engine alarm???

[MIKETTURBO]

my experince with diodes are they are either good or bad.my problem is intermittent.Also it comes on sometimes as soon as I turn the key to ign.pos. (cold motor), & stays on when it starts. it'll stop on its own after a while,sometimes while underway it'll come on & off,& it's definitly not overheating.BTW it is an OCEANRUNNER.Its very annoying when you load up & are ready to head out for a nice day of fishing & that damn alarm goes off.