PUMP BODY 61A-44311-00

Function and technical context

The 61A-44311-00 pump body forms the central housing for the water cooling system on Yamaha outboard engines. This piece houses the impeller and the internal ducts through which the cooling fluid circulates, allowing it to extract the heat generated in the cylinders and dissipate it to the outside through the hull or transom. Its correct operation is essential to maintain the engine temperature within safe operating parameters, avoiding overheating that could cause deformations in cylinder heads, degradation of gaskets and failure of critical internal components such as pistons and connecting rods.

When to replace this part?

The pump body should be inspected during seasonal maintenance, particularly after navigation in silty waters or areas where the system has experienced blockages or cavitations. The presence of water leaks around the gaskets, loss of pressure in the cooling circuit or the tendency of the engine to reach high temperatures without apparent cause are clear indicators that this part requires immediate replacement. A preventive replacement during scheduled maintenance prevents unexpected breakdowns during navigation and prolongs the useful life of the propeller.

Engine Compatibility Table

Equivalent manufacturer part numbers