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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990-1,037 of 1,758 Results
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
Crankcase: 21XZ-R Speed Crankcase: 21XZ-R Speed
5 out of 5 Customer Rating
Crankcase: 21XZ-R Speed
$157.24
Crankshaft: 19XZ-B Speed Crankshaft: 19XZ-B Speed
4.8 out of 5 Customer Rating
Crankshaft: 19XZ-B Speed
$52.61 Price reduced from $175.75 to
Clearance Sale! ⓘ
O.S. Cylindr & Piston Assy OS Speed R21GT O.S. Cylindr & Piston Assy OS Speed R21GT
4.4 out of 5 Customer Rating
O.S. Cylindr & Piston Assy OS Speed R21GT
$69.66 Price reduced from $232.21 to
Clearance Sale! ⓘ
Outer Head O.S. Speed T1204 Outer Head O.S. Speed T1204
3.8 out of 5 Customer Rating
Outer Head O.S. Speed T1204
$89.99
Carburetor 22B2: 21XZ-B V2 Carburetor 22B2: 21XZ-B V2
5 out of 5 Customer Rating
Carburetor 22B2: 21XZ-B V2
$129.99
Carburetor 12D2: 12TG VII Carburetor 12D2: 12TG VII
5 out of 5 Customer Rating
Carburetor 12D2: 12TG VII
$135.44
Connecting Rod: 30VG Connecting Rod: 30VG
5 out of 5 Customer Rating
Connecting Rod: 30VG
$27.48
Cylinder Rebuild Kit: 21XZ-B Spec 2 Cylinder Rebuild Kit: 21XZ-B Spec 2
4 out of 5 Customer Rating
Cylinder Rebuild Kit: 21XZ-B Spec 2
$254.73
Outer Head: R21 Outer Head: R21
3.6 out of 5 Customer Rating
Outer Head: R21
$29.05 Price reduced from $96.84 to
Clearance Sale! ⓘ
Inner Head: B2101 Speed Inner Head: B2101 Speed
4.4 out of 5 Customer Rating
Inner Head: B2101 Speed
$57.96
Dust Cap Set: RZ-V P Dust Cap Set: RZ-V P
5 out of 5 Customer Rating
Dust Cap Set: RZ-V P
$7.46
Mixture Control Screw #11L Mixture Control Screw #11L
5 out of 5 Customer Rating
Mixture Control Screw #11L
$11.80
Slide Valve 12F2: 12XZ Speed Spec 3 Slide Valve 12F2: 12XZ Speed Spec 3
4 out of 5 Customer Rating
Slide Valve 12F2: 12XZ Speed Spec 3
$10.08 Price reduced from $33.61 to
Clearance Sale! ⓘ
Starting Shaft: 30VG ES Starting Shaft: 30VG ES
5 out of 5 Customer Rating
Starting Shaft: 30VG ES
$22.30
Cylinder & Piston Assembly O.S. Speed R2106 Cylinder & Piston Assembly O.S. Speed R2106
5 out of 5 Customer Rating
Cylinder & Piston Assembly O.S. Speed R2106
$204.99
Carburetor 61HB: GGT10 Gasoline Engine Carburetor 61HB: GGT10 Gasoline Engine
5 out of 5 Customer Rating
Carburetor 61HB: GGT10 Gasoline Engine
$147.01
Muffler Extension Adapter E-3070: 873 Muffler Extension Adapter E-3070: 873
5 out of 5 Customer Rating
Muffler Extension Adapter E-3070: 873
$19.05
OCA-240 40-Amp 25V ESC with OCP-2 Programming Card OCA-240 40-Amp 25V ESC with OCP-2 Programming Card
3.7 out of 5 Customer Rating
OCA-240 40-Amp 25V ESC with OCP-2 Programming Card
$109.99
Cam Cover: FS-120 Surpass Cam Cover: FS-120 Surpass
4.1 out of 5 Customer Rating
Cam Cover: FS-120 Surpass
$10.86
Carburetor Body: 61ER Carburetor Body: 61ER
5 out of 5 Customer Rating
Carburetor Body: 61ER
$29.36 Price reduced from $97.88 to
Clearance Sale! ⓘ
Carburetor Body: #80R, FS-200S-P Carburetor Body: #80R, FS-200S-P
3.3 out of 5 Customer Rating
Carburetor Body: #80R, FS-200S-P
$97.90
Carburetor Rotor: 60PS, FS-95V Carburetor Rotor: 60PS, FS-95V
5 out of 5 Customer Rating
Carburetor Rotor: 60PS, FS-95V
$30.44
Cover Plate: FSa-72II Cover Plate: FSa-72II
5 out of 5 Customer Rating
Cover Plate: FSa-72II
$5.78 Price reduced from $19.25 to
Clearance Sale! ⓘ
Crankcase: 105HZ Crankcase: 105HZ
3.7 out of 5 Customer Rating
Crankcase: 105HZ
$179.68
Crankshaft: 35-40FP Crankshaft: 35-40FP
4.1 out of 5 Customer Rating
Crankshaft: 35-40FP
$28.68
Crankshaft: GT15 Crankshaft: GT15
3.3 out of 5 Customer Rating
Crankshaft: GT15
$22.49 Price reduced from $74.96 to
Clearance Sale! ⓘ
Cylinder Liner: GF30 Cylinder Liner: GF30
4.7 out of 5 Customer Rating
Cylinder Liner: GF30
$17.71 Price reduced from $59.03 to
Clearance Sale! ⓘ
Cylinder Liner: GGT10 Cylinder Liner: GGT10
5 out of 5 Customer Rating
Cylinder Liner: GGT10
$64.22
Lock Cone: 40P/60GP Lock Cone: 40P/60GP
4.7 out of 5 Customer Rating
Lock Cone: 40P/60GP
$26.24
Silencer Body F-5030: FS81 Alpha Silencer Body F-5030: FS81 Alpha
5 out of 5 Customer Rating
Silencer Body F-5030: FS81 Alpha
$48.51
Silencer E-4040: GT15 75AX 95AX Silencer E-4040: GT15 75AX 95AX
3.3 out of 5 Customer Rating
Silencer E-4040: GT15 75AX 95AX
$51.64
Piston Ring: FS-120 III Piston Ring: FS-120 III
5 out of 5 Customer Rating
Piston Ring: FS-120 III
$32.56
Spark Plug CM6: GT-55 Spark Plug CM6: GT-55
4.1 out of 5 Customer Rating
Spark Plug CM6: GT-55
$26.99
Prop Locknut FF-240 320 Prop Locknut FF-240 320
5 out of 5 Customer Rating
Prop Locknut FF-240 320
$41.12
Ratchet Spring #7H #7D #2K Ratchet Spring #7H #7D #2K
4.1 out of 5 Customer Rating
Ratchet Spring #7H #7D #2K
$6.49
Intake Valve: 200 Surpass Intake Valve: 200 Surpass
3.7 out of 5 Customer Rating
Intake Valve: 200 Surpass
$13.26 Price reduced from $44.22 to
Clearance Sale! ⓘ
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