Sierra 18-3237 Water Pump Impeller Repair Kit for MerCruiser Bravo Stern Drives

The Sierra 18-3237 Water Pump Kit is a complete impeller repair solution designed for MerCruiser Bravo I, II, and III stern drives manufactured from 1988 and newer. This high-quality aftermarket kit replaces MerCruiser part number 47-59362T6 and is engineered to meet or exceed OEM specifications for reliable cooling system performance.

Kit Includes:

• 18-3087 Impeller with single flat spot design
• 18-3350 Wear Plate
• 18-7163 O-Ring

Application:

• MerCruiser Bravo I, II, III stern drives (1988 & up)
• Serial number B664190 and higher
• Bravo drives with 1-piece plastic impeller housing

This kit is interchangeable with GLM 12084 and Mallory 9-48316. The impeller and water pump shaft feature a single flat spot for proper alignment during installation. Sierra marine parts are manufactured to deliver premium quality and durability in harsh marine environments, making this kit an excellent choice for cooling system maintenance and repair.