Brand Part Number Notes Mercury Marine 27-18272 Mercury Marine 27-97863 Superseded by 27-18272 Sierra 18-0881 GLM 32470
Ensure the Woodruff key is correctly seated on the driveshaft before sliding the new impeller on
The kit includes the correct key
Designed for complete service of the lower unit water pump assembly
A visual inspection for cracks
Water Pump Impeller Kit – Fits Johnson/Evinrude 4-8 HP Outboards (Replaces 396644, 0396644, 18-4529) 350HP Brand Part Number Notes MercuryProduct Details This Water Pump Impeller Kit Fits Johnson Evinrude 4 8 HP Outboards (Replaces 396644) provides everything needed for a complete water pump service. It is designed for Johnson Evinrude 4 HP (19861992), 5 HP (19801983, 19962001), 6 HP (19842005), and 8 HP (19802005) outboard engines, ensuring reliable cooling performance. This kit serves as a direct replacement for Johnson Evinrude part number 396644 0396644, Sierra 18 4529, and GLM