WHY A PRE-MIX FUEL FOR OUTBOARD MOTORS Lubrication for outboard engines is achieved primarily through the mixing or blending of oil and gasoline in certain proportions according to the manufacturers recommendations. As such, the oil for lubrication and the gasoline for combustion flow simultaneously through the carburetor, where appropriately mixed with air enter the crankcase in a vapor like stream, thereafter to be compressed and transferred to the combustion chamber. The oil content thus performs its chore of ‘lubricating the internal moving parts after which it is dissipated by combustion and discharge through the exhaust system. - Lubrication to be most effective in the two stroke (cycle) engine requires just so much oil in the fuel,mix. The use of too little obviously leads to premature wear and early break-down... On the otherhand, a fuel mixture richer in oil content than recommended..or demanded, is not only wasteful and costly but contributes to faulty performance and in time, to expensive corrective measures because of the disturbing effect of excessive carbon accumulation which characteristically follows. The frequent occurrence of spark plug changes may similarly be traced to an over abundance of oil in the fuel mix. .

Our engineering Department has, after long research and evaluation, developed a ratio of 1 part oil to 24 parts of gasoline by volume as best suited for efficient lub- rication of Johnson outboard motors and economy of operation. The ratio of 1 to 24 is equivalent of 1/3 pint to 1 gallon or 1 quart per each 6 gallons.

We cannot stress too. emphatically the value and importance of adhering to the engineered 1 to 24. ratio for continued uninterrupted performance. As a consequence, the operators best assurance of maintaining consistently the specified fuel mix ratio is through the use of a 1 ‘to 24 pre-mix purchased from reliable and responsible fuel dealers dispensing high quality Outboard Oil (S.A.E.#30) and Non Premium Gasoline. : an Instructions relating to the mixing of fuel otherwise as published in the Operators Manual are explicit and correct in every respect - mixing thoroughly 1/3 pint of an Outboard Oil with each gallon of gasoline or 1 quart per each 6 gallons, the ratio of which in either event is 1 to 24.

As instructed, 1 quart of oil to an empty fuel tank of 6 gallon capacity is blending properly at the ratio of 1 to 24 but, it must be accepted that. few if any operators ever permit their fuel tanks to run fully dry before seeking-a refill - running the tank down to perhaps a quart or two of the original fill but-still low enough to indicate Zero or Empty on the fuel gauge. The most likely sequence then is to pour in 1 quart of oil as specified and carefully mix it with enough gasoline to fill the tank which however would be somewhat less than 6 gallons in this event due to the oil having been poured in, not into a fully dry or empty tank but in addition to the quart or two of the preceding mix left in the tank at the time.