For Mercruiser 1 R MR Alpha Water Pocket Cover & Tube Kit 18-3219 42724A3

Water Pocket Cover & Tube Kit for Mercruiser

This water pocket cover and pickup tube kit for Mercruiser Alpha drives is an aftermarket replacement for the raw water pump cover and hose, referencing factory part numbers 18-3219 and 42724A3 to restore cooling flow to the engine.

Overview

This water pocket cover and tube kit for Mercruiser Alpha drives replaces the worn plastic cover and inlet tube that feed raw water from the drive housing into the engine circulating pump. It is built for boat owners and mechanics who want a simple drop-in renewal of the Mercruiser water pocket assembly with the two common factory cross-numbers.

Built For Performance

• Direct-fit water pocket cover made from marine-grade glass-reinforced polymer
• Reinforced pickup tube resists kinking and crushing from clamp load
• Molded seal surface matches the pump housing to prevent air ingestion
• Includes new O-rings that seat the tube to the cover
• Corrosion-resistant fasteners included for a complete install

Specs At A Glance

Good To Know

Q: Is this for the Mercruiser Alpha and Alpha One pump? A: Yes, it is sized for the Mercruiser Alpha and Alpha One raw-water pump openings with a 2-bolt cover.

Q: Does this kit come with the tube and the cover? A: Yes, it includes both the water pocket cover and the pickup tube with the seals.

Slight variation in finish or dimensions can happen between production runs, and serial number affects fit, so confirm compatibility before placing your order.