2003 Johnson ST 6/8 HP 4 Stroke Outboards Service Manual, PN 5005471, Page 56Get this manual
MAINTENANCE STORAGE
STORAGE
Fuel System Treatment
Stabilize the boat's fuel supply with 2+4 Fuel Conditionerfollowing the instructions on the container
Additional Recommendations
Replace gearcase lubricantRemove and inspect propellerClean and grease propeller shaftLubricate all grease fittings and linkagesClean or replace fuel filter elementInspect outboard, steering system, and controlsReplace all damaged and worn componentsRefer to maintenance and lubrication recommendationsTouch up painted surfaces as neededCoat outer painted surfaces with automotive wax Store outboard in upright (vertical) position Check for fuel leakage
IMPORTANT: DO NOT start outboard without water supply to the outboard's cooling system Cooling system andor powerhead damage could occurShift the remote control to NEUTRAL and remove the propellerStart outboard and run at IDLE speed for five minutes to ensure that the entire fuel system is filled with the stabilized fuel mixtureProceed with Internal Engine Treatment