Sockets for removal of pump and pump cover.
Razor or gasket scraper.
Impeller removal tool (if available).
New impeller and gasket.
1).IMPORTANT TURN off the engine freshwater thru-hull.
2). Locate pump on starboard front of engine and remove the 2 mounting bolts. Slip belt off pump.
Once removed loosen the hose clamps and rotate the pump so you can access the pump cover.
3). Remove cover nuts. A light tap on the side of the cover should it stick will make it pop right off.
5) Using an impeller tool if available or simply pull out the old impeller. If it is stuck you may pry out or grab using slip joint pliers. Just do not score the pump surfaces.
6). Notice the missing blade on the old impeller. It is important to located all the missing blades to ensure no blockage occurs.
Usually blades will be just outside the pump outlet (the right hand side here). In this case the missing blade was found in the hose before the heat exchanger.
7). Now clean the impeller cover carefully with a razor and remove all old gasket material.