The plain bearings in normal internal combustion engine do not rely on oil pressure to float the insert over the journal. They rely on a continuopus supply of oil to refresh that squeezed out. If the pressure is sufficient to get oil to the bearings, it will be fine. Exceptions are bearings and pistons cooled by the oil. The reduced flow of near no pressure can overheat journals that are subject to high temp. Jet orifices directed to piston skirts that do not supply sufficient volume far enough will cause burned pistons and siezed engines. Engines with hydraulic Lifters or other hydraulic Oil pressure related adjustment systems (including cam timing) will not be happy. Old simple tractors live with little pressure for a long long time. (not recommended) Jim
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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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