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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942-989 of 1,758 Results
Cylinder Rebuild Kit: 21XR-B Cylinder Rebuild Kit: 21XR-B
4.1 out of 5 Customer Rating
Cylinder Rebuild Kit: 21XR-B
$44.98 Price reduced from $149.93 to
Clearance Sale! ⓘ
O.S. Inner Head with O-Ring Speed B2103 Type R & S O.S. Inner Head with O-Ring Speed B2103 Type R & S
5 out of 5 Customer Rating
O.S. Inner Head with O-Ring Speed B2103 Type R & S
$57.75
Metering Needle Assembly: 21VG Metering Needle Assembly: 21VG
3.9 out of 5 Customer Rating
Metering Needle Assembly: 21VG
$16.99
Valve Spring: FS-26S-C Valve Spring: FS-26S-C
4.1 out of 5 Customer Rating
Valve Spring: FS-26S-C
$6.49
Carburetor Rotor: #61B, 91HZ Carburetor Rotor: #61B, 91HZ
3.6 out of 5 Customer Rating
Carburetor Rotor: #61B, 91HZ
$13.19 Price reduced from $43.99 to
Clearance Sale! ⓘ
Connecting Rod: 70SZ-H Connecting Rod: 70SZ-H
3.2 out of 5 Customer Rating
Connecting Rod: 70SZ-H
$29.49
Crankcase Plug: GT55 Crankcase Plug: GT55
3.4 out of 5 Customer Rating
Crankcase Plug: GT55
$17.16
Cylinder Head: 140RX Cylinder Head: 140RX
5 out of 5 Customer Rating
Cylinder Head: 140RX
$71.53
Cylinder Head: GT15HZ Cylinder Head: GT15HZ
4.8 out of 5 Customer Rating
Cylinder Head: GT15HZ
$32.41 Price reduced from $108.03 to
Clearance Sale! ⓘ
Cylinder Liner: 50SX-H Cylinder Liner: 50SX-H
3.6 out of 5 Customer Rating
Cylinder Liner: 50SX-H
$58.90
Head Gasket: FT-160 Head Gasket: FT-160
4.4 out of 5 Customer Rating
Head Gasket: FT-160
$6.45
Mixture Control Valve: 46AXII Mixture Control Valve: 46AXII
4.4 out of 5 Customer Rating
Mixture Control Valve: 46AXII
$30.44
Silencer E-4010A: 65AX Silencer E-4010A: 65AX
5 out of 5 Customer Rating
Silencer E-4010A: 65AX
$52.62
Needle Control Lever In Flight Needle Valve Needle Control Lever In Flight Needle Valve
3.4 out of 5 Customer Rating
Needle Control Lever In Flight Needle Valve
$6.49
Piston: FS-91 Surpass FT-160 Piston: FS-91 Surpass FT-160
3.6 out of 5 Customer Rating
Piston: FS-91 Surpass FT-160
$44.22
Piston Pin: 50SX-H Piston Pin: 50SX-H
3.6 out of 5 Customer Rating
Piston Pin: 50SX-H
$11.72
Prop Washer: 40LA Prop Washer: 40LA
4.8 out of 5 Customer Rating
Prop Washer: 40LA
$6.49
Rotor Guide Screw #10A Rotor Guide Screw #10A
4.4 out of 5 Customer Rating
Rotor Guide Screw #10A
$2.59 Price reduced from $8.66 to
Clearance Sale! ⓘ
Carburetor #60LH: 50SX-H Hyper Carburetor #60LH: 50SX-H Hyper
4.4 out of 5 Customer Rating
Carburetor #60LH: 50SX-H Hyper
$97.88
Carburetor WT: GF40 Carburetor WT: GF40
4 out of 5 Customer Rating
Carburetor WT: GF40
$190.20
M11 In-Cowl Exhaust Header Pipe Inverted 80D: FS72A M11 In-Cowl Exhaust Header Pipe Inverted 80D: FS72A
4.4 out of 5 Customer Rating
M11 In-Cowl Exhaust Header Pipe Inverted 80D: FS72A
$36.85
Muffler: E-2030, 20-25FP Muffler: E-2030, 20-25FP
5 out of 5 Customer Rating
Muffler: E-2030, 20-25FP
$26.24
Carburetor Body: #60P, FS-91 Surpass II Carburetor Body: #60P, FS-91 Surpass II
5 out of 5 Customer Rating
Carburetor Body: #60P, FS-91 Surpass II
$44.22
Carburetor Body: #60R Carburetor Body: #60R
4 out of 5 Customer Rating
Carburetor Body: #60R
$41.99
Carburetor Rotor: #75AX Carburetor Rotor: #75AX
4 out of 5 Customer Rating
Carburetor Rotor: #75AX
$11.34 Price reduced from $37.80 to
Clearance Sale! ⓘ
Connecting Rod: BGX-3500 Connecting Rod: BGX-3500
3.2 out of 5 Customer Rating
Connecting Rod: BGX-3500
$43.99
Drive Washer: 65AX Drive Washer: 65AX
5 out of 5 Customer Rating
Drive Washer: 65AX
$13.78
Cylinder Head: GGT10 Cylinder Head: GGT10
4.8 out of 5 Customer Rating
Cylinder Head: GGT10
$8.87 Price reduced from $29.55 to
Clearance Sale! ⓘ
Cylinder Liner: FR5 Cylinder Liner: FR5
4 out of 5 Customer Rating
Cylinder Liner: FR5
$15.79 Price reduced from $45.22 to
Clearance Sale! ⓘ
Collector Exhaust Pipe: IL-300 Dia Star Collector Exhaust Pipe: IL-300 Dia Star
5 out of 5 Customer Rating
Collector Exhaust Pipe: IL-300 Dia Star
$411.70
Piston Ring: FS-61 Piston Ring: FS-61
5 out of 5 Customer Rating
Piston Ring: FS-61
$26.24
Piston Ring: 60-61 Piston Ring: 60-61
3.2 out of 5 Customer Rating
Piston Ring: 60-61
$26.24
Valve Spring Seat: FS-95V Valve Spring Seat: FS-95V
4.4 out of 5 Customer Rating
Valve Spring Seat: FS-95V
$6.49
Valve Spring Seat: 56 FS Valve Spring Seat: 56 FS
4.8 out of 5 Customer Rating
Valve Spring Seat: 56 FS
$6.45
Connector Set: OMA-50 Connector Set: OMA-50
4 out of 5 Customer Rating
Connector Set: OMA-50
$15.99
Needle Valve Holder 61ER Needle Valve Holder 61ER
4 out of 5 Customer Rating
Needle Valve Holder 61ER
$11.80
Metering Needle 21M Metering Needle 21M
4.4 out of 5 Customer Rating
Metering Needle 21M
$19.14
105HZ-R DRS 1.05 Helicopter Engine 105HZ-R DRS 1.05 Helicopter Engine
4 out of 5 Customer Rating
105HZ-R DRS 1.05 Helicopter Engine
$722.99
Carburetor Reducer 6mm, Red: B2101 Speed Carburetor Reducer 6mm, Red: B2101 Speed
5 out of 5 Customer Rating
Carburetor Reducer 6mm, Red: B2101 Speed
$21.10
T-1070SC L52 Pipe Set T-1070SC L52 Pipe Set
4.4 out of 5 Customer Rating
T-1070SC L52 Pipe Set
$190.29
Rear Bearing: 19XZ-B Speed Rear Bearing: 19XZ-B Speed
4.8 out of 5 Customer Rating
Rear Bearing: 19XZ-B Speed
$109.38
Carburetor Body: 21M Carburetor Body: 21M
4.8 out of 5 Customer Rating
Carburetor Body: 21M
$26.16 Price reduced from $87.21 to
Clearance Sale! ⓘ
Cover Plate: T1201 Speed Cover Plate: T1201 Speed
5 out of 5 Customer Rating
Cover Plate: T1201 Speed
$6.32 Price reduced from $21.08 to
Clearance Sale! ⓘ
Outer Head: 12XZ Speed Spec 3 Outer Head: 12XZ Speed Spec 3
5 out of 5 Customer Rating
Outer Head: 12XZ Speed Spec 3
$92.99
Needle Metering 21M: 21XZ-R VII Needle Metering 21M: 21XZ-R VII
5 out of 5 Customer Rating
Needle Metering 21M: 21XZ-R VII
$17.99
Crankshaft O.S. Speed T1204 Crankshaft O.S. Speed T1204
4.6 out of 5 Customer Rating
Crankshaft O.S. Speed T1204
$126.49
O.S. Carburetor 22E (B) Without Reducer Type R O.S. Carburetor 22E (B) Without Reducer Type R
4.2 out of 5 Customer Rating
O.S. Carburetor 22E (B) Without Reducer Type R
$162.83
M2000SC 75mm Exhaust Manifold M2000SC 75mm Exhaust Manifold
3.4 out of 5 Customer Rating
M2000SC 75mm Exhaust Manifold
$63.18
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