You need to get a f-O4 manual by I&T.They have a fairly detailed procedure for a lot of adjustments ect. As far as the overheating,you should check for a thrmostat.If there is not one,put one in.It is in the upper rad.hose,just pull it off& see remember to install it w/spring toward engine.Also probably needs idle mix. adjusted by screwing allthe way in, then back out 1/2 turn. Adjust slowly for fastest idle,keeping in mind that in is rich,out for lean then adj. idle speed (nearest engine).-----lha