Echo Chain Saw CS590 2019 Flywheel Replacement

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Remove the flange nut

Wedge a flathead screwdriver between the chassis and the flywheel's spokes to prevent the flywheel from spinning.
Alternatively, you can seize the piston by inserting a rope down the spark plug shaft.
Use a 13 mm wrench to loosen and remove the flange nut located in the middle of the flywheel.

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