1997 Johnson Evinrude "EU" 40 thru 55 2-Cylinder Service Manual, P/N 507265, 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, following directions on the bottle
INote Use flushing attachment if you operate the engine on a
trailer or dolly to prevent engine or water pump damage
11 When 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 fuel3Prepare an engine "storage mixture" in shop V6 six gallon tank, PI 397767The mixture should include: Five gallons of fuel Two quarts of OMC Storage Fogging Oil One pint of Johnson or Evinrude Outboard Lubricant 2112 ozof OMC 2+4 fuel conditioner 4Connect the tank containing the "storage mixture" to the engineLeave the oil supply hose line connected to the engineRun the engine on the "storage mixture" at approximately 1500 RPM for five minutes