YAMAHA WATER PUMP BODY 63V-44301-00 REC63V-44301-00

Function and technical context

The water pump body is the central component of the cooling system in Yamaha outboard engines. This piece houses the impeller and channels the flow of seawater towards the internal galleries of the engine, extracting the heat generated during combustion. Its correct operation is essential to maintain the operating temperature within safe parameters; Any obstruction, corrosion or wear of the body compromises coolant circulation and causes engine overheating, with the risk of irreversible damage to cylinders, gaskets and crankshaft blades.

When to replace this part?

The pump body should be inspected regularly for cracks, scale deposits or marine corrosion, especially after sailing in brackish waters or when loss of cooling or abnormal temperature rise is detected. Although there is no fixed maintenance interval, it is recommended to check its condition at each seasonal maintenance and replace it preventively if it presents internal erosion or water leaks; This investment avoids unplanned shutdowns at sea and costly repairs of engines blocked by overheating.

Compatible Yamaha engines

Equivalent manufacturer part numbers