I have a 1997 merc 50hp 4 stroke. The warning buzzer goes off after idling for about 30 seconds. Its pumping a perfect stream of water out of the discharge outlet so I know the impeller is pumping water. Then thought maybe low oil buzzer but checked that also and that is full ?? If I take off and go the buzzer shuts off, or if I turn the key off and start back up it will run for another 30 seconds or so before the buzzer goes off again. Its has been doing this for years. Do not want to try and troll because of this. Any help would be appreciated. Thanks
