2005+ Mercury Verado 4 Stroke 200/225/250/275 6 gear housing Service Manual, Page 77Get this manual
Right Hand Rotation
Water Pump Installation
1Install water pump base gasket2Install water pump face plate3Install water pump cover gasket4Place small amount of 2-4-C with Teflon on the flat surface of the impeller key and install the key onto the driveshaft keywayIMPORTANT: When using an impeller whose blades have taken set, face the curl of the blades in counterclockwise directionDo not install the impeller with its blades oriented in reversed direction from original rotationor premature impeller failure will occur5Assemble the water pump impeller onto the driveshaft and down over the key