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 HOMELITE CSP4016, CSP4518, CSP4520, d4150b, i4150b, d4550b, i4550

$24.11

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Piston Kit for HOMELITE CSP4016, CSP4518, CSP4520, d4150b, i4150b, d4550b, i4550 and related spare parts.

Details

This listing is about a brand new after-market Piston KitHow to find the size of a piston ring for the following HOMELITESpare Parts for HOMELITE machines models, 43mm in diameter, and replaces OEM Part #UP00130:

CSP4016
CSP4518
CSP4520
d4150b UT10801
d4150b w/cc UT10802
i4150b UT10808, UT10839
d4550b UT10787, UT10832
d4550bc UT10826, UT10836
i4550b UT10807, UT10834
25av UT10803
25av w/cc UT10804
27av UT10805
27av UT10805, UT10831
27av w/cc UT10825, UT10827, UT10830, UT10835

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Specifications

Specifications
Country of Origin	India
Product Code	1031185
Compatible Brand	HOMELITE
Compatible Models	HOMELITE UT-10939, UT-10830, 25av w/cc, UT-10938, UT-10827, 27av, UT-10831, i4150b, UT-10839, 27av w/cc, UT-10835, UT-10825, UT-10834, UT-10836, UT-10832, CSP4520, UT-10803, UT-10826, UT-10801, d4150b, i4550b, d4550bc, UT-10805, d4150b w/cc, UT-10804, UT-10940, d4550b, CSP4016, UT-10802, UT-10787, UT-10807, UT-10808, UT-10875, UT-10876, CSP4518, UT-10877, 25av
OEM Part #	UP00130, UP00130A, 5131000929

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