The Makita 123357-3 Concrete Saw Starter Assembly is a starting component used in compatible Makita concrete saw models. It houses the recoil rope and pulley mechanism that turns the engine over, allowing the operator to start the saw with a quick, firm pull. The starter assembly works as part of the engine’s starting system and supports consistent, dependable starts. https://www.wholetoolbox.com/makita-123357-3-concrete-saw-starter-assembly/123357-3.html