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 McCULLOCH CABRIO Plus 347B, 347L, 407B, 407L (40mm) [#538249181]

$36.99

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Piston Kit for McCULLOCH CABRIO Plus 347B, 347L, 407B, 407L (40mm) [#538249181] 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 McCullochSpare parts for McCULLOCH machines models, 40mm in diameter, and replaces OEM Part #538 24 91-81:

Cabrio Plus 347B (40cc edition)
Cabrio Plus 347L (40cc edition)

Cabrio Plus 407B
Cabrio Plus 407L

Our Piston Kits are branded and come directly from the top-quality Manufacturer METEOR.
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Specifications

Specifications
Country of Origin	Italy
Product Code	1003718
Compatible Brand	McCULLOCH
Compatible Models	McCULLOCH CABRIO Plus 347L, CABRIO Plus 407L, CABRIO PLUS 347B, CABRIO PLUS 407B
OEM Part #	538249181

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