O.S. Engines

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Quality and performance has made O.S. the standard in RC engines for over 80 years.
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1,441-1,488 of 1,758 Results
Carburetor Gasket: 200 Surpass Carburetor Gasket: 200 Surpass
4.1 out of 5 Customer Rating
$7.46
Carburetor Reed Valve Gasket: GT33 Carburetor Reed Valve Gasket: GT33
4.1 out of 5 Customer Rating
$3.28 Price reduced from $10.94 to
Clearance Sale!
Gear Holder Screw: 30 Wankel Rotary Gear Holder Screw: 30 Wankel Rotary
4.7 out of 5 Customer Rating
$8.43
Intake Manifold: FS-62V Intake Manifold: FS-62V
3.3 out of 5 Customer Rating
$5.74 Price reduced from $19.14 to
Clearance Sale!
Piston Pin Retainer: 81VR-M Piston Pin Retainer: 81VR-M
3.9 out of 5 Customer Rating
$6.49
Piston: GT22 Piston: GT22
4.1 out of 5 Customer Rating
$63.22
Piston Pin: 32SX-H Piston Pin: 32SX-H
3.9 out of 5 Customer Rating
$11.91
Pushrods: 56FS-a Pushrods: 56FS-a
3.7 out of 5 Customer Rating
$2.80 Price reduced from $9.49 to
Clearance Sale!
Woodruff Key: 108-300 Woodruff Key: 108-300
5 out of 5 Customer Rating
$2.55 Price reduced from $8.49 to
Clearance Sale!
Crankcase: Sirius 7 Crankcase: Sirius 7
5 out of 5 Customer Rating
$432.78
Cylinder Head: 46AXII Cylinder Head: 46AXII
4.5 out of 5 Customer Rating
$25.19
Valve Adjustment Kit: 4-Stroke Valve Adjustment Kit: 4-Stroke
5 out of 5 Customer Rating
$15.78
Silencer F-5030: FS81 Alpha Silencer F-5030: FS81 Alpha
5 out of 5 Customer Rating
$57.78
Muffler Screws 10FP FSR (2) Muffler Screws 10FP FSR (2)
5 out of 5 Customer Rating
$6.49
Back Plate Gasket O-Ring: FL70 Back Plate Gasket O-Ring: FL70
3.3 out of 5 Customer Rating
$6.49
Rocker Cover: Sirius 7 Rocker Cover: Sirius 7
4.7 out of 5 Customer Rating
$14.77
Screw Set (8): 37SZ-H Screw Set (8): 37SZ-H
5 out of 5 Customer Rating
$2.96 Price reduced from $9.85 to
Clearance Sale!
Screw Set (12): FS-120 Surpass Screw Set (12): FS-120 Surpass
4.7 out of 5 Customer Rating
$17.08
Bearing R-1350ZZ Bearing R-1350ZZ
5 out of 5 Customer Rating
$14.99
Security Ring: OMA-38 Series Security Ring: OMA-38 Series
3.3 out of 5 Customer Rating
$5.99
M10 In-Cowl Exhaust Header Pipe Inverted 80D: FS56A M10 In-Cowl Exhaust Header Pipe Inverted 80D: FS56A
4.1 out of 5 Customer Rating
$36.85
O.S. Ball Link #6 22D Carb Speed B2103 Type S O.S. Ball Link #6 22D Carb Speed B2103 Type S
5 out of 5 Customer Rating
$17.16
Carb Reducer 7.5mm, Blue Carb Reducer 7.5mm, Blue
5 out of 5 Customer Rating
$20.99
Carburetor 12F4-B: Speed T1202 Carburetor 12F4-B: Speed T1202
3.1 out of 5 Customer Rating
$37.54 Price reduced from $125.13 to
Clearance Sale!
18TM Revo Manifold 18TM Revo Manifold
4.1 out of 5 Customer Rating
$52.77
Crankcase: 12XZ Spec II Speed Crankcase: 12XZ Spec II Speed
4.1 out of 5 Customer Rating
$21.00 Price reduced from $69.99 to
Clearance Sale!
Crankshaft: 21XZ-B Spec 2 Crankshaft: 21XZ-B Spec 2
3.9 out of 5 Customer Rating
$63.06 Price reduced from $210.21 to
Clearance Sale!
Needle Holder 21M: 21XZ-R Needle Holder 21M: 21XZ-R
5 out of 5 Customer Rating
$16.09
Metering Needle #11H #11HB Metering Needle #11H #11HB
4.7 out of 5 Customer Rating
$4.83 Price reduced from $16.09 to
Clearance Sale!
Carburetor Reducer 8.5mm, Purple: 21M Carburetor Reducer 8.5mm, Purple: 21M
5 out of 5 Customer Rating
$21.10
Rear Bearing: 12 Rear Bearing: 12
4.1 out of 5 Customer Rating
$6.35 Price reduced from $21.17 to
Clearance Sale!
Cover Plate: 28XZ Cover Plate: 28XZ
5 out of 5 Customer Rating
$6.67 Price reduced from $22.26 to
Clearance Sale!
Crankcase: 19XZ-B Speed Crankcase: 19XZ-B Speed
3.3 out of 5 Customer Rating
$47.31 Price reduced from $157.70 to
Clearance Sale!
Crankshaft: 12TG-P Crankshaft: 12TG-P
4.5 out of 5 Customer Rating
$50.83
Crankshaft: 21 Speed V-Spec Crankshaft: 21 Speed V-Spec
5 out of 5 Customer Rating
$174.99
O.S. Built-Up Parts Set Cyl Piston OS Speed R21GT O.S. Built-Up Parts Set Cyl Piston OS Speed R21GT
3.3 out of 5 Customer Rating
$89.58 Price reduced from $298.61 to
Clearance Sale!
Gasket Set: 12TG Gasket Set: 12TG
4.5 out of 5 Customer Rating
$10.94
Pump Plate (PD-09) 2/3 Assembly: GF30 II Pump Plate (PD-09) 2/3 Assembly: GF30 II
3.4 out of 5 Customer Rating
$71.58
Pan Head Screw +3.0X12 (10) Pan Head Screw +3.0X12 (10)
4.8 out of 5 Customer Rating
$9.53
Back Plate: Sirius 7 Back Plate: Sirius 7
4.2 out of 5 Customer Rating
$192.56 Price reduced from $466.21 to
Clearance Sale!
Crankcase: 65AX Crankcase: 65AX
5 out of 5 Customer Rating
$34.36 Price reduced from $114.52 to
Clearance Sale!
Crankcase: GT15 Crankcase: GT15
5 out of 5 Customer Rating
$37.51 Price reduced from $125.03 to
Clearance Sale!
Cylinder Liner: GT55 Cylinder Liner: GT55
4.2 out of 5 Customer Rating
$44.33 Price reduced from $118.99 to
Clearance Sale!
Gasket Set: FS-120 II Gasket Set: FS-120 II
5 out of 5 Customer Rating
$10.94
Pan Head Screw 3x18mm (10) Pan Head Screw 3x18mm (10)
5 out of 5 Customer Rating
$3.57 Price reduced from $11.91 to
Clearance Sale!
O-Ring IV PRC #6H Rubber O-Ring IV PRC #6H Rubber
5 out of 5 Customer Rating
$6.49
Piston: GT55 Piston: GT55
5 out of 5 Customer Rating
$72.99
Piston Ring: 55HZ Piston Ring: 55HZ
5 out of 5 Customer Rating
$26.24