1991 Johnson/Evinrude Models "EI" 40 thru 55 Service Manual, Page 34Get this manual
Off-Season Storage Use the following procedure to properly prepare Johnson and Evinrude outboards for extended periods of nonuseThese steps are intended to protect the engine during storage and simplify the preseason servicing procedure1Stabilize the engine's fuel supply with OMC 2+4 fuel conditioner Add one ounce of OMC 2+4 fuel conditioner for every gallon of gasoline
INote trailerflushing to prevent engine oroperate pumpengine on Use attachment if you the or dolly water damageengine's propeller before starting engine to prevent accidental contact with moving propeller
J:When using flushing attachment, always remove
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 tank PIN 397767The mixture should include:
Five Two One One
gallons of fuel quarts of OMC Storage Fogging Oil pint Johnson or Evinrude Outboard Lubricant pint OMC 2+4 fuel conditioner