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2 cycle oil in 4 cycle engine
Lent pressure washer (B&S 4 cycle, 6hp "Quantum" engine) to co-worker.
Co-worker checked oil, saw it was low, and added *2-cycle* oil. Ran unit for another 5-10 hours. Pressure washer came back a mess. Oil residue all over the place. Saw seepage from what looked to be bottom horizontal seam of engine block, and residue all over front of unit, and even in air filter (?). Haven't ran the engine yet. Drained oil last night (after a fight with the bottom plastic under-cover to access the bottom drain plug). Will change spark plug and air filter today as well. Is there additional maintenance I need to do (a gas additive?)? Is the engine going to die prematurely or something? Thx, Oliver |
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"Harry K" wrote:
2-cycle oil is meant to be blended with gas (in most cases) and is not designed to be poured into a crankcase. True. My guess is that some serious damage has been done to the motor. Maybe, maybe not. The biggest problem is that 4 cycle oil has anti foaming agents and suspension agents in it, whereas 2 cycle has very little additives so that it will burn cleaner. The lack of anti foaming agents is probably what caused the mess. The damage done will depend on how much 2 cycle oil was added and how long it was run. Drain the motor, clean it up, replace the oil with the correct grade, replace the spark plug/air filter and see what happens... |
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