I wanted to do a good test of the low oil alarm on a 1991 Mercury XR4 150. I took the oil cap off and carefully and gently put about half of a toothpick exactly the right length between the cap and the float to force the float under the cap in the full down position. Then I taped it in place...
I'm concerned that somewhere in the overheat sensing system, either the sensor itself or the wiring, that something is not working. It's definitely not the horn itself because if I put 12 V on the horn it beeps. It's my understanding that if you short the tan wire connection at the bottom...
