PUMP BODY 676-44311-00 REC676-44311-00

Function and technical context

The 676-44311-00 pump body is the central component of the cooling system on Yamaha outboard engines, housing the drive mechanism that circulates seawater through the engine's cooling passages. This part works under constant pressure and direct exposure to salt water, being responsible for maintaining the continuous flow of coolant to the internal galleries of the engine. Its correct operation is critical: a failure in the pump causes immediate stopping of water circulation, which generates rapid overheating of the engine and risk of catastrophic failure in a short time.

When to replace this part?

Wear of the pump body is manifested by progressive reduction in water flow (visible by the increasingly weaker purge jet), leaks in the seals or audible cavitation during operation. It is recommended to inspect this part at each seasonal inspection and replace it preventively after 5-7 years of intensive use or if symptoms of pressure loss appear. Changing the pump body preventively prevents water cooling and costly cylinder head or cylinder repairs due to overheating.

Equivalent manufacturer part numbers