19300-ZVP-003 Thermostat Assembly - Overview. The 19300-ZVP-003 Thermostat Assembly is a vital component in Honda marine engine systems. It regulates the engine temperature by controlling the flow of coolant, opening and closing at precise temperature points to maintain efficient engine operation and prevent overheating. Designed specifically for Honda marine engines, it ensures seamless integration with existing parts, maintaining optimal performance and durability.. Key Features. Regulates engine temperature by controlling coolant flow.. Genuine OEM Honda part ensuring exact factory specifications.. Designed to maintain optimal engine operating temperature and prevent overheating.. Precisely matches factory dimensions and tolerances for perfect fitment.. Integrates cleanly with existing hardware, seals, and housings in the cooling system.. Supports reliable engine performance and longevity through accurate temperature control.. Why Choose Genuine OEM. Using original Honda parts like