A-B1691493-AI LINER-PORT model-420EST The diaphragm pumps fuel from

The diaphragm pumps fuel from the tank to the engine

Replaces Part Number: 379551R92

9280 (s/n JEE0031850 and later)

Super 77 RC

resulting in rough idling

A-B1691493-AI LINER-PORT model-420EST The diaphragm pumps fuel fromOne New Aftermarket Replacement Port Liner Fits Briggs and Stratton Small Engines This aftermarket replacement port liner Fits Briggs and Stratton (B&S) small engines used in a wide range of lawn and garden equipment. The port liner is an internal engine component that lines the intake or exhaust port area of the cylinder, helping to maintain proper engine efficiency and sealing. Replacing a worn or damaged port liner restores proper engine