overheat horn

[werdnlr]

I have read through the archives to find out how to test my overheat horn. Also I have looked through my manuals electrical breakdown. I am color blind and finding the TAN wire is impossible. My manual doesn't show a horn of any kind or a tan wire. Can someone direct me if I have one or not and if not how can I install one

Thanks

1985 50hp Rude

 

[shearpin]

Re: overheat horn

look on the cylinder head for a wire going into the head shoulb about a 1/2 hole with a rubber stoper. seems like most are mounted on the right hand side. It should be the only wire going into the back of the head. the wire will also had a rubber covering, 2 inches long, with 2 rubber tabs at either end. pull the rubber tab to expose the folding connection. with key on ground the connection to the block. hore should sound.

 

[werdnlr]

Re: overheat horn

K, found it and tested it. No sound. How do I fix this issue?

 

[HighTrim]

Re: overheat horn

Heat switches, installed in each cylinder head, are in series with a "HOT" warning horn in the remote control box. Should an irregularity develop in the cooling system and cause abnormal water jacket temperatures, the switches close the warning circuit. A switch may be checked by submerging it in hot oil Using a test light to check the contacts and a thermometer to check oil temp., the contacts should close at a temp of 211 F + or - 6 and open at 175 deg F plus or minus 7.

To remove switches for testing, pull back insulating sleeves and open knife terminal connections. Remove cylinder head covers and switches. On installation, clean gasket surfaces thoroughly. Apply gasket sealing compound lightly to both gasket surfaces. Also apply the same sealing compound to top surface of heat switch grommet and again after cover has been installed. Install cylinder head cover using a new gasket. Reconnect heat switch leads and slide insulating sleeves over connections.

 

[angus63]

Re: overheat horn

Might wanna put 12VDC to the horn and check it out also.

 

[iwombat]

Re: overheat horn

The temp switches ground out when closed. So, you'd want to ground out the brown wire to the block to test out the horn. You can do that by unhooking them at the connector near the head.