Piston Rings for Gasoline Chainsaw TOR4945S No name model YTOR49PT (34)

Piston rings for gasoline chainsaw TOR4945S are replacement engine parts intended for two-stroke chainsaw engines. These rings restore compression, reduce blow-by and help control oil consumption in the combustion chamber. Supplied under a no-name brand and sized for the indicated model, they are intended for use during routine maintenance and repair to return engine performance to working condition.

Advantages

These piston rings are manufactured to match the size requirements of the TOR4945S engine and are designed to provide an effective seal between the piston and cylinder wall. By restoring compression, they improve starting behavior and throttle response while limiting the passage of combustion gases and oil into the crankcase. The parts are compact, easy to store and replace during standard engine overhaul procedures.

Suitable for

• Repairing two-stroke gasoline chainsaw engines of the TOR4945S size family
• Restoring compression and improving engine starting
• Routine maintenance and piston/cylinder overhaul
• Replacing worn or damaged piston rings to reduce oil consumption and blow-by

Key specifications

• Compatibility: sized for TOR4945S two-stroke chainsaw engines
• Function: seal combustion chamber and control oil consumption
• Material: metal alloy suitable for piston ring applications
• Application: replacement part for standard piston/cylinder assemblies
• Quantity: supplied as the ring set sized for the specified engine model

How to use

Replace piston rings during an engine overhaul or when compression loss, excessive oil consumption or visible ring wear is detected. Disassemble the engine following the manufacturer's service procedure, remove the piston from the connecting rod, and carefully remove the old rings. Check the cylinder bore for scoring or wear and measure clearances according to service limits. Fit the new rings in the correct orientation and gap alignment, reinstall the piston and reassemble the engine. After assembly, run the engine at idle and then under light load to confirm correct seating and to verify compression and oil consumption.

Usage recommendations

Use appropriate hand tools and follow safety procedures when disassembling the chainsaw engine. If cylinder bores or pistons are excessively worn or damaged, address those components first to ensure the new rings can form a proper seal. Verify ring endgap and side clearances against service specifications before final assembly.