Lycoming 72198 Piston Pin Plug is a replacement engine component designed for installation at the ends of the piston pin in compatible Lycoming aircraft piston engines. This plug replaces the earlier LW-11775 part number and provides protection and proper positioning of the piston pin within the piston assembly.

The piston pin plug helps prevent direct contact between the piston pin and the cylinder wall during engine operation, reducing the risk of scoring or damage to critical engine components. Its function is essential for maintaining proper piston assembly clearance and supporting smooth reciprocating movement within the cylinder.

Manufactured to Lycoming specifications, the 72198 piston pin plug is designed to withstand the high temperatures, combustion forces, vibration, and continuous reciprocating motion present inside aircraft piston engines. Precision dimensions ensure proper fit and reliable performance during normal engine operation.

The piston pin plug should be inspected during cylinder removal, piston inspection, and engine overhaul procedures. Replacement is recommended whenever wear, cracking, deformation, or other damage is found to help maintain piston assembly integrity and protect the engine cylinder.

Key Features

- Part Number: 72198
- Manufacturer: Lycoming Engines
- Component: Piston Pin Plug
- Replacement For: LW-11775
- Protects the cylinder wall from piston pin contact
- Maintains proper piston pin positioning within the piston assembly
- Precision-manufactured for accurate fit and reliable operation
- Designed for high-temperature and high-cycle aircraft engine environments
- Suitable for compatible Lycoming aircraft engines