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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270-317 of 1,758 Results
Cylinder Head: 25LA Natural Cylinder Head: 25LA Natural
5 out of 5 Customer Rating
Cylinder Head: 25LA Natural
$17.08
Rear Bearing: FS-62V Rear Bearing: FS-62V
4.5 out of 5 Customer Rating
Rear Bearing: FS-62V
$25.19
Rear Bearing: 25FX, 32F Rear Bearing: 25FX, 32F
4.1 out of 5 Customer Rating
Rear Bearing: 25FX, 32F
$21.17
Carburetor Body: #21K Carburetor Body: #21K
5 out of 5 Customer Rating
Carburetor Body: #21K
$48.51
Drive Washer: FS-120 II Drive Washer: FS-120 II
3.3 out of 5 Customer Rating
Drive Washer: FS-120 II
$24.23
Gasket Set: 70SZ-H Gasket Set: 70SZ-H
4.1 out of 5 Customer Rating
Gasket Set: 70SZ-H
$7.46
Mixture Control Valve Spring Mixture Control Valve Spring
5 out of 5 Customer Rating
Mixture Control Valve Spring
$1.95 Price reduced from $6.49 to
Clearance Sale! ⓘ
Screw Assembly: F-5030 FS81 Alpha Screw Assembly: F-5030 FS81 Alpha
4.3 out of 5 Customer Rating
Screw Assembly: F-5030 FS81 Alpha
$9.85
Pushrod Cover: 56FS-a Pushrod Cover: 56FS-a
5 out of 5 Customer Rating
Pushrod Cover: 56FS-a
$2.53 Price reduced from $8.43 to
Clearance Sale! ⓘ
Drive Pin: FL-70 Drive Pin: FL-70
3.3 out of 5 Customer Rating
Drive Pin: FL-70
$6.49
Rocker Arm: FS-62V Rocker Arm: FS-62V
4.1 out of 5 Customer Rating
Rocker Arm: FS-62V
$7.63 Price reduced from $25.44 to
Clearance Sale! ⓘ
Rotation Sensor: GT55 Rotation Sensor: GT55
3.3 out of 5 Customer Rating
Rotation Sensor: GT55
$63.20
Lock Washer 3mm Lock Washer 3mm
3.7 out of 5 Customer Rating
Lock Washer 3mm
$19.14
Crankshaft: 75AX Crankshaft: 75AX
3.7 out of 5 Customer Rating
Crankshaft: 75AX
$66.04
Crankshaft: FS155A-P Crankshaft: FS155A-P
4.1 out of 5 Customer Rating
Crankshaft: FS155A-P
$109.12
Drive Washer: GT15HZ Drive Washer: GT15HZ
3.3 out of 5 Customer Rating
Drive Washer: GT15HZ
$48.51
Head Gasket: 200 Surpass Head Gasket: 200 Surpass
4.1 out of 5 Customer Rating
Head Gasket: 200 Surpass
$6.49
Intake Pipe Assembly: FS-91-P Intake Pipe Assembly: FS-91-P
3.3 out of 5 Customer Rating
Intake Pipe Assembly: FS-91-P
$29.49
Throttle Stop Screw #40D Throttle Stop Screw #40D
5 out of 5 Customer Rating
Throttle Stop Screw #40D
$6.49
Carburetor Rotor: #60K Carburetor Rotor: #60K
5 out of 5 Customer Rating
Carburetor Rotor: #60K
$10.49 Price reduced from $34.99 to
Clearance Sale! ⓘ
Carburetor Rotor: 70T, GF30 Carburetor Rotor: 70T, GF30
4.7 out of 5 Customer Rating
Carburetor Rotor: 70T, GF30
$18.94 Price reduced from $63.12 to
Clearance Sale! ⓘ
Cover Plate: B2101 Speed Cover Plate: B2101 Speed
3.7 out of 5 Customer Rating
Cover Plate: B2101 Speed
$25.44
Crankcase: B2101 Speed Crankcase: B2101 Speed
5 out of 5 Customer Rating
Crankcase: B2101 Speed
$152.45
O.S. Outer Head Speed B2103 Type R O.S. Outer Head Speed B2103 Type R
5 out of 5 Customer Rating
O.S. Outer Head Speed B2103 Type R
$30.74 Price reduced from $102.47 to
Clearance Sale! ⓘ
Carburetor Body: 21JN Carburetor Body: 21JN
3.7 out of 5 Customer Rating
Carburetor Body: 21JN
$79.99
Crankcase: 25LA Natural Crankcase: 25LA Natural
5 out of 5 Customer Rating
Crankcase: 25LA Natural
$34.86
Crankshaft: Recoil 30VG Crankshaft: Recoil 30VG
4.1 out of 5 Customer Rating
Crankshaft: Recoil 30VG
$66.04
Mixture Control Screw: 120 Surpass Mixture Control Screw: 120 Surpass
5 out of 5 Customer Rating
Mixture Control Screw: 120 Surpass
$2.10 Price reduced from $6.49 to
Clearance Sale! ⓘ
Needle High Speed WLA-2: GT55 Needle High Speed WLA-2: GT55
3.1 out of 5 Customer Rating
Needle High Speed WLA-2: GT55
$15.99
Metering Needle Assembly: 21VZB (P) V-Spec 21C Metering Needle Assembly: 21VZB (P) V-Spec 21C
5 out of 5 Customer Rating
Metering Needle Assembly: 21VZB (P) V-Spec 21C
$19.14
Cover Plate Assembly: GGT10 Cover Plate Assembly: GGT10
5 out of 5 Customer Rating
Cover Plate Assembly: GGT10
$16.39 Price reduced from $54.63 to
Clearance Sale! ⓘ
Crankshaft: FS72 Alpha Crankshaft: FS72 Alpha
3.7 out of 5 Customer Rating
Crankshaft: FS72 Alpha
$74.90
Under Cover: IL-300 Dia-Star Under Cover: IL-300 Dia-Star
3.7 out of 5 Customer Rating
Under Cover: IL-300 Dia-Star
$16.81
Rocker Cover Gasket: GF40 Rocker Cover Gasket: GF40
3.7 out of 5 Customer Rating
Rocker Cover Gasket: GF40
$10.94
Head Gasket: 56 FS Head Gasket: 56 FS
5 out of 5 Customer Rating
Head Gasket: 56 FS
$6.49
Exhaust Header Pipe Assembly F-5050: FS-95V Exhaust Header Pipe Assembly F-5050: FS-95V
3.9 out of 5 Customer Rating
Exhaust Header Pipe Assembly F-5050: FS-95V
$19.14
Cover Plate: 200 Surpass Cover Plate: 200 Surpass
5 out of 5 Customer Rating
Cover Plate: 200 Surpass
$22.30
Lever Metering WLA-2: GT55 Lever Metering WLA-2: GT55
5 out of 5 Customer Rating
Lever Metering WLA-2: GT55
$11.87
Pushrod Cover Assembly: 120Surpass Pushrod Cover Assembly: 120Surpass
4.7 out of 5 Customer Rating
Pushrod Cover Assembly: 120Surpass
$22.04
Rocker Arm Assembly: 200 Surpass Rocker Arm Assembly: 200 Surpass
4.1 out of 5 Customer Rating
Rocker Arm Assembly: 200 Surpass
$11.05 Price reduced from $36.85 to
Clearance Sale! ⓘ
Intake Manifold: 56 FS Intake Manifold: 56 FS
4.1 out of 5 Customer Rating
Intake Manifold: 56 FS
$19.14
Carburetor Screw: FS61-FT300 Carburetor Screw: FS61-FT300
4.1 out of 5 Customer Rating
Carburetor Screw: FS61-FT300
$6.49
Connecting Rod: 28XZ Connecting Rod: 28XZ
5 out of 5 Customer Rating
Connecting Rod: 28XZ
$14.55 Price reduced from $48.51 to
Clearance Sale! ⓘ
Crankcase: T1201 Speed Crankcase: T1201 Speed
5 out of 5 Customer Rating
Crankcase: T1201 Speed
$87.17
Crankshaft: 91HZ-R Speed 3D 3C Crankshaft: 91HZ-R Speed 3D 3C
4.7 out of 5 Customer Rating
Crankshaft: 91HZ-R Speed 3D 3C
$102.54
Fuel Nipple: #20A, B Fuel Nipple: #20A, B
3.1 out of 5 Customer Rating
Fuel Nipple: #20A, B
$10.86
Needle Valve Assembly 12F2-B: Speed T1202 Needle Valve Assembly 12F2-B: Speed T1202
3.9 out of 5 Customer Rating
Needle Valve Assembly 12F2-B: Speed T1202
$8.19 Price reduced from $27.29 to
Clearance Sale! ⓘ
Cover Plate: 21VG-P Cover Plate: 21VG-P
3.7 out of 5 Customer Rating
Cover Plate: 21VG-P
$13.78
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