"My 1994 Mariner 40 magnum was running at full throttle and suddenly slowed down to just above idle and the alarm came on. The alarm was a constant alarm. After running at this spped it suddenly accelerated and ran fine for a half mile or so, but the alarm stayed on. The next time I turned on the key the alarm came on and stayed on. The only way I can get the alarm off is to disdconnect one of the wires that fits on the side of the engine. It still slows down though. I am getting plent of water through the teltale and it is not to hot to keep my hand under. One repair shop suggested it might need a new alarm module. Would a bad module make the engine slow down like that? Any help would be greatly appreciated.