How do you replace a water pump on 1989 mercury force 125 hp outboard?

To replace the water pump on a 1989 Mercury Force 125 HP outboard, start by removing the lower unit. Disconnect the shift rod and any associated bolts, then gently pull the lower unit down. Once removed, take off the water pump housing by unscrewing the bolts, and replace the impeller and gaskets. Reassemble the water pump and lower unit, ensuring everything is securely fastened and properly aligned before reattaching it to the engine.