Sierra 18-3217 Water Pump Impeller Kit for MerCruiser Alpha One

The Sierra 18-3217 Water Pump Impeller Kit is a comprehensive repair solution designed for MerCruiser #1, R, MR, and Alpha One stern drives through serial number D494568, as well as Mercury/Mariner 65 HP (4-cylinder) through V-6 outboards with short vane impellers. This complete kit contains all the essential components needed to properly service your marine engine's cooling system.

Complete Kit Includes:

• Water pump impeller made from neoprene rubber compound for flexibility and durability
• Water tube guide
• Impeller wear plate
• Seven (7) gaskets including water pump gaskets, base gasket, and drain screw gaskets
• Six (6) O-rings in various sizes
• Seal ring and grommet
• Water pump housing bushing

This impeller kit is engineered to meet or exceed OEM specifications and is manufactured to high quality standards with proper bonding and performance testing. The neoprene impeller material provides added flexibility for long-lasting performance in harsh marine environments. Note that the pump housing is not included with this kit; if a housing is needed, order Sierra 18-3316.

OEM Cross-References: Replaces Mercury/MerCruiser 46-96148A8, 46-96148A5 (without base or housing), 46-32437A1, 46-32437A3, 46-37433A1, 46-42579A4, 46-44292A4, 46-44579A4; GLM 12290; Mallory 9-48304, 9-48310.