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EC Tillotson Fulcrum Arm Kit – Gas
716 EC Tillotson Gas Service Kit
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EC Tillotson Fulcrum Arm Kit – Gas

Part Number: 716
Online Price: $28.27
716 EC Tillotson Fulcrum Arm Kit – Gasoline Carburetor Tuning Kit
Availability: Out of Stock.

Description

716 EC Tillotson Fulcrum Arm Kit – Gas | Complete Tool Kit for Fulcrum Height & Inlet Seat Service


Accurately service your Tillotson diaphragm carburetor with the EC 716 Fulcrum Arm Kit – designed specifically for gas-powered applications. This all-in-one kit gives you the precision tools needed to measure fulcrum arm height and replace the fuel inlet seat without damaging the carburetor body or components.


Ideal for kart racers, engine builders, and performance tuners, this kit ensures consistent fuel delivery and optimal carburetor performance every time.


Kit Includes:

705 EC Gas Fulcrum Arm Gauge (Tillotson)

  • Easily measure and adjust the fulcrum arm height in Tillotson diaphragm carburetors
  • Controls how much leverage the metering diaphragm has on the fuel inlet needle
  • Directly affects fuel flow to the high and low circuits, as well as pop-off pressure
  • EC sets most gas carburetors using the .075” side of the gauge for balanced tuning


718 Dowel Pin (.125" x 2") – Alignment Tool

  • Used on older Tillotson carburetors that do not self-align the copper inlet seat gasket
  • Works in combination with the 36A-38M machined inlet seat
  • Ensures accurate alignment of the copper seat gasket during reassembly


36A-38M Machined Inlet Seat (Short, Modified)

  • Not a functioning fuel inlet seat
  • Purpose-built alignment tool for use with the 718 dowel pin
  • Allows precise gasket alignment—do not use in a running carburetor, as it will cause flooding


711 Machined Seat Socket Tool

  • Custom-machined to fit Tillotson fuel inlet seats perfectly
  • Enables safe removal and installation of the inlet seat without damaging the carb body
  • Essential for rebuilds—standard sockets often cause seat or body damage


Designed For:

  • Tillotson diaphragm carburetors (gasoline-fueled)
  • Routine rebuilds and performance tuning
  • Kart racing, small engine tuning, and 2-cycle performance applications
  • Both modern and older Tillotson models (including non-self-aligning versions)


The EC 716 Fulcrum Arm Kit is the go-to solution for rebuilding and tuning gas Tillotson carbs with accuracy and confidence. Don't risk damaging your carb—use the right tools every time.

FAQ

What does the 716 EC Fulcrum Arm Kit include?

The kit includes:

  • 705 EC Fulcrum Arm Gauge (.075")
  • 718 Alignment Dowel Pin
  • 36A-38M Machined Inlet Seat (for alignment only)
  • 711 Machined Seat Socket Tool
    All tools are designed for use with Tillotson diaphragm carburetors running on gasoline.


Why is fulcrum arm height important in carb tuning?

Fulcrum arm height affects the leverage of the metering diaphragm on the inlet needle, which controls fuel flow and can influence pop-off pressure. Precise measurement is critical for consistent performance and reliable tuning.


Can I use the 36A-38M inlet seat in a running carburetor?

No. It is a non-functioning, machined alignment tool used only for correctly positioning the copper inlet seat gasket. Using it in an operational carb will cause severe flooding.


What does the dowel pin do?

The .125” x 2” dowel pin is used on older Tillotson carburetors that lack a self-aligning seat gasket design. It works in conjunction with the 36A-38M seat to align the copper gasket during installation.


Why do I need the machined seat socket?

The 711 Machined Seat Socket allows for proper removal and installation of the fuel inlet seat without damaging the carburetor body. Standard sockets may not fit correctly and can strip or deform the seat.

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