18-4218 For Mercruiser 22-16951A1,16951Q1 Cylinder Block Drain Tap 1/4NPT MD

18-4218 Cylinder Block Drain Tap for Mercruiser

This 18-4218 cylinder block drain tap is a replacement service part for Mercruiser engines and is cross-referenced to OEM numbers 22-16951A1 and 22-16951Q1.

Overview

This cylinder block drain tap is a 1/4 NPT service component for draining coolant from the block. It is designed for Mercruiser applications with OEM cross-reference numbers 22-16951A1 and 22-16951Q1. This 18-4218 drain tap supports cooling system maintenance and winterization.

Built For Performance

• 1/4 NPT cylinder block drain tap for engine service
• Replacement part for Mercruiser drain tap applications
• Cross-referenced to OEM numbers 22-16951A1 and 22-16951Q1
• Designed for standard cylinder block drain openings
• Supports coolant removal during marine engine maintenance

On-The-Job Use

• Draining coolant from cylinder blocks during cooling system service
• Winterizing marine engines by removing trapped water from the block
• Maintaining stern drive power packages in marine repair shops
• Replacing worn drain taps on engine blocks

Specs At A Glance

Good To Know

Q: What are the OEM cross-reference numbers for this drain tap? A: This drain tap uses OEM cross-reference numbers 22-16951A1 and 22-16951Q1 for Mercruiser applications.

Q: Is 1/4 NPT the correct thread size? A: Yes, this cylinder block drain tap has a 1/4 NPT thread. Confirm the port size before installation.

Slight variation in finish or dimensions may occur between production runs, and fit can depend on serial number, so confirm compatibility before ordering.