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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1,393-1,440 of 1,758 Results
Carburetor Body: FS-52 Carburetor Body: FS-52
4.1 out of 5 Customer Rating
$29.49
Carburetor Screw: FS-20 Carburetor Screw: FS-20
5 out of 5 Customer Rating
$6.49
Carburetor Retainer: 12TZ Spec II Carburetor Retainer: 12TZ Spec II
3.7 out of 5 Customer Rating
$13.78
Crankshaft: T1201 Speed Crankshaft: T1201 Speed
5 out of 5 Customer Rating
$39.27 Price reduced from $130.92 to
Clearance Sale!
Crankshaft: 21VZ-B (P) Crankshaft: 21VZ-B (P)
4.5 out of 5 Customer Rating
$34.67 Price reduced from $115.57 to
Clearance Sale!
Inner Head: 25XZ Inner Head: 25XZ
3.7 out of 5 Customer Rating
$57.99
Outer Head: O.S. Max .12 TG Version 4 Outer Head: O.S. Max .12 TG Version 4
3.1 out of 5 Customer Rating
$74.79
Carburetor Rotor: 61G, 91HZ-R, Speed 3D Carburetor Rotor: 61G, 91HZ-R, Speed 3D
5 out of 5 Customer Rating
$52.52
O.S. Cylinder Piston Rod Set Speed B2103 Type S O.S. Cylinder Piston Rod Set Speed B2103 Type S
3.3 out of 5 Customer Rating
$72.89 Price reduced from $242.95 to
Clearance Sale!
Cylinder & Piston: 21XZ-B Speed Spec III Cylinder & Piston: 21XZ-B Speed Spec III
3.3 out of 5 Customer Rating
$52.97 Price reduced from $176.56 to
Clearance Sale!
Piston Pin: 28XZ Piston Pin: 28XZ
3.3 out of 5 Customer Rating
$3.27 Price reduced from $10.90 to
Clearance Sale!
Intake Manifold: GF40 Intake Manifold: GF40
3.6 out of 5 Customer Rating
$21.17
Connecting Rod: 32SX-H Connecting Rod: 32SX-H
4.4 out of 5 Customer Rating
$21.10
Connecting Rod: 40-46 Connecting Rod: 40-46
3.6 out of 5 Customer Rating
$22.04
Cover Plate: GT55 Cover Plate: GT55
5 out of 5 Customer Rating
$41.99
Crankcase: GT33 Crankcase: GT33
4 out of 5 Customer Rating
$97.81
Intake Pipe AS-L: FT-120 and FT-160 Intake Pipe AS-L: FT-120 and FT-160
5 out of 5 Customer Rating
$22.30
Muffler Assembly Screw F-5050 FS-95V Muffler Assembly Screw F-5050 FS-95V
3.6 out of 5 Customer Rating
$10.94
Piston: 55HZ Hyper Piston: 55HZ Hyper
3.6 out of 5 Customer Rating
$44.22
Piston Pin: FS72 Alpha Piston Pin: FS72 Alpha
5 out of 5 Customer Rating
$10.86
Prop Spacer 120-300 Prop Spacer 120-300
5 out of 5 Customer Rating
$8.43
Throttle Lever Nut #2CK #2H Throttle Lever Nut #2CK #2H
4 out of 5 Customer Rating
$1.95 Price reduced from $6.49 to
Clearance Sale!
Valve Spring Intake: FS-120 Surpass Valve Spring Intake: FS-120 Surpass
4.4 out of 5 Customer Rating
$6.49
Carburetor 70R: FS155A-P Carburetor 70R: FS155A-P
5 out of 5 Customer Rating
$157.70
Carburetor: GT33 Carburetor: GT33
4.8 out of 5 Customer Rating
$105.03 Price reduced from $190.20 to
Clearance Sale!
M10 In-Cowl Exhaust Header Pipe Side 60D: FS56A M10 In-Cowl Exhaust Header Pipe Side 60D: FS56A
4 out of 5 Customer Rating
$42.23
Muffler Extension: #744B Muffler Extension: #744B
4 out of 5 Customer Rating
$19.05
Cover Plate: FS81 Alpha Cover Plate: FS81 Alpha
5 out of 5 Customer Rating
$17.16
Cover Plate: FS81 Alpha Pump Cover Plate: FS81 Alpha Pump
4.8 out of 5 Customer Rating
$19.14
Crankcase: GT22 Crankcase: GT22
3.4 out of 5 Customer Rating
$97.70
Crankshaft: GF30 Crankshaft: GF30
5 out of 5 Customer Rating
$44.59 Price reduced from $148.62 to
Clearance Sale!
Crank Pin Stop Screw: GT33 Crank Pin Stop Screw: GT33
3.6 out of 5 Customer Rating
$10.94
Cylinder Liner: 120 240 Cylinder Liner: 120 240
4 out of 5 Customer Rating
$15.77 Price reduced from $52.57 to
Clearance Sale!
Cylinder Liner: GT15HZ Cylinder Liner: GT15HZ
5 out of 5 Customer Rating
$105.05
Drive Washer: 160FX Drive Washer: 160FX
5 out of 5 Customer Rating
$27.29
Exhaust Pipe Nut: F90-240 Exhaust Pipe Nut: F90-240
4.4 out of 5 Customer Rating
$6.49
Front Housing: Sirius 7 Front Housing: Sirius 7
4.4 out of 5 Customer Rating
$210.06 Price reduced from $519.74 to
Clearance Sale!
Mixture Control Valve #70C: FS120 Surpass II Mixture Control Valve #70C: FS120 Surpass II
4 out of 5 Customer Rating
$22.26
Muffler Fixing Screw E-4051: GT15HZ Muffler Fixing Screw E-4051: GT15HZ
5 out of 5 Customer Rating
$11.80
Needle #7M #7LFS Needle #7M #7LFS
3.6 out of 5 Customer Rating
$13.78
Pushrod Cover: FS-62V Pushrod Cover: FS-62V
3.6 out of 5 Customer Rating
$14.84
Cover Fitting Screw (4) FL-70 Cover Fitting Screw (4) FL-70
5 out of 5 Customer Rating
$4.99
Throttle Lever Assembly #2CK Throttle Lever Assembly #2CK
3.6 out of 5 Customer Rating
$7.49
Propeller Shaft Set: 3805 3810 Propeller Shaft Set: 3805 3810
4.4 out of 5 Customer Rating
$8.39 Price reduced from $27.99 to
Clearance Sale!
Carburetor: FT160, FF320 Carburetor: FT160, FF320
4.1 out of 5 Customer Rating
$102.95
Mid Bearing: 120-240 Mid Bearing: 120-240
5 out of 5 Customer Rating
$32.99
Carburetor Rotor: 40L, 55HZ Hyper Carburetor Rotor: 40L, 55HZ Hyper
3.7 out of 5 Customer Rating
$11.97 Price reduced from $39.91 to
Clearance Sale!
Carburetor Retainer: #61B, 91HZ Carburetor Retainer: #61B, 91HZ
5 out of 5 Customer Rating
$13.78