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we recommend replacing the water pump impeller and related components every 300 operating hours or every 3 years
It includes a variety of gaskets and small components to cover these variations
Product Type Thermostat Kit with Gasket and O-ring Installation Direct OEM replacement Fuel Type Gasoline Operating Temperature Thermostat opening temp: 150°F/65
marine-grade vinyl suitable for freshwater and saltwater environments
Water Pump Impeller Gasket – Fits Yamaha 40HP 50HP 2-Stroke (Replaces 663-44315-A0) 28HP we recommend replacing the waterProduct Details This Water Pump Impeller Gasket is engineered for Yamaha 2 stroke outboard engines including 40 HP (19841994), 50 HP (19841987), 50 HP Pro Series (19871990), and P50 models (19951996). Designed as a direct fit replacement, this gasket ensures reliable sealing between water pump components to maintain efficient cooling system performance. This gasket replaces Yamaha OEM part number 663 44315 A0. Critical seal for water pump impeller
