O.S. Engines FT-300 Gemini User Manual
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IMPORTANT: Before attempting to operate your engine, please read through these instructions
and separate sheet enclosed so as to familiarize yourself with the controls and other features of
the engine. Also, pay careful attention to the recommendations contained in the "Safety Instruc-
tions and Warnings" leaflet enclosed.
Your "Gemini Series" engine is a scale-type horizontally-opposed twin-cylinder overhead-valve
four-stroke-cycle engine. It is a more powerful development of the FT-120 Gemini introduced
in 1979 and further demonstrates O.S. pre-eminence in four-stroke engine manufacture, as first
established in 1976 with the introduction of the single-cylinder FS-60 and continued in the latest
O.S. single, twin and multi-cylinder models.
Like all O.S. motors, the "Gemini Series" engines are built to standards of skilled craftsmanship
that have been developed through sixty years of O.S. production history, a history that is not
only the longest in the model engine manufacturing world, but includes such milestones as
the world's first and only production model 'Wankel' rotary engine, the world's first quantity-
produced model four-stroke-cycle engine and the world's first model aircraft engine to be equip-
ped with a genuine supercharger.
Quality is a watchword at the O.S. factory, which is equipped to a standard unequalled by any
other manufacturer in the industry world-wide. Fully computerized modem machinery and the
use of carefully selected top quality materials ensure the production of engines of consistent
performance and long life.
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