I assume with posting this on page 7, not many will see it, but here's the real story about engine heaters. I have used them my whole life. They are no more likely to burn down your barn than your radio is. They warm the engine and the oil so it will circulate much easier, sooner, and more completely. I just shake my head when I see people brag about how tough their machine is. "I start mine at -10, -20!" Just because you can do something, doesn't mean you should. The money you save on electricity will be spent a hundred times over on premature overhauls on your engine. That "clakety clack", as one poster said, is the sound of your engine running without lubrication to the bearings. That molasses in the pan can't get to the crank right away. Use your heater for 3-4 hours, start your engine while doing it a huge favor, and then use it and put it away. Use the heater again before you start it cold. Using the engine heater is smart, end of story.