change power pack due to only getting fire on top left plug now all 4 firing good getting gas to all 4 but if i pull left two plug wires the eng.does not change but when i pull the two on left side (port) side eng. will quit running.<br />I have change water pump,power pack,plugs,clean carb.check jets ,timming is ok.125lbs com. on all 4 ,checked head gast. ok.but still running bad??????
