The Tillotson Main Metering Diaphragm Gasket designed for the Tillotson fuel pump stock of HB, HL, HR, HW, HM, and HX Model Carburetors
The Tillotson main metering diaphragm gaske1t goes on top of the Tillotson carburetor body before the main metering diaphragm. If the gasket is above the diaphragm, it can cause tuning problems and hurt the performance of your carburetor. It will also increase wear and possible fuel pump leaks.
We recommend using a mineral oil like marvel's mystery lightly on the surface of the gasket to prevent the gasket from sticking to the carburetor body or tearing when replacing the main metering diaphragm or rebuilding the carburetor. The main metering gasket can often be reused during a rebuild but we recommend to replace it after every 3-5 races with the main metering diaphragm.
6B-217 OE Tillotson Metering/Main Diaphragm Gasket fits all HL, HR, HW, HX, HM Models 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, HW-10A, HW-11A, HW-12A, HW-17A, HW-22A, HW-23A, HC-102A, HC-103A, HM-1A
This does not fit the HD Tillotson Carburetors