A PRE-MIX FUEL FOR OUTBOARD MOTORS

Lubrication for outboard motors is achieved primarily through the mixing or blending of oil and gasoline in certain proportions according to the manufacturers specifications. 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 content in the fuel mix - a definite ratio of oil to gasoline. The use of too little oil obviously leads to premature wear and early break down. On the otherhand, a fuel mixture richer in oil 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 effects of excessive carbon accumulation which characteristically follow. The frequent occurrence of spark plug changes may similarily be traced to an over abundance of oil in the fuel mixture.

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 the efficient lubrication of Johnson motors and economy of operation. The ratio of 1 to 24 is equivalent to 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 a high quality outboard oil (S.A.E. 30) and non-premium gasoline.

Instructions relating to the mixing of fuel as otherwise published in the Operators Manual and provided with each new motor shipped from the factory, are explicit and correct in every respect - mixing 1/3 pint of high

quality outboard oil (S.A.E. 30) with each gallon of gasoline or 1 quart per each 6 gallons, the ratio of which in either event is 1 to 24. Care, nevertheless, should be exercised during each refill to make certain that the recommended 1 to 24 ratio spread is being constantly maintained at all times for best results.

Many ills, all costly to the operator, can be laid to careless blending of the fuel mix during seasonal operation - wittingly or not. Every possible effort should accordingly be made to avoid them by adhering strictly to the desired and factory recommended 1 to 24 ratio of oil to gasoline for -

1. Best performance

2. Uninterrupted boating

3. Prolonged spark plug life

4. Economy of operation

Every tune-up and/ or repair should among other things include -

1. Draining the operators fuel tank of existing contents.

2. Replace with a known 1 to 24 fuel mix.

3. A word of advise to the operator for his benefit advocating the use of a reliable 1 to 24 pre-mix during future refills where and whenever available or exercise caution when obtaining manually blended refills - insisting on a precise 1 to 24 mix of high quality Outboard Oil and Non-premium Gasoline.

JOHNSON MOTORS

Jack Penland
Service Promotion Manager