Excess weight can cause tires to blow out, and can make stopping and starting difficult. If the load is improperly balanced, the trailer can tip over as well.
It sounds like you have air in your fuel system.
faulty liners/porous block or cracked head/head gasket
A loose connection in the wiring
A dirty spark plug can cause your lawn tractor engine to run at high RPM. A bad fuel filter can also cause this.
What causes it to rotate is the rifling in the barrel. What causes it to continue to rotate after it leaves the barrel is centrifugal force.
Gravity and the tension in the string.
improper engagement of bendix gear to ring gear was my problem
Inertia
because it does. only god will know for sure or your local lawn and garden shop mechanic.
Due to plate tectonics still moving, it causes the Earth's oceans and continents to continue moving.
The energy that causes moving objects to continue moving is called momentum.