If it has F400 cast into the block then it is a 4-cylinder flathead Continental engine. Could be a 124, 140, or a 162 cubic inch version, they are all the same engine with different cylinder bores, everything else is interchangeable except the pistons and rings. If it has hinged sidecovers and a cast iron front tub surrounding the engine, it is a MH 101 or 102 Junior. If it has a cast iron tub and no hinged sidepanels it is likely a MH 30. If it has hinged sidepanels and a channel iron front frame, it is a MH 81 or 82 or 20 or 22. If it has a channel iron front frame and no hinged sidepanels, it could be a MH Mustang and maybe one other model (same tractor basically), I can't remember the model name. Serial number is in the upper surface of the machined differential case between the shifting platform and the cover for the rear differential gears. Look to the left side on that upper surface, it'll be covered in paint and pigeon poop so get a wire brush.
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Today's Featured Article - Listening to Your Tractor - by Curtis Von Fange. Years ago there was a TV show about a talking car. Unless you are from another planet, physically or otherwise, I don’t think our internal combustion buddies will talk and tell us their problems. But, on the other hand, there is a secret language that our mechanical companions readily do speak. It is an interesting form of communication that involves all the senses of the listener. In this series we are going to investigate and learn the basic rudimentary skills of understanding this lingo.
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