Hai-Lee
Old and Bold RC PILOT
To work on my models I do not need to remove anything but rather I turn the Tx off and use the failsafe to kill the motor permanently, (well until the Tx is re-energized). When doing setups where I need the Tx turned on I disconnect a single lead to the motor so that it cannot be driven and yet it can still supply the beeps generated by the ESC.That's fine for the really small ones...I'm talking 049s and such...because they're too weak to do any damage if they bite. And that's ok to do with the super big ones, shockingly enough, because they idle so slowly that you'll have your hand out of the prop disc before the thing picks up enough speed to bite you.
Still, if you're hand-starting an engine, use a chicken stick(My poor-man's chicken stick is just a screwdriver held by the shank) or put on a welding glove. If you're wearing the glove and it bites you, it's gonna hurt like hell, but it won't do any actual damage.
....personally I just use an electric starter and be done with it. Just a kiss and the engine's running, my fingers are never in the prop, all's good in the world.
I find myself more skeezed out working on electrics tbh. I shouldn't have to remove the prop every time I want to check/adjust the servos but that's the safe way to do it with an electric. A fuel plane can't just randomly bite you during a servo check/adjust because the Tx got bumped. There's only one time it can bite you and it will never be a surprise when it does that. Not with electric. Electric is just as inert appearing when it's live and ready to fly as when there's no battery installed at all.
I still have all my fingers