Flywheel (magneto) for petrol chainsaw TOR4945S — part YTOR49MG

Replacement flywheel (magneto) for petrol chainsaw TOR4945S — part YTOR49MG is a spare mechanical component designed to restore ignition timing and magneto function in TOR4945S chainsaws. The component integrates the flywheel mass and the magneto poles required for generating the magnetic field that induces current in the ignition coil, enabling spark generation and charging of small onboard electrical circuits. This part is intended for maintenance and repair tasks where original flywheel performance has degraded, where ignition timing needs verification, or where the magneto is damaged or faulty.

Advantages

This flywheel is designed to match the mechanical and magnetic requirements of TOR4945S petrol chainsaws, providing consistent ignition timing and reliable magnetic flux for the ignition coil. As a replacement part, it allows restoration of starting performance and stable engine operation without requiring modification to the saw’s engine housing or ignition system. The integrated design supports both spark generation and limited electrical output for systems that rely on the magneto.

Suitable for

• Repair and maintenance of TOR4945S petrol chainsaws
• Replacement of worn or damaged flywheel/magneto in compatible small two-stroke engines
• Servicing ignition problems such as weak or absent spark
• Restoring charging capability for small onboard electrical components

Key specifications

• Function: Flywheel with integrated magneto for ignition and small electrical output
• Compatibility: Designed for TOR4945S petrol chainsaw model
• Material: Cast metal flywheel with embedded magnets (typical for magneto flywheels)
• Mounting: Engine crankshaft-mounted flywheel with keyed or splined fitment (matches TOR4945S crankshaft interface)
• Purpose: Restores ignition timing and enables spark generation

How to use

Before installation, disconnect the spark plug boot and ensure the chainsaw is cool and free from fuel leaks. Remove the starter cover and any components obstructing access to the flywheel. Unscrew and extract the existing flywheel using appropriate pullers or tools recommended for TOR4945S engines, taking care to note or mark the timing position if required. Fit the replacement flywheel onto the crankshaft in the same orientation, ensuring the keyway or spline meshes correctly. Tighten the flywheel retaining nut to the manufacturer’s specified torque and reassemble removed components. Reconnect the spark plug lead and verify ignition and safe starting function.

Usage recommendations

Use appropriate hand tools and a flywheel puller designed for small engines to avoid damage. Verify correct ignition timing and secure mounting torque after installation. Inspect the ignition coil, spark plug, and wiring for faults if ignition issues persist. Replace the flywheel only with parts specified for TOR4945S to ensure proper fit and engine performance.