It's been several years now since I inflicted this on the poor thing, but somewhere out there is a Piper Archer II it once took me and a friend several tries to get started one cold, wintry day outside Washington, D.C. A lineguy came by, aimed a torpedo heater into the engine cooling inlets for a couple of minutes apiece, charged us a bunch of money and left. After a few more tries, we'd managed to frost the plugs, so we decamped to the FBO for hot coffee. Thirty or so minutes later, we tried again and finally got a start. Based on what I know now-I knew very little about engine or aircraft pre-heat-ing back then-none of what we did could have been good for that engine.
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