Sierra 18-3471 Yamaha Water Pump Repair Kit with Housing
- Brand:
- Sierra
- Part no:
- 18-3471
Where to buy
View on Amazonpaid link
This Sierra repair kit rebuilds the water pump on late model Yamaha four-stroke outboards, and it comes with the pump housing instead of only the wear parts. It fits 225-350 HP engines and is described as a direct fit replacement for the OEM kit. Alongside the housing it holds an impeller, wear plate, impeller cup insert, gasket, oil seal, O-rings, key, bolt, washer and dowel pin.
Our take
With the housing in the kit, the part the impeller turns in is replaced along with the impeller, wear plate and oil seal, so you are not reusing an old casing. Sierra says it meets or exceeds OEM specifications for 225-350 HP Yamahas.