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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462-509 of 1,758 Results
Carburetor Body: 12F2-B, Speed T1202 Carburetor Body: 12F2-B, Speed T1202
4.5 out of 5 Customer Rating
Carburetor Body: 12F2-B, Speed T1202
$15.78 Price reduced from $52.61 to
Clearance Sale! ⓘ
Cover Plate: 25XZ Cover Plate: 25XZ
5 out of 5 Customer Rating
Cover Plate: 25XZ
$21.28
Outer Head: 28XZ Outer Head: 28XZ
3.7 out of 5 Customer Rating
Outer Head: 28XZ
$102.52
Outer Head: 21XZ-B Spec 2 Outer Head: 21XZ-B Spec 2
3.7 out of 5 Customer Rating
Outer Head: 21XZ-B Spec 2
$125.67
Needle #20E Needle #20E
4.5 out of 5 Customer Rating
Needle #20E
$13.78
Inner Head: 12XZ Speed Spec II Inner Head: 12XZ Speed Spec II
5 out of 5 Customer Rating
Inner Head: 12XZ Speed Spec II
$30.99
Piston Pin: 15RX Piston Pin: 15RX
4.1 out of 5 Customer Rating
Piston Pin: 15RX
$6.29
Rear Bearing: FS-61 Rear Bearing: FS-61
3.4 out of 5 Customer Rating
Rear Bearing: FS-61
$26.34
Cam Follower: 91-300 Cam Follower: 91-300
5 out of 5 Customer Rating
Cam Follower: 91-300
$22.04
Camshaft: FS-120 II Camshaft: FS-120 II
5 out of 5 Customer Rating
Camshaft: FS-120 II
$66.15
Carburetor Body: #60F Carburetor Body: #60F
5 out of 5 Customer Rating
Carburetor Body: #60F
$37.80
Carburetor Rotor: 40K, 46AXII Carburetor Rotor: 40K, 46AXII
5 out of 5 Customer Rating
Carburetor Rotor: 40K, 46AXII
$33.61
Cylinder Head: .25AX Cylinder Head: .25AX
5 out of 5 Customer Rating
Cylinder Head: .25AX
$19.99
Gasket Set: 37SZ-H Gasket Set: 37SZ-H
3.6 out of 5 Customer Rating
Gasket Set: 37SZ-H
$10.94
Gasket Head: 65AX Gasket Head: 65AX
4.4 out of 5 Customer Rating
Gasket Head: 65AX
$6.49
Rocker Cover: FS-120 III Rocker Cover: FS-120 III
3.6 out of 5 Customer Rating
Rocker Cover: FS-120 III
$21.10
Screw Set (12): FS-91 Surpass Screw Set (12): FS-91 Surpass
4.4 out of 5 Customer Rating
Screw Set (12): FS-91 Surpass
$17.08
Plug Terminal: Sirius 7 Plug Terminal: Sirius 7
4.2 out of 5 Customer Rating
Plug Terminal: Sirius 7
$10.94
Carburetor Rotor: #60J Carburetor Rotor: #60J
4.4 out of 5 Customer Rating
Carburetor Rotor: #60J
$13.78
Cover Plate: FS-95V Cover Plate: FS-95V
3.4 out of 5 Customer Rating
Cover Plate: FS-95V
$21.17
Crankcase: 15LA Natural Crankcase: 15LA Natural
4.8 out of 5 Customer Rating
Crankcase: 15LA Natural
$29.49
Crankcase: 120AX Crankcase: 120AX
5 out of 5 Customer Rating
Crankcase: 120AX
$135.55
Crankcase: GT15HZ Crankcase: GT15HZ
4.8 out of 5 Customer Rating
Crankcase: GT15HZ
$190.29
Cylinder Head: Sirius 7 Cylinder Head: Sirius 7
4.8 out of 5 Customer Rating
Cylinder Head: Sirius 7
$97.71
Head Gasket .4 Aluminum: Sirius 7 Head Gasket .4 Aluminum: Sirius 7
5 out of 5 Customer Rating
Head Gasket .4 Aluminum: Sirius 7
$6.49
90 Degree Muffler Extension Screws (2): 120AX 90 Degree Muffler Extension Screws (2): 120AX
3.6 out of 5 Customer Rating
90 Degree Muffler Extension Screws (2): 120AX
$6.49
Needle #86 #8H Needle #86 #8H
4.8 out of 5 Customer Rating
Needle #86 #8H
$13.78
Pushrod: FS-95V Pushrod: FS-95V
4.2 out of 5 Customer Rating
Pushrod: FS-95V
$10.49
Motor Mount: OMA-50 Series Motor Mount: OMA-50 Series
5 out of 5 Customer Rating
Motor Mount: OMA-50 Series
$19.99
Dust Cap Set, 10mm (3) Dust Cap Set, 10mm (3)
4.4 out of 5 Customer Rating
Dust Cap Set, 10mm (3)
$2.96 Price reduced from $9.85 to
Clearance Sale! ⓘ
Cover Plate: O.S. Speed B2104 Cover Plate: O.S. Speed B2104
4.2 out of 5 Customer Rating
Cover Plate: O.S. Speed B2104
$10.50 Price reduced from $28.35 to
Clearance Sale! ⓘ
Cylinder & Piston Speed: T1202 Cylinder & Piston Speed: T1202
4 out of 5 Customer Rating
Cylinder & Piston Speed: T1202
$127.43
Outer Head: 19XZ-B Speed Outer Head: 19XZ-B Speed
5 out of 5 Customer Rating
Outer Head: 19XZ-B Speed
$102.20
Inner Head: 21XZ-B Spec 2 Inner Head: 21XZ-B Spec 2
4.8 out of 5 Customer Rating
Inner Head: 21XZ-B Spec 2
$57.96
Slide Valve 21M Slide Valve 21M
5 out of 5 Customer Rating
Slide Valve 21M
$9.77 Price reduced from $32.56 to
Clearance Sale! ⓘ
Bearing Rear: 65AX Bearing Rear: 65AX
5 out of 5 Customer Rating
Bearing Rear: 65AX
$22.16
Cam Holder: Sirius 7 Cam Holder: Sirius 7
5 out of 5 Customer Rating
Cam Holder: Sirius 7
$48.41
Cover Plate: 56 FS Cover Plate: 56 FS
3.7 out of 5 Customer Rating
Cover Plate: 56 FS
$15.76
Cover Plate: 91SZ-H Cover Plate: 91SZ-H
5 out of 5 Customer Rating
Cover Plate: 91SZ-H
$20.99
Crankshaft: 25AX Crankshaft: 25AX
3.3 out of 5 Customer Rating
Crankshaft: 25AX
$43.99
Cylinder Head: FS81 Alpha Cylinder Head: FS81 Alpha
5 out of 5 Customer Rating
Cylinder Head: FS81 Alpha
$76.86
Cylinder Liner: 140RX Cylinder Liner: 140RX
5 out of 5 Customer Rating
Cylinder Liner: 140RX
$31.80 Price reduced from $106.01 to
Clearance Sale! ⓘ
Drive Hub: 140RX Drive Hub: 140RX
5 out of 5 Customer Rating
Drive Hub: 140RX
$26.24
Drive Spacer: GT60 Drive Spacer: GT60
5 out of 5 Customer Rating
Drive Spacer: GT60
$38.03
Muffler Assembly Screw: 75AX Muffler Assembly Screw: 75AX
5 out of 5 Customer Rating
Muffler Assembly Screw: 75AX
$2.53 Price reduced from $8.43 to
Clearance Sale! ⓘ
Piston: GF30 Piston: GF30
4.7 out of 5 Customer Rating
Piston: GF30
$17.36 Price reduced from $57.86 to
Clearance Sale! ⓘ
Piston Pin: 25F FP Piston Pin: 25F FP
3.3 out of 5 Customer Rating
Piston Pin: 25F FP
$9.85
Piston Pin: 40 46VFR Piston Pin: 40 46VFR
5 out of 5 Customer Rating
Piston Pin: 40 46VFR
$9.85
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