WATER PUMP KIT 6G1-W0078-A1

Function and technical context

The water pump is the central component of the cooling circuit in marine petrol engines. Its mission is to push seawater or fresh water through the engine block, cylinder head and heat exchangers to evacuate the heat generated during combustion. This kit includes the complete pump assembly with impeller, housing and shut-off components, working directly on the engine cooling system. Without a functional pump, the engine cannot regulate its temperature properly, causing rapid overheating, damage to cylinder seals and, in extreme cases, engine seizure while underway.

When to replace this part?

The most common symptoms of water pump wear include water leaks in the mechanical seal area, engine temperature gradually rising even at normal cruising speeds, and audible cavitation (harsh sound) coming from the pump area. Synthetic rubber impellers require annual inspection and replacement every 3-5 years or when they show cracks, erosion or visible deformation. Replacing the pump kit preventatively is the best practice to avoid costly breakdowns during the boating season, especially before long voyages.

Equivalent manufacturer part numbers