How can you test the overheat alarm works?

Superjetjim

Petty Officer 1st Class
Joined
Jun 5, 2010
Messages
222
On a merc 150 1981?

Never heard a beep since I've owned her, not even on start up?
 

achris

More fish than mountain goat
Joined
May 19, 2004
Messages
27,468
Re: How can you test the overheat alarm works?

With the key ON, touch the wire that runs to the sensor to ground, horn should sound.....
 

Superjetjim

Petty Officer 1st Class
Joined
Jun 5, 2010
Messages
222
Re: How can you test the overheat alarm works?

Thanks, is the buzzer in the control box?
 

nbnewbie

Seaman
Joined
Oct 18, 2004
Messages
74
Re: How can you test the overheat alarm works?

exactly right to test buzzer external stream of hot water to test sensor
 
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