Large 4-stroke engines like to be started w/ a back-flip via chicken stick. In fact, when these large 4-stroke engine is a little over-primed, it is hard to start it w/ electric starter; in fact, it may kick back and throw off the starter, and starter drive cone will damage the spinner. On other hand, when the engine is hot, electric starter is the only thing that will start the engine. So I have both the stick and starter. The starter is most useful to me at the end of flying day when I have to run the fuel dry in the engine: this is when the electric starter is advantageous.

Also, I spend a lot of money on these large aluminum spinners. I hate to mess them up unnecesarrily w/ electric starter unless I really have to.

So, depending on what engine you have, use the stick or starter appropriately. But never turn a prop w/ bare finger when the glow battery is on. The kick-back is just not worth it.