I took apart the timing gear to show you guys how the oil pressure lubrication on these Chinese engines works. I myself was surprised by the quantity of oil flow through the crankshaft. Mind, that the oil pump spins at the rated speed of the engine, which is 2200 RPM, however my drill is not rotating more than 500 RPM. Thus the oil flow through the bearings is around 4x greater! This is one of the reasons these little engines last!

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