First off, make sure it is not just stuck. This can be accomplished by adding lubricating oil to the empeller. If that doesn't do the trick, then refer to manufacturers directions to fix the problem.
The impeller on a 9.8 Mercury outboard boat motor can be easily changed. Remove the retaining bolt. The impeller will come off. Reverse the process to install the new impeller.
The water pump impeller on a 7.5 hp Mercury outboard, is located on top of the gearcase, and is driven by the driveshaft.
Synthetic Rubber
Change the water pump impeller, they get old and need replacing every 5 years or so depending on wear.
18-3085 sierra
The impeller on an ESKA outboard motor is typically located within the water pump assembly, which is situated at the lower unit of the motor. To access it, you usually need to remove the lower unit from the motor. The impeller is housed inside a plastic or metal housing that can be disassembled for maintenance or replacement. Proper care and regular checks of the impeller help ensure optimal cooling and performance of the outboard motor.
To replace the impeller on a 35hp Mercury outboard motor, first, ensure the engine is off and disconnect the battery. Remove the lower unit by unscrewing the bolts and disconnecting the shift linkage. Take out the old impeller from the water pump housing, clean the area, and then install the new impeller, ensuring it is oriented correctly. Reassemble the lower unit and reconnect the battery before testing the motor.
Propeller is external (outboard motor on a boat) Impeller is internal (vehicle water pump).
Changing the impeller on a Johnson 70 hp outboard motor requires pulling the power head and disconnecting the engine. Once this is done, an open end wrench can be used to first loosen the fitting before removal.
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i have a mercury outboard motor the serial# is G034632