1998 Johnson Evinrude EC 5 thru 15 HP Four Stroke Service Manual, Page 35Get this manual
Off-Season Storage Use the following procedure to properly prepare Johnson and Evinrude outboards for extended periods of non-useThese steps are intended to protect the engine during storage and simplify the preseason servicing procedure1Stabilize the engine's fuel supply with OIVIC 2+4fuel conditionerAdd one ounce ofOMC 2+4fuel conditioner for every gallon of gasoline
INote Use flushing attachment if you operate the engine on a
trailer or dolly to prevent engine or water pump damageWhen using flushing attachment, always remove engine's propeller before starting engine to prevent accidental contact with moving propeller
2Run the engine at approximately 1500 RPM for five minutes to ensure that the entire fuel supply system and the engine's carburetors are full of stabilized fuel3Clean internal engine components by spraying OIVIC Engine Tuner into the carburetor's air intakeRun the engine as directed to clear the tuner4Shut off the engineDrain the crankcase and refill with new Evinrudel Johnson Ultra 4-Stroke Crankcase OilReplace the oil filter5Following directions on canfog the engine by spraying OIVIC Storage Fogging Oil into the carburetor's air intake6Stop engine and remove all spark plugsSpray liberal amount of OMC Storage Fogging Oil into the spark plug holes7Turn flywheel in clockwise direction to distribute the fogging oil throughout the cylindersInstall and torque the spark plugs