16130-ZY1-801 Auto Bystarter - Overview. The 16130-ZY1-801 Auto Bystarter is a critical component in Honda marine engine systems, specifically designed to support the carburetor choke system. Its primary function is to enrich the fuel mixture during cold engine starts and then gradually reduce this enrichment as the engine warms up to ensure smooth and reliable engine ignition and operation. As an automatic choke assembly, it seamlessly integrates with Honda marine engines to maintain consistent