1996-2005 Suzuki DF40, DF50 Four Stroke Outboard Service Manual, Page 352Get this manual

1996-2005 Suzuki DF40, DF50 Four Stroke Outboard Service Manual, Page 352

DF40DF50 "K1" (01) model 13-16
FUEL MIXTURE CHECK (O2 FEEDBACK)
Perform every years
Before performing fuel mixture check (O2 feedback), the outboard motor must be checked to be sure that it is free of any trouble codes or operational problems
NOTE: See "O2 FEEDBACK SYSTEM" section on page 3-32 before starting O2 feedback operationTo perform the O2 feedback, use the SDS software with personal computer