Ok so i've been tearing apart the engine to clean it all out to make sure no water has gotten in there at all. So i took it apart and first thing i see is theis little pin,( looking in from the pull start side hole) looks like it goes in the hole that connects the piston to the crankshaft and in that hole there is a little spring.

My question is...How the heck do they go back together? I put the spring in and then the pin but the spring just pushes the little pin back out? Whats the deal?