The Holley 135-9 is a 50cc accelerator pump diaphragm for Model 2300, 4150, 4160, and 4500 carburetors equipped with the 50cc pump housing. Molded from GFLT fluoroelastomer, it withstands the oxygenated pump gas and alcohol-based fuels that break down standard rubber diaphragms, making it a reliable fix for a carburetor that stumbles or leaks fuel on initial throttle tip-in. Mounting screws are not included and are reused from the original diaphragm.

Holley 135-9 Features:

• 50cc accelerator pump diaphragm
• GFLT construction compatible with alcohol and oxygenated fuels
• Fits Holley Model 2300, 4150, 4160, and 4500 carburetors with 50cc pumps
• Supplied without mounting screws
• Sold individually