ive always gone to biggart marine in plaistow and they have always treated me fairly. they put a new 115 merc on my boat back in 92 for almost 2 grand less than any other quote i had, was 5600 installed back then. the only alarm i know of on my merc is the oil injection alarm for low oil, am betting it has something to do with that. if you go ,call and get directions, it sits back of the road and you really have to look for it