Why is the gas engine more unreliable than a steam engine?
Because it depends upon so many delicate devices and adjustments for its operation, any one of which can make trouble. These are such devices as carburetors, magnetos or generators, and distributors, cam shafts, timing gears, poppet valves, spark plugs and valve springs, etc. Not only are these devices themselves delicate, but the processes or functions they perform are even more so. There are no correspondingly delicate processes or devices on the Stanley car.