This is the pump seal used on the Keene P100, P150, P160, and P180 pumps used on 3HP – 6.5HP Briggs and Honda pumps for at least the last 30 years. Also used on some other brands and types of pumps.

See attached diagram for these instructions. There is also a video attached showing the process for installing a P90G pump seal. Although it is a smaller pump and seal the process is identical.

1. Before installing the mounting plate (7) to the engine, the spring portion of the water pump seal (5) must be installed. Place this portion of the seal into the center of the mounting plate, with the use of a light hammer and or blunt instrument and a seal setting tool. Tap the perimeter metal portion of the seal to set the seal into position. Care must be taken to avoid contact with the carbon portion of the seal. A small amount of Silicone Rubber Cement placed in this section will insure a water tight seal.

2. Fit “O” Ring gasket into “O” slot on the front face of the mounting plate, making sure that it is properly seated. Place the ceramic portion of the water pump seal (4) into the center of the impeller (3) firmly, using the heal of your hand to insure a proper fit. The ceramic surface of the seal must be facing outwards.