Re: 1979 evinrude 55hp over heat alarm???
Yeah Sandollar, you should have an alarm horn in the control box. If ya' want to test it, the temp sensor is mounted at the head. Will have a tan wire coming from it with a rubber boot over it. Pull the boot back to expose the knife connector. Turn the key just to on and ground the knife connector to ground. The ararm buzzer should sound a steady tone as long as the connector is grounded. If ya' don't hear anything, better check the horn in the control box and replace if needed.<br /><br />Have to ask, after driving around all day and you can lay your fingers on the block and not feel any great amound of heat, think maybe your t-stat may need replaced? Do this, with the engine in the water and idling for a while, lay your fingers on the flat area on top of the block just forward of the head. You should be able to lay your fingers there for several seconds before having to remove them. If it stays like cold, might want to replace the t-stat. These engines like a little heat to run by.
