1996-2005 Suzuki DF40, DF50 Four Stroke Outboard Service Manual, Page 8Get this manual
1-3 GENERAL INFORMATION
IDENTIFICATION NUMBER LOCATION
MODEL PRE-FIX SERIAL NUMBER The MODEL, PRE-FIX and SERIAL NUMBER of motor are stamped on plate attached to the clamp bracketExample
DF 50 05001FXXXXXX
SERIAL NUMBER