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Tillotson 44-270 Idle/High Mixture Screw Packing (O-Ring)
44-270 Tillotson Idle/High Mixture Screw Packing (O-Ring)
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Tillotson 44-270 Idle/High Mixture Screw Packing (O-Ring)

Part Number: 44-270
Online Price: $1.09
44-270 Tillotson Idle/High Mixture Screw Packing (O-Ring) – OEM Seal
Availability: In Stock.

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Description

44-270 Tillotson Idle/High Mixture Screw Packing (O-Ring) – OEM Needle Seal for High & Low Adjustment Screws


The 44-270 Tillotson Packing O-Ring is a genuine OEM seal used to prevent fuel leaks around the high and low-speed adjustment needles on most Tillotson carburetors. This small but critical component ensures consistent fuel metering and prevents air intrusion or fuel seepage through the needle bores.


This O-ring fits both high and low mixture screws for the majority of Tillotson HL, HR, and similar carburetor models. However, it only fits the low-side needle on HD-series carburetors and HR models.


Note: Do not use this O-ring on the high-side needle of HD or HR carburetors—those require model-specific O-rings.


Key Features:

  • Genuine OEM Tillotson replacement part
  • Seals high and low-speed mixture screws
  • Prevents fuel leaks and maintains carburetor tuning
  • Compatible with a wide range of HL, HR, and WX models
  • Not included in OEM rebuild kits (included in EC Pro Rebuild Kits)


Maintenance Recommendation:

Replace every 8–10 races or during a complete carburetor rebuild to ensure optimal sealing and fuel control.


O-Ring Specifications:

  • Outside Diameter (O.D.): 0.285"
  • Inside Diameter (I.D.): 0.150"
  • Thickness: 0.069"
  • OEM Part Number: 44-270


Fits High & Low Side Mixture Screws on:

(Selected Models Only – Not an exhaustive list)

Fits HL-1A HL-129E,HL-132H,HL-166B&C,HL-189F,HL-227A,E,HL-229A,HL-321E,HL-232A,E, HL-250A, B, C,D,E HL-274E,HL-,292G,HL-293A,F,HL-299E,HL-304E, HL-304WX,WXA, WXG,HL-306AHL-314E,HL-314F&G, HL-324A,HL-334A,AA,B,AB, WX,WXA,WXG,HL-339A,HL-341A,HL-342A,HL-348A,B,C,D,E, HL-352A,HL-355A,B,C,D,E HL-357A,B, HL-360A, HL-360B,C HL-365A&B,HL-366A,HL-368A,HL-371A,HL-374A,HL-380A,B,HL-383A,HL-384A&B, HL-385A, HL-388A,HL-395A,HR-181B,HR-184A,HR190A,HR-191C,HR-191G,HR-196A

Always check your carburetor’s parts list or measure your existing O-ring before ordering.

FAQ

What does the 44-270 Tillotson O-Ring do?

The 44-270 is a sealing O-ring used on the high and low-speed adjustment screws to prevent fuel from leaking out of the carburetor and maintain precise tuning.


What carburetors is this O-ring compatible with?

It fits most Tillotson HL, HR, and other models. On HR and HD models, it only fits the low-speed side. Examples include:

  • HL-129E, HL-132H, HL-227A, HL-304WX
  • HR-181B, HR-191G, HR-196A (low side only)
  • WX/WXA/WXG and many more


Can I use this O-ring on both high and low mixture screws?

Yes, for most Tillotson models. However, on HR and HD models, this O-ring is only compatible with the low-side needle.


How often should I replace it?

You should replace the O-ring every 8–10 races or during a complete carburetor rebuild, especially in racing or high-performance applications.


Is this O-ring included in rebuild kits?

This O-ring is included in EC Pro Rebuild Kits but is not included in standard Tillotson OEM rebuild kits, so you may need to purchase it separately.

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