Where is the impeller located on a MerCruiser?
MerCruiser Diagrams: See various part diagrams for Alpha Sterndrive models with water pump impeller located in the lower unit as well as the Bravo Sterndive models where the Sea Water Pump Impeller is mounted within the engine mounted Sea Water pump. View Diagram s Step #1: Verify that the temperature gauge is reading accurately.
What happens when a Mercury outboard water pump fails?
This Mercury outboard water pump was run dry briefly, and the impeller literally melted within the housing. You can see the imprint of the impeller on the back. In this case the entire water pump was replaced. When the impeller fails, the pump can’t pump and the engine will overheat.
How do you remove impeller from Mercury 3.3 2stroke?
Pull off a rubber cap on the side of the bottom of the drive leg and undo a screw that joins the two parts of the gear linkage. Undo two bolts and take off lower section of drive unit: another 4 bolts then become visible on a small casing over impeller. Undo and take out impeller and metal ring in which it runs. Dead easy so far.
Why did my outboard water pump impeller melt?
We make changing the impeller part of our off-season lay-up program, because if it fails you can have much more expensive problems.” This Mercury outboard water pump was run dry briefly, and the impeller literally melted within the housing. You can see the imprint of the impeller on the back. In this case the entire water pump was replaced.
When to replace the impeller on a Mercury outboard?
Whenever you have to remove the lower unit from your outboard, it’s worth replacing the impeller, driveshaft and shift shaft oil seals in one go. Follow the steps below and watch the video above to learn how to replace the impeller and repair the water pump on a Mercury 200HP outboard.
How to find out model number of Mercury outboard motor?
Simply enter the original model or serial number assigned to your outboard motor by Mercury Marine. Mercury uses a specific system when assigning either serial or model numbers to their Mercury Outboard Motors, however either of these can be used to lookup OEM parts for your motor.
Where can I find outboard motor parts online?
Using our simple outboard catalog parts lookup you can quickly locate the correct OEM Parts from Mercury Marine near you. What’s more convenient than using our simple Mercury Direct Online Diagrams to shop from the convenience of your home. Simply enter the original model or serial number assigned to your outboard motor by Mercury Marine.
How do you install an impeller on a water pump?
Put a dab of grease on the woodruff key to prevent it from falling out of its channel in the driveshaft. Step 10. Install the impeller over the driveshaft and onto the woodruff key. Watch the clip below to see the impeller installation segment of our Mercury 200XL Verado water pump and impeller repair video.