Sierra/Prime Line 18-3400 Water Pump Kit

18-3400 Water Pump Repair Kit - Johnson/Evinrude. Engine Systems /Engine Parts /Cooling Systems /Water Pump Systems /Water Pump Parts. 18-3400 Water Pump Repair Kit - Johnson/Evinrude. Make the most of the boating season by starting with a fresh water pump. Outboards rely on the water pump to maintain safe operating temperatures. Any restriction to the water flow can result in overheating the engine. Sierra makes servicing Johnson/Evinrude outboard water pumps easy by packaging all the necessary parts in a single kit. Each component is engineered to meet or exceed manufacturer specifications. Sierra service kits eliminate the time to search and source individual parts, so that you can focus on restoring optimum function to the water pump and getting back on the water. Key Features. Kit components are engineered to meet or exceed OEM specifications. Pre-packaged kit eliminates time searching and sourcing individual parts. Kit includes impeller, impeller key, wear plate, water pump cup, oil seal, O-rings, stainless steel bolts and grommets. The Sierra Engine Parts Selector. In addition to water pump kits, we offer a wide variety of other engine parts manufactured by Sierra. To see if we have the part you need, see our Engine Parts Selector, where you can search by engine make, serial number and model or year of manufacture. GLM 12251. Johnson/Evinrude Outboard 391698, 394711. Mallory 9-48220.