Sierra 18-3227-9 Water Pump Base Dowel Pin for Mercruiser Alpha I/R/MR & Mercury (Pack of 5)

The Sierra 18-3227-9 is a replacement water pump base dowel pin designed for use with MerCruiser Alpha I, R, and MR sterndrive engines, as well as Mercury outboard engines ranging from 20 to 225 HP (serial number 1866496 and up). Sold as a convenient pack of 5, this kit ensures you have the hardware on hand for routine water pump service or rebuild work.

Key Features:

• Replacement dowel pins for water pump base alignment and retention
• Compatible with MerCruiser Alpha I, R, and MR sterndrive units
• Fits Mercury outboard engines from 20 to 225 HP (serial 1866496 and up)
• Pack of 5 pins for complete service coverage
• Manufactured by Sierra International, a trusted aftermarket marine parts supplier

Sierra International is a leading manufacturer of aftermarket marine engine components, offering OEM-quality replacements at competitive prices. These dowel pins are an essential part of any water pump service kit, ensuring proper pump base seating and alignment for reliable cooling system performance.