35hp '83 what is this wire

[james__12345]

What is this wire going into the back of the block?

 

[jbuote]

Not positive, (still new), but that sure looks like a temperature switch.
​Disconnected like that, I don't believe your hot horn would work and you won't get a warning if the engine overheats..

​My newbie guess.. LOL

 

[flyingscott]

yup temp sensor

 

[james__12345]

That's what i figured. I don't think the alarm is hooked up to anything anyway.

 

[boobie]

It would be a good idea to get that temp sender working incase of an over heat.

 

[james__12345]

Would the actual alarm unit for that be a part of the motor or something up at the console?

 

[jbuote]

It's a horn/buzzer in the remote control unit with the throttle and shifting..
​The tan wire from the temperature switch should go right into the wiring harness plug, and on to the control unit to the horn/buzzer...

 

[james__12345]

Ive never had a motor with an alarm (or a control box either for that matter, all tiller steers till now) so I didn't realize it was in the control box. The wire does go to the wiring harness plug. The wire is "connected" but the insulation is missing and the wire it self is corroded and in terrible shape, but there's enough left on either side of the damagenthat I can splice into and fix it.

After repairing the wire, is there any way to go about testing the alarm itself? Is there a particular voltage that could be fed into that wire or something to connect it to that would trigger the alarm? And is there a way to test the sensor similar to testing an old style ignition coil? I am fairly new to motors this "new". Most of my previous experience has been with late 60s and early 70s 18hp and under with very minimal electronics.

 

[jbuote]

The power is actually fed from the ACC of the keyswitch, to the horn/buzzer, then from horn/buzzer down the harness to the temp switch. When the temp is too high, the temp switch closes and grounds the circuit making the horn go off..

​Should just be a 12v horn, so a 12v supply should sound the horn/buzzer.