I don't know..., try changing the fuel/air mixture jets on the carburetor?? clean the carburetor? change the spark plug? i don't know man..
Some, or all of the fuel circulates through a cooling jacket around the rocket engine before it is burnt and this cools the rocket's engines. But there might be more to it than that.
Pumice rock.
Yes. Once it cools it'll turn into water again.
Yeah, definitely. Just wait.
condensation
if it is a carbureted engine sounds to me like vapor lock. Used to happen quite a bit on older Fords when fuel filter was too close to a hot area and it allowed fuel to vaporize. Then when it got cool the truck would start.
Air doesn't expand when it cools it contracts. any easy way to prove this point is to blow up a balloon put it in the fridge and leave it there for a while it will become smaller take it out of the fridge and it will get bigger again. Air expands as it heats and contracts as it cools.
Well since it is buoyant, it rises until it cools enough to begin falling again.
it works like air and a radiator the heated air rises and cools then falls and the process is repeated again and again
Ignition Control Module are common to cause this. Loss of spark with heat from the engine, when it cools off, starts up.
In the convection zone, hot plasma rises, cools as it nears the surface, and falls to be heated and rise again.
In the convection zone, hot plasma rises, cools as it nears the surface, and falls to be heated and rise again.