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Tillotson RK-117HL OEM Single Stack Rebuild Kit
RK-117HL OEM Tillotson Single Stack Rebuild Kit
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Tillotson RK-117HL OEM Single Stack Rebuild Kit

Part Number: RK-117HL
Online Price: $18.99
Tillotson RK-117HL OEM Rebuild Kit – HL-Series Standard Volume
Availability: In Stock.

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Description

Tillotson RK-117HL OEM Rebuild Kit for HL-Series Standard Volume (Single Stack) Carburetors


The Tillotson RK-117HL Rebuild Kit is a genuine OEM service kit designed for Tillotson standard volume, single-stack fuel pump carburetors, commonly used in high-performance 2-cycle engines. It contains all the essential parts needed to restore fuel delivery and functionality—without the risks of generic or aftermarket alternatives.


Why Choose RK-117HL for Your Carburetor?

Standard Volume Pump Stack Compatibility

This kit is built specifically for standard volume (single-stack) Tillotson carburetors. These units use two aluminum plates in the pump stack (versus three in high-volume “double stack” or “alky” plates). Gaskets and diaphragms between these types are not interchangeable—so matching the plate design is critical.


High-Quality “Snakeskin” Pump Diaphragm

Includes a .006" laminated fuel pump diaphragm, known for its strength, flexibility, and fuel resistance. It is ideal for mid-to-large displacement 2-cycle engines. Thinner (.004") diaphragms are more common on small-displacement engines—always check your carb model for compatibility.


Precision Fuel Inlet Needle & Seat

Comes with a captured-style fulcrum arm and needle, where the forked arm “locks” onto the needle. The .093” short seat supports higher fuel flow, ideal for performance applications. Smaller seats (.062”) can cause fuel starvation under load.


Correct Gasket Thickness

This kit includes a .020" diaphragm gasket, standard for most HL-series carbs. Some racing applications may require thicker gaskets (.040")—consult your engine builder or carb spec sheet for exact requirements.


OEM Superiority

Tillotson OEM components offer superior material quality, fuel resistance, and sealing performance compared to off-brand or universal kits. Perfect for racing, long-running events, or any high-reliability use.


Kit Contents

  • Main Diaphragm
  • Main Diaphragm Gasket
  • .006” Fuel Pump Diaphragm
  • .020” Fuel Pump Diaphragm Gasket
  • 1.00” Flange Gasket
  • Inlet Fuel Cap Gasket
  • Captured Needle
  • Captured Fulcrum Arm
  • Short Fuel Inlet Seat (.093” bore, 0.530” length)
  • Seat Gasket
  • .500” Welch Plug
  • .375” Welch Plug


Compatible With These Tillotson Carburetors:

  • HL-227A
  • HL-232
  • HL-250A–E
  • HL-304E
  • HL-306A
  • HL-334A, AB, AA (IAME Leopard)
  • HL-360A
  • HL-365B
  • HL-383A
  • HL-384A & B
  • HL-385A


Looking for Enhanced Performance?

Try the P11-RK EC Pro Kit as a high-performance replacement for RK-117HL, or the P3-RK EC Pro Kit for greater fuel control and flow advantages. Always check your carb’s exact model and your racing rulebook before upgrading.

FAQ

Q1: What carburetors does the RK-117HL kit fit?

This kit is designed for Tillotson HL-series carburetors with standard volume (single stack) fuel pump plates, such as HL-227A, HL-304E, HL-334AA (Leopard), HL-360A, and others. Check the product description for a full compatibility list.


Q2: How do I know if I have a standard volume or high volume pump plate?

Standard volume plates use two aluminum plates (single stack), while high volume plates use three plates (double stack or “alky” plate). The gaskets and diaphragms are not interchangeable between the two types.


Q3: What’s special about the fuel pump diaphragm in this kit?

It includes a .006” laminated “snakeskin” diaphragm, offering strength and responsiveness, ideal for most HL carb applications. It ensures consistent fuel delivery even under demanding racing conditions.


Q4: Does this rebuild kit include the inlet needle and seat?

Yes. It includes a captured-style inlet needle and fulcrum arm, along with a short inlet seat with a .093” bore—ideal for higher fuel flow requirements.


Q5: Can I use this kit for methanol-tuned or racing carburetors?

Not recommended. Methanol and high-performance applications usually use high-volume (three plate) pump stacks, which require the DG4-HLR kit or EC’s P8-MRK Pro Kit.


Q6: What if I need additional performance or racing-grade components?

EC offers Pro Kits like the P11-RK (direct replacement for RK-113HL) and P3-RK, which include upgrades suitable for competitive performance environments.

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