This document is the owner's instruction manual for the FLAT-TWIN FOUR STROKE ENGINE Gemini Series. It provides detailed information on the controls and other features of the engine. The Gemini Series engine is a scale-type horizontally-opposed twin-cylinder overhead-valve four-stroke-cycle engine, which is an upgraded version of the FT-120 Gemini. O.S. is renowned for its excellence in four-stroke engine manufacturing, and the Gemini Series engines are among their latest products. The O.S. factory has a production history of sixty years and is equipped with fully computerized manufacturing facilities.
This document serves as the owner's instruction manual for the Gemini Series of flat-twin four-stroke engines manufactured by O.S. Engines Mfg. Co., Ltd. It details the engine's features, including its development from the FT-120 model and its adherence to high craftsmanship standards established over sixty years of production history.
| Engine Type | Scale-type horizontally-opposed twin-cylinder overhead-valve four-stroke-cycle engine |
|---|---|
| Recommended Glowplug Type | O.S. Type F glowplug |
The special O.S. Type F glowplug is recommended for general use.
A 17 mm wrench is used for the sleeve-nut and washer, while a 14 mm wrench tightens the Safety Propeller Locknut.
The rod should have a diameter between 1.6-1.8 mm and an appropriate length.