1994 Mariner 40 hp Magnum alarm problems amp slowing down

[jurenj]

"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.

Thanks,

jurenj"

[DJMERCMAN]

Jerry... It would be nice to know what colour wire you disconnected. Odds are the oil warning module is faulty as suggested but that WILL NOT reduce engine RPM. I also do not think you have a rev limiter on that motor so you may have a combination of problems...DJ

[charli]

Jerry.
It sounds as if it is going into safe mode. There is something telling the ECM the engine has a problem and to reduce the power. If that model has such a system. Even if it is a false alarm the cause needs to be found. It may have a temp sensor on it's way south.

[scubatop]

could it be low oil alarm?