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Tillotson Main Metering Diaphragm
237-600 Tillotson Main Metering Diaphragm
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Tillotson Main Metering Diaphragm

Part Number: 237-600
Online Price: $5.31
Tillotson 237-600 Main Metering Diaphragm – OEM Replacement
Availability: In Stock.

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Description

Tillotson 237-600 Main Metering Diaphragm


The Tillotson 237-600 Main Metering Diaphragm controls the opening of the fuel inlet needle valve, allowing precise fuel flow to both the high and low fuel circuits of your carburetor.


This diaphragm features a distinctive metal “wagon wheel” reinforcement at its center. This “wagon wheel” stabilizes the diaphragm’s movement, ensuring that the dimple in the middle aligns perfectly above the tip of the fulcrum arm. As the fulcrum arm presses down, it opens the inlet valve to regulate fuel delivery smoothly through the carburetor’s high and low-speed circuits.


For optimal performance and reliability, we recommend replacing this diaphragm every 3-5 races or sooner if you notice a decline in engine performance.


Compatibility:
The 237-600 diaphragm fits a wide range of Tillotson carburetors, including all HL, HR, HW, HX, and HM models such as:
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-306A, HL-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, HR-190A, HR-191C, HR-191G, HR-196A, HW-10A,B, HW-11A,B, HW-22A, HW-23A, HW-27A, HW-30A, HW-31A, HW-32A, HW-33A, HW-34A, HW-35A, HW-43A, HB-10A, HB-11A, HB-12A, HC-102A, HC-103A, HC-112A, HM-1A, HM-2A, HM-12A, HX-10A, HX-12A.


Important:
This diaphragm is NOT compatible with HD model Tillotson carburetors.

FAQ

Q: What does the Tillotson 237-600 Main Metering Diaphragm do?
A: It controls the fuel inlet needle valve, regulating fuel flow to the carburetor’s high and low-speed circuits.

Q: How often should I replace this diaphragm?
A: For best performance, replace it every 3-5 races or whenever you notice a drop in engine performance.

Q: Will this diaphragm fit my Tillotson carburetor?
A: It fits all HL, HR, HW, HX, and HM models, but it is not compatible with HD model carburetors.

Q: What is the “wagon wheel” feature mentioned in the description?
A: It’s a metal reinforcement in the diaphragm center that stabilizes its movement for precise fuel control.

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