Exhaust by propeller and 13 splinesDT 35C..................................1983-1998DT 40 ...................................1983-1998DF 40 4-TEMPS ......................1999-2010DF 40A 4-TEMPS ....................2010 and afterDT 50 &, 50M ........................ 1983-1984DF 50 4-TEMP................... .... 1999-2010DF 50A 4-TEMP ..................... 2010 and laterDT 55................................... 1985-1997DT 60................................... 1983-1984DF 60A 4-TEMP.................... 2010 and laterDT 65................................... 1985-1997