Iv had a Super MD for about 4 years now went though the engine etc. They have a tendency to crack heads when they are shut down hot and not allowed to cool and equealize after they have been worked hard. If i for instance am using it for plowing, or bush hogging, i will park it in the shade and leave it just above an idle for ten or so mins. Make sure you leave it in the diesel postion when you have it off to allow the sarting valves to cool on their seats and not warp. As far as the sudden rev up, it shouldnt really be doing that, the manual says to have the speed control lever 'throttle' to about the 1/3 to 1/2 way position when switching to diesel. However mine will swithch lower then that. I think the main thing you have to worry about with the reving at a start would be to blow a head gasket, however this is true with all engines in general at a cold start. I personal dont see the need for a block heater that is why they start on gas, and where popular in cold climate areas where other diesels at the time would have had a much harder time starting.
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Today's Featured Article - Tuning-Up Your Tractor: Plugs & Compression Testing - by Curtis Von Fange. The engine seems to run rough. In the exhaust you can hear an occasion 'poofing' sound like somethings not firing on all cylinders. Under loaded conditions the tractor seems to lack power and it belches black smoke out of the exhaust. For some reason it just doesn't want to start up without cranking and cranking the starter. All these conditions can be signals that your unit is in need of a tune up. Ok, so what is involved in a tune up? You say, swap plugs and file the points....now tha
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