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EC HL-304WX-18K Dominator Tillotson for Animal Snowmobile Gas Carburetor Kit
HL-304WX-18K Snowmobile Gas Dominator Plus Kit for Animal Engine
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EC HL-304WX-18K Dominator Tillotson for Animal Snowmobile Gas Carburetor Kit

Part Number: HL304WX-18K
Online Price: $415.99
HL-304WX-18K Tillotson Dominator Carburetor Kit for Snowmobile Racing
Availability: In Stock.

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Description

HL-304WX-18K Dominator Tillotson Carburetor Kit for Briggs & Stratton Animal – Snowmobile Racing Gas Setup


The EC Dominator HL-304WX-18K is precision-engineered and blueprinted specifically for Briggs & Stratton Animal (Model 12) engines used in competitive snowmobile racing. While the HL-304WX-18 and HL-304WX-19 carburetors share a similar base, the 18K version is tuned uniquely for the demands of snowmobile competition, where throttle response, cold-weather consistency, and peak top-end power are critical.


Proven Dominance in Power and Precision

Our EC Dominator Series has earned its name by consistently setting records, winning national championships, and pushing performance boundaries for decades. Each Dominator carburetor is hand-built by expert technicians who apply racing-proven knowledge, precision calibration, and advanced modifications that go far beyond stock diaphragm carburetors.


EC engineers were the first to develop 4-cycle Tillotson carbs featuring the revolutionary infinite-radius venturi design, which dramatically improves airflow, enhances fuel atomization, and strengthens throttle signal. The result is a smoother, faster, and more responsive carburetor — race after race.


Key Features of the HL-304WX-18K Snowmobile Dominator

Each Dominator is hand-tuned using dozens of proprietary procedures. Some highlights include:

Permanently Mounted Velocity Stack – Machine-matched to the carburetor body for seamless airflow
Polished & Ported Body – Mirror-finished internals reduce turbulence and improve flow
Aligned & Polished Throttle Shaft – Precision fitted for reduced drag and smooth operation
Custom “Trix” Throttle Shaft Screw – Hand-made for consistency and reliability under race stress
High-Performance Fuel Circuit Calibration – Optimized for snowmobile fuel demand and rapid acceleration


Kit Includes:

  • CNC-Machined Intake Manifold
  • Walbro Round-Style Fuel Pump (FPC-1 or TFPC-1)
  • Inline Fuel Filter
  • Linkage Kit (ready to install)


Fuel Requirements:

  • Approved Fuels: Pump gas or race gasoline
  • Do Not Use: E85, E91, or any ethanol blends
  • Note: Oxygenated fuels may alter required needle settings


Carburetor Specifications:

  • Bore: 1.000” (25.4 mm)
  • Venturi: 0.900” (22.86 mm)


Initial Needle Settings (Baseline Tuning):

  • High Speed (H) Needle: 1 turn out
  • Low Speed (L) Needle: 2.5 turns out
    (Adjust based on altitude, temperature, and engine responsiveness.)


Fuel Pump Compatibility Warning:

This carburetor requires a Walbro FPC-1 or TFPC-1 round-style fuel pump. The following pumps are not supported and may cause tuning issues or damage:

Briggs & Stratton Square Pump
Mikuni or Mikuni Knock-Offs
Plastic Walbro WIP Clones
Electric Fuel Pumps

Need help choosing the right pump? Contact us before ordering.

FAQ

What is the HL-304WX-18K Dominator Carburetor Kit used for?

This kit is built specifically for racing snowmobiles using modified Briggs & Stratton Animal (Model 12) engines. It's tuned for gas fuel and optimized for cold-weather high-performance.


What makes the 18K different from the 19K?

While both share the same base carburetor (HL-304WX), the 18K is blueprinted specifically for snowmobile applications and tailored for colder environments and longer throttle engagement.


What fuel should I use?

Only use pure pump gas or race gasoline. Do not use ethanol blends like E85 or E91, and avoid adding top lube or other fuel modifiers.


Which fuel pumps are compatible?

Use only the Walbro FPC-1 or TFPC-1 round-style fuel pumps. Do not use square pumps, electric pumps, or knock-offs like Mikuni clones.


Can I run this carb on a kart or non-snowmobile setup?

This model is tuned specifically for snowmobiles, but the HL-304WX-19K is a better choice for karts and other gas-based flat track or oval racing setups.


Is tuning required after installation?

Yes. Initial settings are:

  • High needle: 1 turn out
  • Low needle: 2.5 turns out
    You may need to adjust based on weather, fuel type, and elevation.

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