40 Series Torque Converter Driven, 7/8" Bore Specifications: Driven clutch bore: 7/8" Key Way: 3/16" Outside Diameter: 7-1/2" Belt: Symmetrical type Engagement range: 1600 - 3300 RPM The unit replaces: Replacement for 209139, 209139A Applications: This 40 series torque converter driven clutch is a symmetrical inline small engine clutch It works with 8 - 18HP engines The 40 series is heavily used in three wheelers, ATV's, LTV's, go karts, and other transportation vehicles Commercial uses include oil well pumps, tractors, tillers, lawnmowers, construction, and industrial equipment This torque converter fits 8 - 18hp engines with the following jack shafts and 3/16" keyway Clutch, 7-1/2" dia, 7/8" Bore, 3/16" key - Replaces 209139, 209139A