Sierra 18-4226 Marine Engine Block Drain Plug with O-Ring

The Sierra 18-4226 is a threaded nylon drain plug designed specifically for MerCruiser marine engines. This essential cooling system component fits MerCruiser V4, V6, and V8 cylinder blocks and exhaust manifolds, providing reliable drainage for engine winterization and maintenance procedures.

Key Features:

• Marine-grade nylon construction engineered to withstand harsh marine environments
• Includes O-ring seal for secure, leak-free installation
• Wing-style design allows for easy hand-tightening and removal
• Threaded design ensures proper fit in engine block and manifold drain ports
• Manufactured to meet or exceed OEM specifications

OEM Cross-Reference: Replaces Mercury Marine 22-806608A1, 22-806608A02, 22-8M0119211, GLM 13992, and Mallory 9-41203. This direct-fit replacement ensures compatibility with original equipment specifications while providing reliable performance for engine block and manifold drainage applications.

Sierra Marine is a trusted aftermarket supplier known for producing premium-quality marine engine parts that meet the demands of high-horsepower engines and challenging marine conditions.