14221-PWA-003 Tdc Pulser Plate - Overview. The 14221-PWA-003 Tdc Pulser Plate is a critical component of the ignition system in Honda marine engine systems. It functions by generating precise timing signals when the crankshaft reaches Top Dead Center (TDC), which is essential for accurate ignition timing and smooth engine operation. Designed to fit various Honda engines, this part ensures seamless integration with existing parts, maintaining optimal performance and durability.. Key Features. Ess