Suzuki 50-85HP outboard motors Service Manual, Page 23Get this manual
Suzuki DT75DT85 caseSuzuki Outboard Motor Gear Oil or SAE 90 hypoid outboard gear oil should be usedGearcase capadtyis proximately 700 mL (23.7 oz of gear oil and should be drained and refmed af ter the first 10 hours of use and then af ter every 50 hours of useReinstall vent and fill plugsecurelyusing new gas ket if needed, to ensure watertight seal
OUTBOARD MOTOR
Idle spd change per each position of switch