Water Pump Impeller Kit – Fits Mercury Marine 25-50 HP, Force 40-50 HP (Replaces 821354A2, 821354A1, 821354A04, 18-4531) 5.5HP followed by the upper (vent)

followed by the upper (vent) screw to allow air to enter

Installs in the lower unit/gear case to restore engine cooling performance

and check for any exhaust or water leaks

Product Type Water Pump Impeller Material Neoprene Rubber Compound Blades 6 Drive Shaft Style Key Drive Dimensions (Product) 12

What is the difference between this impeller and the original Yamaha OEM part

Water Pump Impeller Kit – Fits Mercury Marine 25-50 HP, Force 40-50 HP (Replaces 821354A2, 821354A1, 821354A04, 18-4531) 5.5HP followed by the upper (vent)Product Details This Water Pump Impeller Kit Fits Mercury Marine 25 50 HP (Replaces 821354A2, 821354A1) provides all the necessary components for a complete water pump overhaul. It is designed for Mercury Marine 25 50 HP 4 Stroke outboards from 1998 and newer, including 25, 30, 40, 45, and 50 HP models. It also fits select Force 40 50 HP engines from 19951997. This kit serves as a direct replacement for Mercury Quicksilver part numbers 821354A1,