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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222-269 of 1,758 Results
Intake Manifold Assembly: FS-91 Surpass II Intake Manifold Assembly: FS-91 Surpass II
5 out of 5 Customer Rating
Intake Manifold Assembly: FS-91 Surpass II
$29.49
Pushrod Cover Assembly: FS72 Alpha Pushrod Cover Assembly: FS72 Alpha
5 out of 5 Customer Rating
Pushrod Cover Assembly: FS72 Alpha
$3.54 Price reduced from $11.80 to
Clearance Sale! ⓘ
Piston Pin; FS-62V Piston Pin; FS-62V
4.7 out of 5 Customer Rating
Piston Pin; FS-62V
$3.57 Price reduced from $11.91 to
Clearance Sale! ⓘ
Rotor Stop #3A #2A Rotor Stop #3A #2A
5 out of 5 Customer Rating
Rotor Stop #3A #2A
$6.49
Standoff 5x25.4mm 1" (4): GT55 Standoff 5x25.4mm 1" (4): GT55
4.3 out of 5 Customer Rating
Standoff 5x25.4mm 1" (4): GT55
$36.85
Cylinder Liner: FS-95V Cylinder Liner: FS-95V
4.1 out of 5 Customer Rating
Cylinder Liner: FS-95V
$45.01
Gasket Exhaust: GT55 Gasket Exhaust: GT55
5 out of 5 Customer Rating
Gasket Exhaust: GT55
$7.46
Silencer Body Gasket: 200 Surpass Silencer Body Gasket: 200 Surpass
3.3 out of 5 Customer Rating
Silencer Body Gasket: 200 Surpass
$2.24 Price reduced from $7.46 to
Clearance Sale! ⓘ
Piston: 200 Surpass Piston: 200 Surpass
5 out of 5 Customer Rating
Piston: 200 Surpass
$57.96
Valve Spring Retainer: FS-70SII Valve Spring Retainer: FS-70SII
3.3 out of 5 Customer Rating
Valve Spring Retainer: FS-70SII
$6.49
Motor Mount: FT120, FT160 Motor Mount: FT120, FT160
3.7 out of 5 Customer Rating
Motor Mount: FT120, FT160
$44.13
Front Ball Bearing: 40, 46, 48 Front Ball Bearing: 40, 46, 48
3.7 out of 5 Customer Rating
Front Ball Bearing: 40, 46, 48
$21.17
Carburetor Reducer 7mm, Red: Speed 21 V-Spec Carburetor Reducer 7mm, Red: Speed 21 V-Spec
5 out of 5 Customer Rating
Carburetor Reducer 7mm, Red: Speed 21 V-Spec
$21.10
Cover Plate: 105HX-R Cover Plate: 105HX-R
5 out of 5 Customer Rating
Cover Plate: 105HX-R
$28.45
Inner Cylinder Head: 12XZ Inner Cylinder Head: 12XZ
4.1 out of 5 Customer Rating
Inner Cylinder Head: 12XZ
$32.56
Crankshaft: O.S. Speed B2104 Crankshaft: O.S. Speed B2104
5 out of 5 Customer Rating
Crankshaft: O.S. Speed B2104
$237.99
Cylinder & Piston: 21XZ-GT Speed Cylinder & Piston: 21XZ-GT Speed
4.1 out of 5 Customer Rating
Cylinder & Piston: 21XZ-GT Speed
$177.63
Needle Holder #20E Needle Holder #20E
3.7 out of 5 Customer Rating
Needle Holder #20E
$16.09
Cylinder Head: 91SX-H Complete Cylinder Head: 91SX-H Complete
4.4 out of 5 Customer Rating
Cylinder Head: 91SX-H Complete
$30.00 Price reduced from $99.99 to
Clearance Sale! ⓘ
Radial Mount: 72FS-a Radial Mount: 72FS-a
4.8 out of 5 Customer Rating
Radial Mount: 72FS-a
$44.34
Carburetor Rotor: 80T Sirius 7 Carburetor Rotor: 80T Sirius 7
5 out of 5 Customer Rating
Carburetor Rotor: 80T Sirius 7
$13.25 Price reduced from $44.18 to
Clearance Sale! ⓘ
Cover Plate: FS91-P Cover Plate: FS91-P
5 out of 5 Customer Rating
Cover Plate: FS91-P
$21.10
Crankshaft: 50SX Crankshaft: 50SX
5 out of 5 Customer Rating
Crankshaft: 50SX
$47.99
Cylinder Liner: FT-300 Cylinder Liner: FT-300
5 out of 5 Customer Rating
Cylinder Liner: FT-300
$59.99
Drive Washer: 25LA-S Drive Washer: 25LA-S
4.8 out of 5 Customer Rating
Drive Washer: 25LA-S
$6.49
Head Gasket: FR5 Head Gasket: FR5
3.6 out of 5 Customer Rating
Head Gasket: FR5
$11.72
Intake Pipe AS-R: FT-240 Intake Pipe AS-R: FT-240
4.8 out of 5 Customer Rating
Intake Pipe AS-R: FT-240
$22.16
Hex Head Screw 5x55mm (10) Hex Head Screw 5x55mm (10)
3.2 out of 5 Customer Rating
Hex Head Screw 5x55mm (10)
$13.78
Front Bearing: 21-61 Front Bearing: 21-61
4.8 out of 5 Customer Rating
Front Bearing: 21-61
$21.17
Cam Cover: FS-20 Supass Cam Cover: FS-20 Supass
4 out of 5 Customer Rating
Cam Cover: FS-20 Supass
$7.99
Pushrod Cover Assembly: 200 Surpass Pushrod Cover Assembly: 200 Surpass
5 out of 5 Customer Rating
Pushrod Cover Assembly: 200 Surpass
$11.84
Pushrod Cover Assembly: FT-120-240 Pushrod Cover Assembly: FT-120-240
3.6 out of 5 Customer Rating
Pushrod Cover Assembly: FT-120-240
$21.10
Piston Pin: GT55 Piston Pin: GT55
4.4 out of 5 Customer Rating
Piston Pin: GT55
$6.30 Price reduced from $19.14 to
Clearance Sale! ⓘ
Rotor Guide Screw: F90-300 Rotor Guide Screw: F90-300
3.6 out of 5 Customer Rating
Rotor Guide Screw: F90-300
$6.49
Rear Housing: FT-160 Rear Housing: FT-160
5 out of 5 Customer Rating
Rear Housing: FT-160
$97.81
Hex Head Screw 4x15mm (10) Hex Head Screw 4x15mm (10)
5 out of 5 Customer Rating
Hex Head Screw 4x15mm (10)
$11.80
Valve Assembly Intake: FS-120 Surpass Valve Assembly Intake: FS-120 Surpass
4.8 out of 5 Customer Rating
Valve Assembly Intake: FS-120 Surpass
$44.10
Bearing Set: OMA-2820-950 Bearing Set: OMA-2820-950
3.6 out of 5 Customer Rating
Bearing Set: OMA-2820-950
$30.99
O.S. Cover Plate Speed B2103 Type R & Type S O.S. Cover Plate Speed B2103 Type R & Type S
3.4 out of 5 Customer Rating
O.S. Cover Plate Speed B2103 Type R & Type S
$25.40
Carburetor Reducer 7.0MM AL2, Blue Carburetor Reducer 7.0MM AL2, Blue
5 out of 5 Customer Rating
Carburetor Reducer 7.0MM AL2, Blue
$20.05
103 Air Cleaner Body 103 Air Cleaner Body
4.8 out of 5 Customer Rating
103 Air Cleaner Body
$10.99
Carburetor 22B: 21XR-B Carburetor 22B: 21XR-B
4.8 out of 5 Customer Rating
Carburetor 22B: 21XR-B
$119.78
Crankshaft: 30VG Crankshaft: 30VG
4 out of 5 Customer Rating
Crankshaft: 30VG
$52.99
Cylinder/Piston/Rod: T1201 Speed Cylinder/Piston/Rod: T1201 Speed
5 out of 5 Customer Rating
Cylinder/Piston/Rod: T1201 Speed
$193.94
Inner Head: 19XZ-B Speed Inner Head: 19XZ-B Speed
5 out of 5 Customer Rating
Inner Head: 19XZ-B Speed
$57.73
Dust Cap Set: 12-30 Class Dust Cap Set: 12-30 Class
3.6 out of 5 Customer Rating
Dust Cap Set: 12-30 Class
$9.85
Throttle Stop Screw 22C(B): Speed B2102 Throttle Stop Screw 22C(B): Speed B2102
3.6 out of 5 Customer Rating
Throttle Stop Screw 22C(B): Speed B2102
$11.87
Diaphragm (PD-09): GF30 II Diaphragm (PD-09): GF30 II
4.5 out of 5 Customer Rating
Diaphragm (PD-09): GF30 II
$7.99
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