Could be dirty fuel injectors, or perhaps water or other contamination in the gasoline.
I suppose it could also be that you have run out of lubricating oil, but in that case, the engine would weld itself together, and it would never run, again.
Valve burning can be caused by factors such as overheating due to poor engine cooling, inadequate lubrication, incorrect valve clearance, poor fuel quality leading to pre-ignition, or prolonged high-speed driving causing excessive heat buildup. Regular maintenance and proper tuning can help prevent valve burning.
The speed of a 212cc engine depends on various factors such as the vehicle it is powering, gearing, weight, and aerodynamics. However, in general, a 212cc engine can reach speeds of around 40-50 mph in a go-kart or similar small vehicle.
Losing your boat
The top speed of a 140cc engine can vary depending on different factors such as the type of vehicle it is installed in, gearing, and aerodynamics. On average, a 140cc engine can reach speeds of around 50-60 mph.
In an automotive engine, the wrist pin connects the piston to the connecting rod. It allows the piston to move up and down while the connecting rod transfers this motion to the crankshaft. This connection is crucial for proper engine operation and performance.
you don't mention if it's the engine or trans....my thoughts are trans...most likely a lock up solonoid...t
engine rubber mounts or timin out
If your engine has a timing belt and is an interference engine you can bend valves and cause a bunch of damage. If it is not an interference engine you can simply replace the belt and or pulleys and all should be good. Please note that if you were driving at a high rpm when belt jumped you could still have damaged valves even if its not an interference engine
It is very possible that the driver's side engine mount is broken.
Why engine stalls on 1993 Chrysler Intrepid while driving and sometimes at stops?
Try disconnecting the fuel line by the fuel filter and crank the engine. You should get some fuel spitting out of the hose.
The engine...
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your foot
If you mean why the difference in RPMs between idling and driving, the difference is due to the engine load; At idle, the engine isn't really doing much other than staying running, but under load (driving) the engine has to put its power out to the drivetrain, hence the symptomatic loss of engine speed (RPMs).
engine stalls sometimes driving
That depends on the engine and what belt (timing or accessory).