SeaEagles 135-10 30cc Accelerator Pump Diaphragm Kit for Holley 2300/4150 — 2‑Piece Replacement to Restore Throttle Response

SeaEagles 135-10 30cc accelerator pump diaphragm — a direct replacement diaphragm kit engineered to restore proper fuel delivery in Holley 2300 and 4150 series carburetors.

When an accelerator pump diaphragm leaks, cracks, or loses elasticity it can cause hesitation, stumble, or delayed throttle response. The SeaEagles 2-piece 135-10 kit is built to match the Holley 135-10 dimensions and restore the pump’s ability to deliver a measured 30cc shot of fuel on throttle application. This page explains fit, installation basics, and who benefits from keeping a spare on hand.

How does this diaphragm improve throttle response?

Replacing a worn or damaged diaphragm returns the accelerator pump to its designed fuel volume and timing, eliminating lean spots on quick throttle openings. The restored diaphragm helps maintain a consistent 30cc discharge that matches factory pump specs, so the engine receives the correct extra fuel pulse during acceleration.

• Restores proper 30cc fuel shot volume for Holley 2300/4150 carbs
• Reduces hesitation and stumbling on rapid throttle inputs
• Helps deliver predictable engine response for tuning and road use

Will this SeaEagles part fit my Holley carburetor?

The SeaEagles 135-10 kit is made to be compatible with Holley 135-10 style pump housings and works with many Holley 2300 and 4150 models that use a 30cc diaphragm. Verify your carburetor’s part number and pump size before ordering to ensure a correct match.

• Intended for Holley 135-10 style accelerator pumps
• Commonly fits Holley 2300 and Holley 4150 carburetor families
• Sold as a two-piece kit for replacing both diaphragm components if needed

How difficult is installation for a home mechanic?

Installation is straightforward for someone comfortable working with carburetor components and basic hand tools. You will remove the pump cover, inspect the bore and pump linkage for wear, replace the diaphragm, and reassemble with care to avoid pinching or misaligning the rubber parts.

• No special tools required—standard screwdrivers and shop rags suffice
• Clean the pump cavity and check mating surfaces before fitting
• Follow torque and gasket seating best practices to prevent leaks

What should I inspect while replacing the diaphragm?

Use the diaphragm replacement as an opportunity to inspect the pump bore, linkage, and check valves. Addressing related wear items during installation prevents repeat issues and ensures the new diaphragm performs as intended.

• Check pump bore for corrosion or gouges that can cause leaks
• Inspect pump lever and pivot for excessive play or wear
• Examine seals and gaskets; replace any that are cracked or flattened

Who is this for: The SeaEagles 135-10 30cc accelerator pump diaphragm kit is aimed at classic car restorers, hot-rod enthusiasts, performance tuners, and DIY mechanics who maintain Holley-equipped engines. It suits anyone who needs an exact-dimension replacement to regain reliable fuel delivery during throttle openings or to keep a quality spare on hand for maintenance and track-day prep. Always confirm compatibility with your specific Holley carburetor model and pump size before purchase to ensure correct fit and performance.