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White smoke coming from exhaust on Stihl 201TC

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Can chain oil leak into the crankcase if the crankcase gasket slips on this saw?

Don’t know but sounds eminently plausible.


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There is no smoke arrestor on the 201. Smoke is generally too much oil in the fuel, usually found on home owner kit. The saw can run rich but there are limiters on the H screw stopping it running too rich....rich means too much fuel mix entering the saw causing it to not rev out correctly...ignore the "too much oil being lean" comments as it is loosely technically correct but not the way anyone involved with two strokes and their tuning would describe "lean".

You could turn the H screw all the way clockwise up to the limiter, make sure you are using decent oil 50:1 mix and see how it goes 

It is possible the saws oil tank is leaking in to the crankcase, not seen this on a 201 but if it still smokes after the above, empty the oil tank fully and run the saw up without the b&c and see if it goes away.

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On the odd occasion I've been rushing and given the fuel tank a shot of Aspen bio chain oil, I've given the tank a rinse or two but have then been treated to the smell of grilled sardines afterwards.

I don't think Aspen is 100% veg based.


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