1999 "EE" Evinrude 200, 225 V6 FFI Outboards Service Manual, P/N 787025, Page 34Get this manual
Storage Use the following procedure to properly prepare Evinrude FFI 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+4 fuel conditioner, following directions on the bottleWhen using flushing attachment, always remove engine's propeller before starting engine to prevent accidental contact with moving propeller&
Use flushing attachment if you operate the engine on trailer or dolly to prevent engine or water pump damage
2In shop V6 six-gallon gas tank, prepare an engine "storage mixture" consisting of:
Five gallons of fuel Two quarts of OMC Storage Fogging Oil 2112 ozof OMC 2+4 fuel conditioner 3Connect the tank containing the "storage mixture" to the engineLeave the oil supply and return lines connected to the engineRun the engine at approximately 1500 RPM for ten minutes to ensure that the entire fuel supply system is full of stabilized fuel