Starter sprocket (piła rozrusznik) AWTools AW90045 for Husqvarna CS450 CS520 CS580 CS620 chainsaws

AWTools AW90045 starter sprocket (piła rozrusznik) is a replacement toothed wheel designed for use in the recoil starter assembly of compatible petrol chainsaws. It transfers the pull-cord motion to the engine, enabling ignition and reliable starting. This component is compatible with chainsaw models CS450, CS520, CS580 and CS620 and is intended for maintenance and repair of worn or damaged starter mechanisms.

Advantages

The starter sprocket is manufactured to match the shape and tooth profile required by the original starter assembly, providing a secure fit and consistent engagement with the starter rope and pawls. Its construction supports repeated starting cycles and restores proper starter function without the need for a full starter replacement. The part helps reduce slipping and incomplete engagement that can occur with worn sprockets, contributing to faster and more reliable engine start-up.

Suitable for

• Repairing or replacing a worn starter sprocket in compatible chainsaw models
• Routine maintenance of the recoil starter assembly
• Restoring reliable pull-start operation after slipping or tooth damage
• Workshop or field repairs where original starter performance must be reinstated

Key specifications

• Function: toothed starter sprocket for recoil starter assemblies
• Compatibility: designed for use with CS450, CS520, CS580 and CS620 chainsaw models
• Material: durable metal suitable for starter mechanism loads
• Design: matching tooth profile for consistent engagement with starter rope and pawls
• Application: replacement part for petrol chainsaw starter units

How to use

Before installation, ensure the chainsaw is switched off, cooled and the spark plug lead is disconnected. Remove the starter housing according to the chainsaw manufacturer’s service instructions to access the recoil starter assembly. Carefully remove the damaged sprocket and install the AWTools starter sprocket in the same orientation, ensuring correct alignment with the starter rope and pawls. Reassemble the starter housing and test pull the cord to verify smooth engagement and proper recoil before reconnecting the spark plug lead and starting the engine.

Usage recommendations

Use appropriate hand tools and follow the chainsaw manufacturer’s safety and service guidelines when replacing starter components. Inspect the starter rope, rewind spring and pawls for wear and replace any additional worn parts to ensure long-term reliable starting performance.