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EC Walbro Gas Fulcrum Arm Gauge
706 EC Walbro Gas Fulcrum Arm Gauge
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EC Walbro Gas Fulcrum Arm Gauge

Part Number: 706-G
Online Price: $10.00
706 Walbro Fulcrum Arm Gauge | Carb Tuning Tool for Racers
Availability: In Stock.

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Description

706 Walbro Fulcrum Arm Gauge – Gas | Precision Carburetor Tuning Tool for Racers


Set your Walbro carburetor’s fulcrum arm height with confidence using EC’s 706 Fulcrum Arm Gauge—the essential tool for precision tuning in kart racing and small engine performance.


Designed for Walbro diaphragm carburetors (WA, WB, and similar models), this two-sided billet aluminum gauge allows racers and builders to accurately measure and set the fulcrum arm height, ensuring consistent fuel delivery and optimized engine performance.


Key Features:

  • Precision Fulcrum Arm Setting Tool for Walbro WA, WB, and other diaphragm carburetors
  • Two Gauge Settings:
    • .085" – Standard factory height
    • .075" – EC Blueprinted Gas Carburetor setting
  • CNC-Machined Billet Aluminum – Durable, lightweight, and built for repeated use
  • Essential for Accurate Carburetor Tuning – Ensures correct leverage of the metering diaphragm on the inlet needle
  • Used by Racers and Builders – Ideal for both DIY engine tuners and professional race teams


Why Fulcrum Arm Height Matters:

The fulcrum arm height directly affects how much fuel passes through your carburetor. If the height is off, it can cause inconsistent fuel flow, poor throttle response, and difficult tuning. It can also impact pop-off pressure, making regular checks crucial during rebuilds—or even before each race.


When to Use This Gauge:

  • During carburetor rebuilds
  • Before race events for consistent performance
  • When tuning EC Blueprinted Gas Carburetors
  • When switching fuel types or components


Don’t leave performance to guesswork—use the EC 706 Fulcrum Arm Gauge to dial in your Walbro carburetor with race-winning accuracy.

FAQ

What does the Walbro fulcrum arm gauge do?

The gauge is used to accurately set the height of the fulcrum arm in Walbro diaphragm carburetors (WA, WB). This adjustment affects how much fuel enters the carburetor via the inlet needle, impacting both performance and tuning stability.


Why are there two settings on the EC 706 gauge?

The EC 706 Fulcrum Arm Gauge features two pre-set measurements:

  • .085" – Factory-standard height for most Walbro carburetors
  • .075" – EC’s custom height for Blueprinted Gas Carburetors, offering improved responsiveness and tuning control.


How often should I check fulcrum arm height?

It’s recommended to check and adjust fulcrum arm height during every carburetor rebuild. Competitive racers may check it before each race to ensure peak performance and prevent fuel delivery issues.


What carburetors are compatible with the EC 706 gauge?

The EC 706 is designed specifically for Walbro diaphragm carburetors, including popular WA and WB series models commonly used in kart racing, small engines, and 2-cycle performance setups.


Can fulcrum arm height affect pop-off pressure?

Yes. Changing the fulcrum arm height can slightly alter the installation height of the inlet spring, which may influence pop-off pressure. That’s why accurate measuring with a gauge is crucial.

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