GeorgeKelp:...I know they do but I says it only works on the 21bb and the force .21 and .25. Is the pullstart on the Force engines the same as on the Hyper 21 8 port?If so I will definately get the roto start.I hate tugging on these .21 engines it killer on the hands.

Whiskyvr4....I wasn't thinking when I bought the pullstart version of my engine.I should've bought the non-pullstart version and just got a box but it's to late now i already broke in the engine so they won't take it back.I just wanted to know if it was possible to change it for as little money as possible but it looks like I'll just keep it this way and when the engine dies i'll buy one without a PS.Thanks for all the info Guys it's been a big help.