OMC 3744043AE Stringer GM V6 V8 3.8L 4.3L 5.0L 5.7L Crankshaft Pulley 1976-1986 Upper Unit Works on 1981-1983 120

Works on 1981-1983 120

165 GM 250 I/L 6 1970-1978

if yours is shorter it's not anything to be concerned with as there was only 2 types of these tubes (Inline engines type & V-engines type)

Part Number 983967 / 0983967 For Plastic Water Pump Impeller Housing Cover

1972 1973 1

OMC 3744043AE Stringer GM V6 V8 3.8L 4.3L 5.0L 5.7L Crankshaft Pulley 1976-1986 Upper Unit Works on 1981-1983 120Item Details Freshwater Used Part Cleaned & Repainted (Equivalent of Blue (early stringer) and Silver (Stringer) models, and early Cobra models (Gray). Pulley is straight and not warped. Widely used in many OMC V6 & V8 applications 1979 1986 1987 1993 Used 315781 3852137 Which was usually stamped 315781 and is physically different. (These earlier ones are shorter overall) 2 double v groove slot pulley Just check the part number on the pulley you are