1998 Johnson Evinrude "EC" 25, 35 HP 3-Cylinder Outboards Service Repair Manual P/N 520205, Page 21Get this manual
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FuelOil Mixing Instructions INotel used if engine's oil mixing unit is not desired &
18 Gallons (68,1 Litres) 24 fl oz(708 !)
48 fl oz(1419 ml) 96 fl oz(2838 ml)