Annoying Buzzer

phatwake360

Cadet
Joined
Oct 26, 2009
Messages
21
The over heat alarm keeps going off on my 1993 90hp merc

the alarm comes on sometimes when i first start up then stays on, sometimes it goes on faintly. sometimes if i play with the ignition key it stops the buzzer sometimes it does. if i switch off then on again it sometimes clears it.

now im assuming it could be down to the ignition switch but any other thoughts on what it could be and how do i test it
 
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