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EC P5-RK Pro Rebuild Kit for Standard Volume(Single Stack, Gas)Carburetors
P5-RK EC Pro Rebuild Kit for Single Stack Gas Tillotson (Captured)
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EC P5-RK Pro Rebuild Kit for Standard Volume(Single Stack, Gas)Carburetors

Part Number: P5-RK
Online Price: $18.99
EC P5-RK Pro Rebuild Kit – Standard Volume(Single Stack) Gas Carburetors
Availability: In Stock.

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Description

EC P5-RK Pro Rebuild Kit for Standard Volume (Single Stack, Gas) Tillotson Carburetors


The EC P5-RK Pro Rebuild Kit is purpose-built for professional tuners and competitive racers who demand precision and performance from their standard volume (single stack, gas) Tillotson-style carburetors.


Unlike most OE and aftermarket kits, the EC Pro Gasket Kits are designed with a race-first mindset. We source only high-quality OE parts or superior aftermarket components that withstand the extreme demands of gas-powered 2-cycle and 4-cycle racing engines. Our kits eliminate cost-cutting compromises and instead focus on delivering consistent fuel delivery, optimal throttle response, and long-term reliability.


Why Choose the EC P5-RK Pro Kit?

Includes Hard-to-Find Components

This rebuild kit contains more than the typical essentials. You’ll find often-missing components such as the brass fuel strainer screen, copper seat gasket, and cork fuel screen gasket, ensuring a complete and thorough rebuild.


Exclusive Carburetor Diagram Included

Each EC Pro Kit comes with a detailed parts diagram of the Tillotson carburetor—something not provided in OE or aftermarket alternatives. This visual breakdown helps DIY racers and mechanics confidently identify parts and reassemble correctly every time.


Performance-Focused Upgrades

The kit includes our proprietary ‘Fast Action’ Main Diaphragm, engineered for quicker throttle response and smoother operation. With a refined metal finish and precise dowel height control, this diaphragm offers a clear advantage over standard and even OE designs.

Additionally, the 0.040” high-volume fuel pump diaphragm gasket boosts fuel delivery—an essential upgrade for gas-powered racing applications.


Gas Engine Compatibility

This version of the kit features the short gas seat with a .062” orifice, ideal for:

  • Piston port 2-cycle engines
  • Small block 4-cycle engines

Note: This is the only difference between the P5-RK and the P3-RK kits. Please confirm your carburetor specs before ordering.


Captured Fulcrum Design

The kit includes a captured-style fulcrum arm and inlet needle, where the forked arm captures the dowel on the needle's head. This design maintains positive contact under vibration or vertical carburetor orientation—especially useful when the fuel pump stack faces downward.


Kit Contents

  • Fast Action Main Diaphragm
  • High Volume 0.040” Fuel Pump Diaphragm Gasket
  • 0.006” Fuel Pump Diaphragm
  • Captured Viton Inlet Needle
  • Captured Fulcrum Arm
  • .062” ID Short Gas Seat (0.500” overall length)
  • Brass Fuel Strainer Screen
  • Fuel Screen Cork Gasket
  • Copper Seat Gasket
  • High/Low Side Mixture O-Rings
  • 1.00” Flange Gasket
  • 1.060” Flange Gasket
  • 0.375” Welch Plug
  • 0.1875” Cup Plug


OEM Replacement Compatibility

This rebuild kit is compatible with any standard volume (single stack, gas) Tillotson pump stack carburetor that uses:

  • A .062” gas seat
  • A captured fulcrum arm and inlet needle

It replaces the Tillotson DG-series kits and more.

FAQ

Q1: What carburetors is the EC P5-RK compatible with?
A: The kit fits standard volume (single stack, gas) Tillotson-style carburetors that use a .062 gas seat and captured-style fulcrum arm and inlet needle.


Q2: What’s the difference between the P5-RK and P3-RK kits?
A: The only difference is the seat. The P5-RK includes a .062 gas seat, while the P3-RK includes a larger .093 alky seat for methanol-fueled applications.


Q3: Does the kit include a rebuild diagram?
A: Yes! Each Pro Kit comes with an exclusive diagram of the carburetor and parts breakdown for easier and more accurate reassembly.


Q4: What engines is this kit best suited for?
A: This kit is ideal for 2-cycle piston port engines and small block 4-cycle gas engines commonly used in kart racing.


Q5: What is a captured needle and why does it matter?
A: A captured needle uses a forked fulcrum arm to hold the needle’s dowel in place, ensuring better stability in vertical carburetor setups and during high-vibration racing conditions.

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