All aircraft with `starting mags` need special attention,as one must only crank them `after` the prop-swingers have cleared the prop arc,as you are sending a continuous stream of sparks,and if you start cranking too early,the engine,especially rotary or radial may well run backwards. Once the engine picks-up,one can then put the normal mag(s)on. It has also been known that the engine,after priming,can fire up by just using the starting mag. It should not be confused with the `impulse `mag.
Bottom-line,= treat all mags as always live....and pilots must keep hands outside the cockpit until starting...