My engine started knockin awhile ago and when i took it apart this bar was rubbing and knockin on the crank. i wiggled it and it fell out in my hand. Does this bar need to be there?
No it doesnt need to be there. That's your governer arm. It controlls how fast the engine can spin. It normally limits the RPM to around 3600 RPM. Just make sure you plug up that hole with a bolt or something or else it will puke oil.