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EC P11-RK Pro Rebuild Kit for Standard Volume(Single Stack, Gas)Carburetors
P11-RK EC Pro Single Stack HL Rebuild Kit (Captured)
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EC P11-RK Pro Rebuild Kit for Standard Volume(Single Stack, Gas)Carburetors

Part Number: P11-RK
Online Price: $18.99
EC P11-RK Pro Rebuild Kit for Standard Volume Gas Carburetors
Availability: In Stock.

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Description

EC P11-RK Pro Rebuild Kit for Standard Volume (Single Stack) Carburetors


High-Performance Rebuild Kit for Racing Tillotson-Style Carburetors

The EC P11-RK Pro Rebuild Kit is expertly engineered for racers and small engine professionals using standard volume (single stack, gas) Tillotson-style carburetors. Designed to meet the demanding needs of high-performance karting and small engine racing, this kit includes upgraded components for durability, precision, and performance under race conditions.


Unlike generic rebuild kits that prioritize price over quality, our EC Pro Gasket Kits are built using OE parts or premium aftermarket components—ensuring superior reliability and consistent performance lap after lap.


Key Features & Benefits:

  • Fast Action Main Diaphragm
    Engineered for racing performance, this upgraded main diaphragm delivers improved throttle response, better metering, and faster fuel reaction. The unique “wagon wheel” center offers a smoother finish and more consistent fulcrum height adjustment.
  • .093" Short Alky Fuel Seat
    This short fuel inlet seat with a .093” orifice and cross-hole design is commonly used in rotary-valve or reed-valve 2-cycle engines, larger displacement piston port 2-cycles, and larger 4-stroke gas engines. It's also suitable for methanol applications, depending on engine setup.
  • .020" Fuel Pump Diaphragm Gasket
    Standard for most Tillotson carburetors, the .020" gasket holds less fuel volume and is often required by karting class rules. If allowed, racers may opt for the P3-RK kit with a high-volume .040" gasket.
  • Captured Inlet Needle & Fulcrum Arm
    The needle valve and fulcrum are “captured” for consistent contact and control—especially useful in carburetors mounted with the pump stack downward.
  • Exclusive Parts Diagram Included
    Each EC Pro Kit includes a detailed parts diagram and component breakdown—not found in OE or aftermarket kits. This helps DIY racers rebuild their carburetors correctly and confidently.


Kit Contents:

  • Fast Action Main Diaphragm
  • .020" Fuel Pump Gasket
  • .006" Fuel Pump Diaphragm
  • .375" Welch Plug
  • 1.00" Flange Gasket
  • Captured Viton Inlet Needle
  • Captured Fulcrum Arm
  • Copper Inlet Seat Gasket
  • .093" ID Short Alky Seat w/ Cross-Hole (0.532" Length)
  • Brass Fuel Strainer Screen
  • Fuel Screen Cork Gasket
  • High/Low Side Mixture O-Rings


Compatibility:

The EC P11-RK is compatible with any Standard Volume (Single Stack, Gas) Tillotson-style carburetor that uses a .093" inlet seat and a captured fulcrum arm & needle — including models like Tillotson HL-383A.


Direct replacement for Tillotson RK-117HL


Why Choose EC Pro Kits?

EC Pro Gasket Kits are made for racers by racers. Whether you're a competitive kart driver or a high-performance engine builder, our kits provide the parts, precision, and performance you need—plus the documentation to do it right the first time.

FAQ

1. What carburetors are compatible with the EC P11-RK?

This kit is compatible with Standard Volume (Single Stack, Gas) Tillotson-style carburetors that use a .093” short seat with cross-hole, captured fulcrum arm, and inlet needle. Compatible models include HL-383A and others using RK-117HL.


2. What's the difference between the P11-RK and P12-RK kits?

The main difference is the fuel inlet seat size:

  • P11-RK uses a .093" seat (short alky seat)
  • P12-RK uses a .062" seat (short gas seat)
    Choose based on your engine type and fuel system requirements.


3. Does this kit support methanol or just gasoline engines?

Although often called an "alky seat," the .093” seat is also used in gasoline engines, especially in rotary-valve 2-cycles, larger piston-port engines, and 4-stroke gas engines. It’s not limited to methanol use.


4. What’s special about the Fast Action Main Diaphragm?

The Fast Action Diaphragm is a high-performance upgrade that improves throttle response and metering accuracy. It features a "wagon wheel" design for consistent fulcrum height and smoother operation than OE or standard aftermarket diaphragms.


5. What is a captured needle and fulcrum arm?

A captured needle means the fulcrum arm "captures" the dowel on the needle head. This design keeps the arm in constant contact with the needle—ideal for carburetors with the fuel pump stack facing downward. It enhances stability and consistent fuel delivery.


6. Does this kit include a parts diagram or instructions?

Yes! All EC Pro Kits include a detailed parts breakdown diagram, showing the internal assembly order and part identification. This makes DIY rebuilding easier and more reliable—something no other OE or aftermarket kits provide.


7. Which Tillotson kit does the EC P11-RK replace?

The EC P11-RK is a direct replacement for the Tillotson RK-117HL rebuild kit—offering enhanced performance and added installation support for racers.

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