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EC LK-128 Tillotson 3-Phase Arm Linkage
LK-128 EC Tillotson 3-Phase Arm Linkage
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EC LK-128 Tillotson 3-Phase Arm Linkage

Part Number: LK-128
Online Price: $9.95
EC LK-128 3-Phase Arm Linkage for Tillotson HL Carburetors
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Description

EC LK-128 Tillotson 3-Phase Arm Linkage – Adjustable Throttle Throw Adapter for HL Carburetors


Enhance Throttle Control with Adjustable 3-Phase Throw

The EC LK-128 3-Phase Arm Linkage is a precision-engineered throttle arm adapter designed to increase throttle throw and fine-tune throttle response on Tillotson HL carburetors. This component is ideal for Briggs Flathead and other small engines that require refined throttle modulation, especially in racing applications.


Purpose-Built for HL Carburetors with Throttle Stop on Needle Side

Designed specifically for Tillotson HL carburetors with the throttle stop on the needle side, the 3-phase arm mounts directly to the throttle shaft on the needle side of the carb. This configuration avoids interference with the exhaust header, making it a preferred setup for race karts and small engines with compact or heat-sensitive layouts.


Key Features:

  • Increases throttle throw for smoother, more controlled response
  • Designed for Tillotson HL carburetors with throttle stop on the needle side
  • Prevents interference with exhaust headers by mounting on the opposite side
  • Three adjustable cable attachment points for tuning throttle range and sensitivity
  • Commonly used on Briggs Flathead and similar kart racing engines
  • Standard component on the HL-360D Limited Modified Dominator carburetor


Installation Notes:

  • Requires tapping the stock throttle shaft lever to 5-40 thread size (tap not included)
  • Professional installation recommended
  • Compatible with throttle cables using a spring or clevis for attachment


Perfect for Kart Racers & Engine Builders

Whether you're running a Flathead Limited, a Tillotson HL-based performance carb, or building a custom setup, the EC LK-128 3-Phase Arm Linkage gives you the adjustability and clearance needed for reliable, race-winning throttle control.

FAQ

1. What does the 3-phase arm do?

The 3-phase arm increases the length of the throttle throw, giving you more precise throttle control. It features three cable attachment holes to adjust throttle range and response.


2. What carburetors is the EC LK-128 compatible with?

It’s designed for Tillotson HL carburetors that have the throttle stop on the needle side. This placement avoids interference with the exhaust header and is especially useful in tight engine bays.


3. What engines typically use this linkage?

The arm is commonly used on Briggs Flathead engines, particularly in kart racing applications. It’s a standard part on the EC HL-360D Limited Modified Dominator carburetor.


4. Is the installation beginner-friendly?

No. Installation requires tapping the stock throttle shaft lever to 5-40 thread size. This is a precision task, so professional installation is recommended.


5. Can I use a clevis or spring for throttle cable attachment?

Yes. The 3-phase arm is compatible with both spring loops and clevis fittings, offering flexibility for different throttle cable setups.



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