spring starters are only workable for engines that have a shaft sticking out of the rear of the crankcase like a chainsaw engine or certain weedeater type engines with rear pull start. B & B will get you a spring starter setup for your engine for not too much http://www.bennettbuilt.com/page4.htm if the tail shaft of the engine isn't the right size you can turn it down in a lathe or have it turned down by someone with a lathe... other than that, all you have to do is find somewhere on the rear of the engine to support the spring and make sure you put the bearing on in the right direction, it's not a very complicated setup...