Author Topic: MS250 - piston / cylinder need replacing ?  (Read 499 times)

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Offline KilliansRedLeo

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Re: MS250 - piston / cylinder need replacing ?
« Reply #10 on: May 05, 2014, 10:16:33 pm »
The saw breathes through the case. Excess air coming in from the outside leans out the fuel/air mixture. Too lean fuel/air mixture creates excess heat causing premature wear/damage to the saw. Lean=more air than necessary.
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