How can I determine whether my cylinder is reusable so as to replace just the piston?

The most common problem of a cylinder that needs replacement is in case there are scratches into the surface of the tube where the piston runs.

What other parts I may need to replace on my machine when replacing the piston?

To replace the piston you need to disassemble the engine, so you also need to replace the cylinder gasket, at least. Also, it is recommended to check the piston bearing.

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Piston Kit for STIHL 041 AV/AVQ/AVEQ/AVFBQ/FB/G, FS 20, FS 410 (44mm)

$35.20

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Piston Kit fit STIHL 041 AV/AVQ/AVEQ/AVFBQ/FB/G Chainsaws, FS 20, FS 410 (44mm) and related spare parts.

Details

This listing is about a brand new after-market Piston KitHow to find the size of a piston ring in its original package for the following STIHLSpare parts for STIHL machines models, 44mm in diameter:

041 AVQ
041 AVEQ
041 AVFBQ

041 FB
041 G

FS 20
FS 410

This high-performance Piston Kit comes directly from AIP, a top-quality ISO 9002-certified Manufacturer.
This top-quality Piston Kit is covered by a 2-year warranty.
No Exporters - No Intermediaries You buy at a competitive price, because we buy directly from the source!