1998 Johnson Evinrude "EC" 150, 175 FFI Service Manual, P/N 520211, Page 30Get this manual
Storage The ECU draws small amount of battery current at all timesIf the engine is not to be operated for 30-day or longer period, either turn the boat's selector switch off or remove the fuse from Position 7Use the following procedure to properly prepare Johnson and 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 avIC 2+4fuel conditioner, following directions on the bottle
When using flushing attachment, always remove engine's propeller before starting engine to prevent accidental contact with moving propeller
INote Use flushing attachment if you operate the engine on a
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 avIC Storage Fogging Oil 2'2 ozof avIC 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