Water pump repair kit 8M0155395 is for use on 4-60hp Mercury 4-stroke outboards (serial No. 0R411838 and higher). The kit includes the water pump impeller, impeller key, hardware, washers, impeller gaskets, wear plate and water pump housing/cup. Easy to install with common tools. See your owner's manual or service manual for specific applications and replacement instructions. Periodic maintenance and service helps protect your investment in your engine and your boating pleasure.