Re: intermittent aural warning
We have 1998 5.0, alpha 1. intermittent engine alarm going off. It sounds in short beeps at any rpm, hot cold, random. Disconnected out drive oil res sensor connector, engine coolant temperature sensor, both oil pressure sending units and alarm still sounds. I another forum I read that the IAC WAS the problem, was not exactly the same year, honestly I have read so many post can't recall the details. BTW I have talked to the local Mercury service centers, basically they said DUH, so please don't patronize me. We have consulted regional Mercury rep, he said he would come back when boat could be run and plug his diagnostic computer into it, he said he could read codes the local service mechanic cannot. It seems to be a mystery what actually will set off the alarm, we have a service manual which is worthless, and frankly I don?t understand why the possible sources for alarm activation are not listed there, you would think that might be good information for an operator to have.
By the way we had just solved another problem with port engine, we had a tach that jumped around about 2800 and engine lost power, $600 in parts and labor($300 of which was from local Mercury mechanic) and many hours of swapping part between engine, again no ?professional mechanic? had a clue, we found a forum, it was the neutral cut out switch in the engine mounted throttle shift control, $25. Please keep in mind and pass on to anyone with erratic tach and low power.
