If your Johnson or Evinrude outboard is overheating or not pumping water properly, this water pump rebuild kit from The ROP Shop has everything you need to get it running cool again. It's designed to replace OEM part numbers 0396644 and 396644, and it includes all the crucial components: a new impeller assembly, impeller housing cup and plate, two impeller housing gaskets, two grommets, a drive key, an O-ring, and four screws. The only thing not included is the actual impeller housing itself - the new cup inserts right into your existing housing. Before ordering, definitely double-check your engine's model number, serial number, and horsepower to make sure this is the exact right kit for your specific motor. Nothing's worse than getting the wrong parts when you're trying to fix your boat. The quality seems solid, and having all the components together in one kit saves you from hunting down individual parts. For any boat owner who's comfortable doing basic maintenance, this is a straightforward repair that can save you a ton on mechanic costs. Just take your time, follow the service manual, and you'll have your outboard pumping water like new in no time.