can you use a starter box on an engine with a pull start? if no, why not?

Well its not reccomended but when I go to the races w/ a friend I use his starter box. Its so much easier that way.

Yes you can, one of my GS .21 B01 has a pullstart and it's handy to have both. starter box in the pits and a pullstart anywhere else (backyard bashing, in the middle of the track, etc.). What many argue is the downside of having a pullstarter is that it causes some drag in the crank which looses horsepower. I personally don't really agree to most motors except for certain motors that a one way bearings would affect the crank designed for speed and racing such as the Hyper 21 8P and race.

Starter boxes will save your hand!

Especially if you have a competition engine.. Good luck pulling on that!

Yes you can start most cars with a starter box save the MTS with the dual parallel frame design. Or heck.. anything with the flywheel not sticking out.

So yeah you can! But if your engine is warm and ready to go.. the PS will be easier than to walk to the starter box.