The Tillotson Fulcrum arm lifts the fuel inlet needle to allow fuel to enter the high and low side fuel circuits. That means the fulcrum arm can have an impact on the fuel flow and tune of the carburetor.
Fulcrum Arm Height is the measurement between the carburetor gasket surface to the tip of the fulcrum arm.
• Factory Fulcrum Arm Height is typically set at .085".
• For most gas carburetors, we set the fulcrum at .075" using our 705 EC Tillotson Gas Fulcrum Arm Gauge
• For most methanol carburetors, we set the fulcrum at .065" using our 704 EC Tillotson Gas Fulcrum Arm Gauge
The 155A-27 OE Tillotson Inlet Control Lever/Fulcrum Arm is "captured." Tillotson Captured Fulcrum arm differs from uncaptured fulcrum arm by capturing the dowel on the needle valve with the forked end of the fulcrum arm.
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-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,HR190A,HR-191C,HR-191G,HR-196A,HW-10A,B HW-11A,B, HW-12A, HW-17A, HW-19A, 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-103A,HC-112A, HM-1A, HM-2A, HM-12A, HX-10A, HX-12A