28421-Z1B-D10 Starter Reel - Overview. The 28421-Z1B-D10 Starter Reel is an essential component in the Honda marine engine starter system. This OEM reel supports the recoil starter mechanism, facilitating manual engine starting by enabling the pull cord to engage and turn over the engine effectively. Designed specifically for Honda marine engines, it ensures reliable operations and durability under demanding marine conditions. Engineered to fit perfectly, it integrates seamlessly with existing s