i have a 1987 force 125 2cycl outboard that i bought at the beginning of the summer. I have replaced the head gasket,reed valves plugs,cleaned and rebuilt both carbs,and changed the primer pump. i put it in the water this weekend and it started great. it went right to wot and gave me a top speed of close to fifty mph. i had never seen this kind of power out of it before,however after maintaining that speed for about ten minutes it slowly lost power as if it was running out of gas and died. it started right back up but wouldnt let me push the throttle past about one third of the way,but it maintained that speed great. im thinking i have a ignition module heating up and breaking down.i would appreciate any help or advice with this problem