i just got a an old .15 from a buddy for free. its been sitting for a long time so both the engine itself and the carb are stuck. i took the back plate off and it isnt rusty or anything. question is, what the best way to free it up? could i pull the head off and fill the clyinder up with ARO and let it sit to see if that would free it? or is that a waste of time and oil? also, whats the best way to unstick the carb? Thanks guys