To change the water pump impeller on a 2001 Mercury 115 HP outboard, first, remove the lower unit by disconnecting the shift linkage and unbolting the lower unit from the powerhead. Once the lower unit is removed, take off the water pump cover by unscrewing the screws and carefully lift the old impeller out. Install the new impeller, ensuring it is oriented correctly, and reassemble the water pump cover and lower unit. Finally, reconnect the shift linkage and secure the lower unit back to the powerhead.
The water pump impeller on a 7.5 hp Mercury outboard, is located on top of the gearcase, and is driven by the driveshaft.
You will probably have to drop the lower end of the outboard. Its sound hard but really it is usually quite simple. The pump is nothing more than rubber impeller on a brass collet.
change impeller or check for blocks in water lines
Change the water pump impeller, they get old and need replacing every 5 years or so depending on wear.
Every two years to be safe
Sprinkle liberally a vile of gypsy tears
18-3085 sierra
Propeller is external (outboard motor on a boat) Impeller is internal (vehicle water pump).
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.
First, remove the lower unit (there is a housing for the water pump). The drive shaft goes through the housing and turns impeller. Remove the housing, the impeller is on the shaft. Install the new impeller. When replacing the housing, turn the drive shaft clockwise to make it slide down over the impeller.
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.
A Mercury outboard water pump is a engine cooling system. A outboard water pump is what blows steam through to get the car cool,