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Porsche 356B Carburetor Accelerator Bell Crank Bushings

Porsche 356B Carburetor accelerator bell crank bushings

Starting at $1.95, AutoBuffy stocks 1 carburetor accelerator bell crank bushings from URO. This small bushing sits at the pivot point of the bell crank lever that translates throttle cable movement into fuel delivery. When it wears out, the linkage develops slop, causing sluggish or erratic throttle response that can make the engine unsafe to drive.

Signs your Porsche 356B needs a new carburetor accelerator bell crank bushing

  • Throttle pedal feels loose or has excessive free play before the engine responds
  • Hesitation or stumble when accelerating from a stop, even with a recently tuned carburetor
  • Visible side-to-side wobble in the bell crank lever when the throttle linkage is moved by hand
  • Throttle does not return to idle smoothly or sticks slightly after releasing the pedal
  • Audible clicking or rattling from the carburetor linkage area during throttle actuation
  • Poor fuel economy or rough idle caused by inconsistent throttle plate positioning due to worn pivot slop

Which carburetor accelerator bell crank bushing should you buy for your Porsche 356B?

The main decision comes down to material and fit: OE-spec bronze or nylon bushings restore factory tolerances, while upgraded polymer or sintered metal options can outlast the original in high-heat environments. You should also confirm whether your Porsche 356B uses a single or dual bell crank setup, since bushing diameter and length differ between configurations.

OE-spec nylon bushing
Best for
Daily drivers needing a straightforward, cost-effective factory replacement
What you get
Matches original dimensions and material; restores stock throttle feel with minimal fuss
Bronze/sintered metal bushing
Best for
High-mileage vehicles or those driven in extreme heat or dusty conditions
What you get
Superior wear resistance and heat tolerance over nylon; longer service life at the pivot point
Polyurethane bushing
Best for
Performance or restored vehicles where tight, precise throttle response is a priority
What you get
Minimal deflection and slop; firmer feel than nylon with good chemical resistance to fuel and oil
Full bell crank repair kit
Best for
Vehicles with heavily worn linkage where the crank itself shows scoring or damage
What you get
Includes bushing plus retaining hardware and sometimes the crank arm; restores the entire pivot assembly at once

Carburetor accelerator bell crank bushings brands we stock for your Porsche 356B

URO
1 option · from $1.95

Replacing a carburetor accelerator bell crank bushing on a Porsche 356B

Easy⏱ 30–90 minutesFlathead and Phillips screwdriversCombination wrench set or socket setSmall punch or bushing driverNeedle-nose pliers (for throttle return spring)Lithium-based or dry-film lubricant

Disconnect the throttle cable and return spring from the bell crank, then remove the retaining clip or bolt holding the crank to its pivot stud. Drive or press the old bushing out with a suitable punch, install the new bushing flush in the bore, and reassemble the linkage in reverse order. Before starting the engine, verify that the throttle opens fully with the pedal depressed and snaps back to idle without binding.

Frequently asked questions

How much does it cost to replace carburetor accelerator bell crank bushings on a Porsche 356B?
Parts start at $1.95 for a bushing on a Porsche 356B. Because the job requires removing the throttle linkage and sometimes the carburetor itself, a shop may charge one to two hours of labor on top of the part cost. Doing it yourself keeps the total close to the part price alone.
Can a worn bell crank bushing cause poor acceleration on a Porsche 356B?
Yes. A worn bushing introduces play into the throttle linkage, so the throttle plate inside the carburetor does not open as quickly or as far as the pedal input demands. The result is a noticeable hesitation or flat spot when accelerating, which is often misdiagnosed as a carburetor tuning issue rather than a mechanical linkage problem.
Is a carburetor accelerator bell crank bushing a DIY repair on a Porsche 356B?
For most people, yes. The bushing is a small press-fit or snap-fit component in the throttle linkage. Access can be tight depending on engine bay layout, but no special equipment is typically required beyond basic hand tools. The hardest part is often disconnecting and correctly reassembling the throttle return spring and cable without losing tension.
How do I know if the bushing is worn versus the bell crank itself being damaged on a Porsche 356B?
With the engine off, grasp the bell crank lever and try to wiggle it perpendicular to its rotation axis. Excessive radial play with a worn pivot hole points to a damaged crank; uniform slop that disappears when you manually center the lever typically means only the bushing is worn and the crank itself is still serviceable.
How long does a carburetor accelerator bell crank bushing last on a Porsche 356B?
Service life varies widely based on material, heat exposure, and maintenance. Nylon OE bushings on a well-maintained Porsche 356B often last many years, but they degrade faster with heat cycling, fuel vapors, or neglected lubrication. Inspecting the linkage pivot every time you service the carburetor is the best way to catch wear before it affects drivability.
Do I need to remove the carburetor to replace the bell crank bushing on a Porsche 356B?
Not always. On many Porsche 356B applications the bell crank mounts to a bracket on the intake manifold or carburetor body and can be accessed without full carburetor removal. However, if the pivot boss is integral to the carburetor body or clearance is very tight, partial disassembly of the linkage and throttle cable may be necessary to drive or press the old bushing out cleanly.

Shop carburetor accelerator bell crank bushings by year for the Porsche 356B

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