The impeller is located in the lower section of the motor near the prop. Take the two nuts off and the lower unit will separate from the top. Remove the O ring and the seal from the long shaft before removing the two nuts from the water pump housing. Good luck removing the impeller itself. I had to cut the soft brass ring with an oscillating tool. A paint can opener also helped in the removal.
The water pump impeller on a 7.5 hp Mercury outboard, is located on top of the gearcase, and is driven by the driveshaft.
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 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.
Synthetic Rubber
The impeller is located inside the water pump housing, on the topside of the gearcase. The gearcase will have to be removed in order to service it.
The 15 horsepower Mercury outboard motor does not have a water pump. The outboard motor is air cooled and does not have a need for circulating water.
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).
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