Impeller housing Asy 8M0139978

• Impeller housing Asy 8M0139978

Impeller housing Asy 8M0139978

This impeller generates the flow rate of the raw water pump for engine cooling.

It runs in the pump housing on the drive shaft. Hardened, torn or broken blades reduce the cooling capacity and increase the risk of overheating.

Component classification: Impeller / pump impeller of the raw water pump

System function: Pumping the raw water in the cooling water circuit

Compatible manufacturers: Mercury / MerCruiser

Compatible models: various Mercury and MerCruiser engines - check serial number

Reference numbers:

• OEM: 8M0139978

FAQ

What is the exact task / function of the component?
The component fulfills a specific mechanical or electrical function in the respective engine or drive system, such as fuel routing, electrical switching, sealing or transmission of movement. It ensures that the associated system circuit works correctly and that other components are reliably supplied or controlled. How do you recognize a defect / typical symptoms?
Typical signs are malfunctions of the affected assembly, irregular engine running, starting problems, pressure loss, leaks or error messages in the system. Visible damage, corrosion, material fatigue or loose connections can also indicate a defect. How do you check or test the component?
Electrical components are checked for voltage, resistance or continuity using a multimeter, and plug contacts and cables should also be checked visually. Mechanical components should be checked for cracks, wear, deformation, leaks, correct fit and free movement. When should the component be replaced?
Replacement is necessary if malfunctions occur, electrical measurements are outside the manufacturer's specifications or there is visible damage. Preventive replacement is advisable during major maintenance, motor overhauls or when age-related material wear is to be expected. How do you check compatibility with your own engine?
Compatibility is checked using the original part number, existing reference numbers and the technical specification. In addition, the design, connection type, connector type and relevant dimensions should be compared with the existing component or the manufacturer's documentation.