2003 Johnson ST 6/8 HP 4 Stroke Outboards Service Manual, PN 5005471, Page 57Get this manual
MAINTENANCE PRE-SEASON SERVICE
PRE-SEASON SERVICE
If outboard was removed from boat for storage, make certain it has been reinstalled with factory specified hardwareRefer to INSTALLATION AND PREDELIVERY section for proper set-up proceduresApply light coating of Electrical Grease to the ribbed portion of the spark plug ceramics and the opening of the spark plug coversConnect spark plug leadsMake sure spark plug boots are not cracked or torn
Perform the 10-hour break-in procedure with the boat and outboard in the water, using an appropriate propeller DO NOT perform break-in using flushing device DO NOT start-up or run the outboard out of the water DO NOT leave running outboard unattended
Gearcase Lubricant
Check the lubricant level Inspect gearcase for leaksIf leak is apparent, pressure and vacuum test gearcase Repair gearcase as needed