Can anybody tell me the thread & pitch on the outer circumference of the Mercury flywheel puller,is it BA,whitworth,????????????. My 50hp 4 cylinder Merc just wont start i think its a 1985 Belgium made.I've by-passed the kill switch,dis-connected the regulator i get no spark ?? I want to check the stator and (as you Americans say the trigger)there aren't any voltages on the right side of the power pack. <br /><br />your help is appreciated<br /><br />i can't let a machine win 