1996-2005 Suzuki DF40, DF50 Four Stroke Outboard Service Manual, Page 449Get this manual
DF4050 "K5" ('05) MODEL
Item FUELOIL
Data DF40T DF40QH DF50T DF50TH
Suzuki highly recommends that you use alcohol-free unleaded gasoline with minimum pump octane rating of 87 ((R+M)2 method) or 91 (Research method)However, blends of unleaded gasoline and alcohol with equivalent octane content may be usedAPI classification SE, SF, SG, SH, SJ Viscosity rating SAE 10W-40 (USlmpqt) 2.2 (2.31.9)Oil change only 2.4 (2.52.1)Oil filter change SUZUKI Outboard Motor Gear Oil (SAE #90 hypoid gear oil) ml (USlmpoz) 610 (20.621.5)
Engine oil Engine oil amounts Gear oil Gearcase oil amounts