Magneto..If the crank is turning there WILL be a spark..HOWEVER..The reliability of electronic ignitions is almost as good, and the engine can be started with one finger..AND weigh less...A Q52 with electronic ignition weighs about 4 lbs, compared to 5 with the magneto....A G26 weighs 2 1/2 lbs bare, 3 with ignition, muffler, and battery.....