1998 Johnson Evinrude "EC" 9.9 thru 30 HP 2-Cylinder Outboards Service Manual, Page 34Get 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 OMC 2+4fuel conditioner, following directions on the bottle
Use flushing attachment if you operate the engine on trailer or dolly to prevent engine or water pump damagepropeller before starting engine to prevent accidental contact with moving propeller
& When using flushing attachment, always remove engine's
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 fuel3Prepare an engine "storage mixture" in shop V6 six-gallon tankThe mixture should include: Five gallons of fuel Two quarts of OMC Storage Fogging Oil One pint of Evinrude or Johnson Outboard Lubricant 2112 ozof OMC 2+4 fuel conditioner 4Connect the tank containing the "storage mixture" to the engineLeave the oil supply hose connected to the engineRun the engine on the "storage mixture" at approximately 1500 RPM for five minutes5Stop engine and remove all spark plugsSpray liberal amount of OMC Storage Fogging Oil into the spark plug holes6Turn flywheel in clockwise direction to distribute the fogging oil throughout the cylindersInstall and torque the spark plugs