just bought a 1976 115 6 cyl it has issues starting but will, it idles poorly I have to keep playing with the choke to keep it going. but it will eventually idle on its own. I also put it in gear and i have to repeat choke procedure until it gets up to speed then all works well. I replaced spark plugs and ordered a repair manual from here. I will check compression tonight anything else I should check before man. gets here?