OS FS-64V, (10.46 ccm), (61T) incl. Muffler, # OS3AY00

The FSV series represents a new generation of O.S. four-stroke engines with valve control. Compared to the previous FS-Surpass and FS-α models, they are characterized by higher performance with the same installation dimensions, allowing you to easily benefit from the wide selection of kits and construction plans for model aircraft that have been developed for O.S. engines over the past decades.

• The new lubrication system eliminates the need for crankcase venting, thus removing the overflow hose common in previous generations of engines.
• The new 61T two-needle carburetor ensures stable and smooth operation across the entire speed range and easy engine adjustment. The carburetor can be rotated 180° to orient the main needle to the other side of the engine.
• The new muffler with increased volume and the ability to adjust the rear section with the exhaust pipe in the desired direction ensures effective damping and gives the engine a deep, soft sound.

• Separate covers for the engine's intake and exhaust valves provide a more realistic appearance.

The FS 64V is a four-stroke engine with valve control, designed for all types of model aircraft, and is particularly suitable for RC models. It is equipped with a 61T two-needle carburetor. The basic package also includes an F-4050 type exhaust muffler. The orientation of the exhaust pipe can be changed by rotating the rear part of the muffler 360°, and the orientation of the muffler body and the distance between the cylinder head and the muffler can be adjusted thanks to a threaded adapter bushing.

• The crankshaft has a UNF 1/4-28 propeller nut thread. The engine comes with a set of O.S. lock nuts for reliable propeller attachment.
• Recommended propeller sizes: Sport and Aerobatics: 12x7~8", 13x6" / Model Aircraft: 13x7~8", 14x6"
• Recommended fuel tank: 220–300 ml; a 220 ml tank provides 13–14 minutes of flight time, assuming you are not constantly flying at full throttle.
• Recommended fuel: at least 18% castor or synthetic oil, 5–20% nitromethane.
• Recommended glow plug: O.S. MAX Type F.

The engine set includes: FS 64V engine with 61T RC carburetor, F-4050 exhaust muffler, instruction manual.Technical Data

• Cooling: Air
• Width [mm]: 51mm
• Power: 1.14 (PS)
• Shaft Thread: UNF 1/4-28
• Mounting Hole Spacing Longitudinal [mm]: 17.5mm
• Carburetor: 61T
• Total Weight [g]: 442g
• Height approx. [mm]: 105.1mm
• Mounting Hole Ø [mm]: 3.7mm
• Speed Range approx.: 2400 - 11000 RPM
• Bore [mm]: 25.0mm
• Mounting Hole Spacing Transverse [mm]: 44mm
• Displacement [ccm]: 10.46 cm³
• Power kW (HP) at: 11000 RPM
• Recommended Propeller: 12x6 - 14x6
• Length to Hub: 102.8mm
• Stroke [mm]: 20.6mm
• Shaft Ø [mm]: 6.1mm
• Brand Name: O.S.
• Application: Model Aircraft
• incl. Muffler: Yes
• Fuel: Nitro
• Version: 4-Stroke Nitro
• Manufacturer's Part Number: OS3AY00