O.S. Max IL-300 Dia-Star 4-Cylinder, 4-Stroke Inline Limited Edition Collector's Engine.

**The black colored Collector Exhaust Pipe shown in the photo**
*is optional and NOT included with this engine.**
**The engine will operate fine with the included exhaust pipe assemblies.**

O.S. Max FR5-300 "Sirius" 4-Stroke, 5-Cylinder Radial Engine. This engine is very popular with the "Giant Scale" modelers with its abundant power, low vibration, smooth operation, and realistic noise levels. This engine is the masterpiece of O.S. Multi-Cylinder 4-Stroke Engines!

Power your prized Giant scale plane with an O.S. Multi-Cylinder 4-Stroke Engine. The O.S. FF-320 (Nicknamed "Pegasus") is a Flat-Four Cylinder Engine. It is the ultimate in scale realism: abundant power, realistic noise levels, and scale appearance. This engine is covered by a 2-Year Warranty.

O.S. FT-300 Twin-Cylinder 4-stroke engine. This engine is a flat (Opposed) twin-cylinder engine, called the Gemini-300". It is scale-like in appearance when installed in a Piper Cub or Citabria.

This is a FT-160 Twin-Cylinder 4-Stroke Engine from O.S. Max. This Engine is a Flat (Opposed) Twin-Cylinder Engine, called the Gemini-160". It is Scale-Like in Appearance when Installed in a Piper Cub or Citabria.

This is the 1.40RX engine from O.S. for F3A contest flying. It conforms to the new rules for powerplants.

O.S. Max 49-PI Type II 30 Wankel Rotary Engine.

O.S. Engines FS110 Alpha 4-Stroke Aircraft Engine W/5040 Silencer.

This is one of the O.S. Surpass series of 4-stroke model engines. The Surpass series is the 2nd series of 4-stroke engines (The 1st series was the FS series, discontinued and replaced by the Surpass series around 1986-7). "Surpass" refers to this series gaining 30% more power than the previous FS series.

This is one of the O.S. Surpass series of 4-stroke model engines. The Surpass series is the 2nd series of 4-stroke engines (The 1st series was the FS series, discontinued and replaced by the Surpass series around 1986-7). "Surpass" refers to the fact that this series gained 30% more power than the previous FS series.

FS-91 Surpass 4-stroke Engine with Pump Unit. This engine does not use a choke valve OR a return fuel line to the tank. There are No Tools OR Extra Needle Valve, as stated in the instructions.

This BGX-1 is the engine of choice for those Giant Scale Modelers. The BGX-1 35cc Engine was designed as a lighter, more powerful, less vibration, and more compact alternative to the converted chainsaw gasoline engines. One drawback; fuel economy is better with the chainsaw engines, and fuel is less expensive. The BGX-1 includes an engine mount that mounts to the firewall in the same bolt pattern as the backplate-style engine mounts that come with SuperTigre's models S2000, S2500, and S3000(K) engines. You can directly replace any of those engines with the BGX-1 without redrilling your firewall. This engine is covered under the O.S. 2-YEAR WARRANTY.

O.S. Ducted Fan Engines are designed to develop high power at high RPM. These are used in Jet (ducted fan) Models where the engine drives a turbine-like impeller (compressor) that draws a large quantity of air through a shroud to create thrust. These engines are NOT covered under the O.S. 2-year warranty. Because this is a high-performance engine, reliability is sacrificed. The Ducted Fan does NOT come with this engine. One must purchase the fan to fit BOTH the engine size and the specific plane (these fan units are typically manufactured by the same people who make the plane kit - a company like Jet Hangar Hobbies.

This is the FS-91II Surpass 4-Stroke Engine. This engine does not use a choke valve OR use a return fuel line to the tank. THERE ARE NO TOOLS OR EXTRA NEEDLE VALVE AS STATED IN THE INSTRUCTIONS.

O.S. Max 1.60 FX high-performance R/C engine used for sport and aerobatic aircraft. This 1.60 FX is designed to use a muffler or tuned pipe.

O.S. Ducted Fan engines are designed to develop high power at high RPM. These are used in jet (Ducted Fan) models where the engine drives a turbine-like impeller (compressor) that draws a large quantity of air through a shroud to create thrust. These engines are NOT covered under the O.S. 2-year warranty, (due to the high-performance nature of this engine, reliability is sacrificed). The Ducted Fan DOES NOT come with this engine. One must purchase the fan to fit BOTH the engine size and the specific plane (these fan units are typically manufactured by the same people who make the plane kit - like Jet Hangar Hobbies.

This is the .70 SZ-H Ring Engine from O.S. designed with the FAI F3C Pilot in mind.

Thunder Tiger F-130S is the all-new & largest powerhouse in the Thunder Tiger F series 4-stroke engine line. It is the ultimate in four-stroke performance: the ability to swing a large prop, increased torque, reduced noise and improved fuel economy.

O.S. Max 1.60 FX high-performance R/C engine used for sport and aerobatic aircraft. This 1.60 FX is designed to use a muffler or tuned pipe (Neither Included).

O.S. Max Two Stroke 1.20AX Ringed Engine with Muffler.