The Sierra 18-15460 V-Belt is interchangeable with the following: Evinrude/Johnson 909971, Mallory 9-55002, Mercruiser 57-48120, 57-48120A1, 57-48120Q1, OMC 310953, 909971, Volvo Penta 950818, 829207. Each Sierra product meets or exceeds the original equipment part it replaces. Sierra V-Belt Effective length: 46", Top Width: 29-64" Sierra part number: 18-15460 Interchangeable with the following: Evinrude/Johnson 909971, Mallory 9-55002, Mercruiser 57-48120, 57-48120A1, 57-48120Q1, OMC 310953, 909971, Volvo Penta 950818, 829207