Throttle Cable Spring Seat, For All Aircooled VW

OVERVIEW

When it comes to maintaining the smooth, responsive throttle action that every air-cooled enthusiast craves, it is often the smallest components that make the biggest difference. This EMPI Throttle Cable Spring Seat, designed to meet or exceed original equipment specifications (Part Number 113-129-909), is a vital piece of the puzzle for your Volkswagen''s accelerator linkage. Positioned at the end of the throttle cable spring, this seat provides a stable, friction-reducing surface that prevents the spring from digging into the carburetor linkage or the fan shroud guide tube. Without a properly functioning spring seat, you may experience a "sticky" pedal feel, erratic idling, or even a throttle that fails to return to the closed position, which can be a significant safety hazard during spirited driving or daily commuting.

Crafted with precision to ensure a perfect fit across a massive range of vintage VW models, this spring seat is an essential item for any carburetor rebuild or engine bay restoration. It is common for original seats to become lost during maintenance or to suffer from decades of vibration-induced wear, leading to a notched surface that catches the spring coils. By installing a fresh, high-quality steel seat, you ensure that the return spring tension remains consistent and centered. Whether you are finishing off a show-quality restoration on a Split Window Beetle or just trying to get your weekend Dune Buggy back on the trail, this small but mighty component ensures your throttle cable operates with the factory-fresh precision that Volkswagen engineers originally intended.

FITMENT

This throttle cable spring seat is a universal fitment for virtually all air-cooled Volkswagen models equipped with a standard throttle cable return system. Detailed fitment includes:

• Volkswagen Type 1 Beetle: All years and models from 1946 through 1979 (Standard and Super Beetle).
• Volkswagen Type 2 Bus / Transporter: All models from 1950 through 1971 (including Kombi, Microbus, and Single/Double Cab).
• Volkswagen Type 3: Fastback, Squareback, and Notchback models from 1961 through 1973.
• Volkswagen Karmann Ghia: All coupe and convertible models from 1955 through 1974.
• Volkswagen Type 181 Thing: All models from 1973 through 1975.
• Custom Builds: Fits most Dune Buggies, Sand Rails, and Trikes utilizing a stock-style VW throttle linkage and fan shroud.

SPECS

The following technical specifications ensure that this part integrates seamlessly with your existing throttle assembly:

• OEM Reference Number: 113-129-909.
• Manufacturer: EMPI.
• Outer Diameter (OD): 11.95mm for precise fitment against the return spring.
• Material: High-strength stamped steel for long-term durability.
• Finish: Zinc-plated or natural steel finish for corrosion resistance in the harsh engine bay environment.
• Function: Centers the throttle return spring and prevents wear on the linkage components.
• Compatibility: Designed for use with standard 1.5mm and 2.0mm throttle cables.

PRO TIPS

Tip 1: Check for Grooving and Burrs

Before installing your new throttle cable spring seat, take a moment to inspect the end of your throttle return spring and the guide tube exit. Over time, a missing or worn seat can cause the spring to create a "groove" in the metal surfaces. If you find any sharp burrs or deep notches, use a fine-grit sandpaper or a small needle file to smooth them out. Installing a new seat on a damaged surface can lead to premature wear of the new part. A smooth mating surface ensures that the seat can rotate slightly as the throttle moves, which prevents the cable from binding or fraying over thousands of cycles.

Tip 2: Proper Lubrication is Key

While the spring seat is designed to reduce friction, a tiny amount of high-temperature synthetic grease goes a long way. Apply a very thin film of grease to the side of the seat that contacts the spring and the side that rests against the carburetor linkage or fan shroud. This "wet" interface prevents "creaking" sounds when you press the pedal and ensures that the return spring can snap the throttle shut instantly when you lift your foot. Be careful not to use too much grease, as it can attract road dust and grime, which eventually creates an abrasive paste that wears down the metal components.

Tip 3: Verify Full Throttle Geometry

Whenever you replace a component in the throttle linkage, it''s the perfect time to perform a "Full Throttle Check." With the engine off, have an assistant floor the accelerator pedal while you watch the carburetor linkage. Ensure that the throttle butterfly opens fully and, more importantly, that the new spring seat allows the linkage to return completely to the idle stop when the pedal is released. If the spring seat is misaligned or the spring is distorted, it might prevent the carburetor from returning to a true idle, leading to a "hanging" RPM. Always double-check that the throttle cable has a tiny bit of slack at idle to ensure the spring seat is doing its job of keeping the system under proper tension.