1974 Johnson 40 HP Outboard Motors Service manual, Page 92Get this manual
JOHNSON 50 TO LUBRICANT We recommend using JOHNSON 50 LUBRICANTJOHNSON 50 LUBRICANT is designed specifically for Johnson outboard motor use at 50 to gasoline to lubricant ratio for engine break in and after break in, new and older modelsThis improved lubrication is formulated to provide additional benefits such as: exceptionallubri cation, less varnish and combustion chamber deposits, bette spark plug life, good mixability with gasoline even in cold weatherand reduction of pre-ignition NOTE
IC ohnson 50 Lubricant should not be available, see lubrication instructions Section 2