Mercury – Pipe Plug – 22-8M0204652

The Mercury Quicksilver Pipe Plug 22-8M0204652 is an OEM threaded sealing plug used in select Mercury outboard and MerCruiser engine plumbing applications. It is commonly used to seal internal fluid passages, cooling circuits, manifolds, or block-related threaded ports where the correct pipe plug is required.

Key Features

• Genuine Mercury/Quicksilver pipe plug
• Part number: 22-8M0204652
• Also referenced as 8M0204652
• NPT-style threaded engine pipe plug
• Approximate dimensions: 0.45″ L x 0.53″ W x 0.53″ H
• Approximate weight: 0.02 lb
• Used in select fluid, cooling, manifold, or block plumbing locations

Engine Compatibility

Used on select Mercury outboard and MerCruiser engine applications. Fitment depends on the specific engine model, block architecture, manifold layout, and parts diagram location.

Serial Number Fitment Notice

Verify fitment by engine serial number and parts diagram before ordering. Threaded plugs can vary by thread type, size, sealing method, and installation location.

When This Part Needs Replacement

Replace this pipe plug if it is stripped, rounded, corroded, leaking, seized, missing, or damaged during service. It should also be inspected when servicing nearby cooling passages, manifold ports, drain points, or fluid channels.

Installation Notes

Confirm the thread size and sealing method before installation. Use only the thread sealant or O-ring arrangement approved for the specific Mercury application. If used with Mercury O-ring 25-20863, inspect or replace the O-ring at the same time to help prevent leaks.

Alternate/Superseded Part Numbers

Primary Mercury references: 22-8M0204652 and 8M0204652. Related sealing component: Mercury O-ring 25-20863, where applicable.

Parts Desk Insight

Small pipe plugs are easy to overlook, but the wrong thread style or sealing method can create leaks or damage the casting. Match the plug by part number and diagram location rather than by appearance alone.

Shipping: Ships same or next day for fast Canada wide shipping.