ORIGINAL: TRITINY
If you run an OS too lean or under prop it you'd loose the crome on the cylinder which will cost half the cost of the engine to replace.If you do the same with MVVS you'd loose the idle needle would'nt cost much
Trinity,
On the OS you will lose the
nickel coating. There is no chromium in newer, ring-less OS engines.
MVVS is true chromium plated. Most often the engine will overheat and cut out, if run too lean, but after cooling down, it will live to fly another day.