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 JONSERED 2071 EPA, 2171 EPA, CS2171 EPA Pop-Up (52mm) Big Bore

$43.40

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Piston Kit for JONSERED 2071 EPA, 2171 EPA, CS2171 EPA Chainsaws Pop-Up (52mm) Big Bore and related spare parts.

Details

This listing is about a brand new after-market Big-Bore Piston KitHow to find the size of a piston ring in its original package for the following JONSEREDSpare parts for JONSERED machines models which replaces OEM Part #503 93 92-71. Note: This item fits models equipped with the after-market big-bore cylinder with diameter 52mm:

2071 EPA (1999-03)

2171 EPA (2000-04)
2171 EPA (2001-10)
CS 2171 EPA (2003-05)
CS 2171 EPA (2005-05)
CS 2171 EPA (2007-01)
CS 2171 EPA (2010-05)

Be Good to your JONSERED. Avoid poor-quality parts!

This high-performance Piston Kit comes directly from a top-quality ISO-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!