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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49-96 of 1,758 Results
Cylinder Head: 21XM V2 Outboard Marine Cylinder Head: 21XM V2 Outboard Marine
4 out of 5 Customer Rating
Cylinder Head: 21XM V2 Outboard Marine
$91.34
Lower Unit: 21XM Lower Unit: 21XM
4.8 out of 5 Customer Rating
Lower Unit: 21XM
$100.94
Marine Head Assembly: 18CVR-M Marine Head Assembly: 18CVR-M
4.8 out of 5 Customer Rating
Marine Head Assembly: 18CVR-M
$14.49 Price reduced from $48.30 to
Clearance Sale! ⓘ
Needle Assembly 21-120 Needle Assembly 21-120
5 out of 5 Customer Rating
Needle Assembly 21-120
$22.04
Flex Shaft: 21XM Flex Shaft: 21XM
4.4 out of 5 Customer Rating
Flex Shaft: 21XM
$8.09 Price reduced from $25.20 to
Clearance Sale! ⓘ
Front Bearing: 21RZ-B Front Bearing: 21RZ-B
4.2 out of 5 Customer Rating
Front Bearing: 21RZ-B
$27.29
Crankcase: 18CV-R Crankcase: 18CV-R
3.4 out of 5 Customer Rating
Crankcase: 18CV-R
$52.52
Carburetor #20J: 21XM, 21RG-M Carburetor #20J: 21XM, 21RG-M
4.1 out of 5 Customer Rating
Carburetor #20J: 21XM, 21RG-M
$147.07
Muffler: E2050-2, 21XM, V2 Outboard Marine Muffler: E2050-2, 21XM, V2 Outboard Marine
4 out of 5 Customer Rating
Muffler: E2050-2, 21XM, V2 Outboard Marine
$87.29
Cylinder & Piston: O.S. SPEED R21 EURO Cylinder & Piston: O.S. SPEED R21 EURO
5 out of 5 Customer Rating
Cylinder & Piston: O.S. SPEED R21 EURO
$249.99
O-Ring Set #60B O-Ring Set #60B
5 out of 5 Customer Rating
O-Ring Set #60B
$2.53 Price reduced from $8.43 to
Clearance Sale! ⓘ
Cavitation Plt: 21XM Cavitation Plt: 21XM
4.2 out of 5 Customer Rating
Cavitation Plt: 21XM
$22.24
Needle Assembly #40A Needle Assembly #40A
4 out of 5 Customer Rating
Needle Assembly #40A
$22.04
Lower Arm: 21XM Lower Arm: 21XM
4.1 out of 5 Customer Rating
Lower Arm: 21XM
$21.06
Cylinder Head: 21XZ-M Inboard Marine Cylinder Head: 21XZ-M Inboard Marine
4.1 out of 5 Customer Rating
Cylinder Head: 21XZ-M Inboard Marine
$72.99
Gasket Cover: 21XM V2 Outboard Marine Gasket Cover: 21XM V2 Outboard Marine
5 out of 5 Customer Rating
Gasket Cover: 21XM V2 Outboard Marine
$6.49
Rear Housing: 21XM Rear Housing: 21XM
4.7 out of 5 Customer Rating
Rear Housing: 21XM
$52.65
Outboard Unit Assembly: 21XM V2 Outboard Marine Outboard Unit Assembly: 21XM V2 Outboard Marine
5 out of 5 Customer Rating
Outboard Unit Assembly: 21XM V2 Outboard Marine
$270.99
Front Bearing: 11PS Front Bearing: 11PS
3.1 out of 5 Customer Rating
Front Bearing: 11PS
$22.04
Carburetor Body: #40A Carburetor Body: #40A
5 out of 5 Customer Rating
Carburetor Body: #40A
$47.99
Cylinder & Piston Assembly: 21XZ-R Cylinder & Piston Assembly: 21XZ-R
4.1 out of 5 Customer Rating
Cylinder & Piston Assembly: 21XZ-R
$188.33
Cylinder & Piston Assembly: 21XM V2 Outboard Marine Cylinder & Piston Assembly: 21XM V2 Outboard Marine
4.1 out of 5 Customer Rating
Cylinder & Piston Assembly: 21XM V2 Outboard Marine
$155.31
Carburetor Retainer: 30VG Carburetor Retainer: 30VG
5 out of 5 Customer Rating
Carburetor Retainer: 30VG
$13.78
Crankshaft: 21XM V2 Outboard Marine Crankshaft: 21XM V2 Outboard Marine
5 out of 5 Customer Rating
Crankshaft: 21XM V2 Outboard Marine
$130.94
Crankshaft: 21XZ-M Inboard Marine Crankshaft: 21XZ-M Inboard Marine
5 out of 5 Customer Rating
Crankshaft: 21XZ-M Inboard Marine
$149.99
Cylinder Rebuild Kit: O.S. SPEED R21 EURO Cylinder Rebuild Kit: O.S. SPEED R21 EURO
4.7 out of 5 Customer Rating
Cylinder Rebuild Kit: O.S. SPEED R21 EURO
$251.47
Inner Head: 21XZ-R Inner Head: 21XZ-R
5 out of 5 Customer Rating
Inner Head: 21XZ-R
$52.69
Screw Set (10): 21XM Screw Set (10): 21XM
5 out of 5 Customer Rating
Screw Set (10): 21XM
$11.75
Prop Nut: 21XM Prop Nut: 21XM
3.9 out of 5 Customer Rating
Prop Nut: 21XM
$6.49
42mm Carbon Fiber Propeller: 21XM 42mm Carbon Fiber Propeller: 21XM
5 out of 5 Customer Rating
42mm Carbon Fiber Propeller: 21XM
$20.05
Prop Shaft: 21XM Prop Shaft: 21XM
5 out of 5 Customer Rating
Prop Shaft: 21XM
$57.74
Rotor Guide Screw #20J Rotor Guide Screw #20J
5 out of 5 Customer Rating
Rotor Guide Screw #20J
$6.49
Rotor Spring #4B #4D #4C Rotor Spring #4B #4D #4C
4.1 out of 5 Customer Rating
Rotor Spring #4B #4D #4C
$6.49
Screw Set CZ-MX (8) Screw Set CZ-MX (8)
4.7 out of 5 Customer Rating
Screw Set CZ-MX (8)
$7.46
Steering Arm: 21XM Steering Arm: 21XM
4.7 out of 5 Customer Rating
Steering Arm: 21XM
$13.75
Side Plate: 21XM Side Plate: 21XM
3.3 out of 5 Customer Rating
Side Plate: 21XM
$22.24
Speed P3 Gold Ultra Hot Plug Speed P3 Gold Ultra Hot Plug
5 out of 5 Customer Rating
Speed P3 Gold Ultra Hot Plug
$16.99
#8 Glow Plug Long Medium Air Car #8 Glow Plug Long Medium Air Car
4.1 out of 5 Customer Rating
#8 Glow Plug Long Medium Air Car
$11.99
LC4 T-Maxx Revo Plug Medium LC4 T-Maxx Revo Plug Medium
4 out of 5 Customer Rating
LC4 T-Maxx Revo Plug Medium
$11.99
O-Ring Small #2K IFN O-Ring Small #2K IFN
5 out of 5 Customer Rating
O-Ring Small #2K IFN
$6.49
Carburetor: #11K Slide, 18TZ, 21TM Carburetor: #11K Slide, 18TZ, 21TM
3.3 out of 5 Customer Rating
Carburetor: #11K Slide, 18TZ, 21TM
$96.66
Cylinder Liner: 105HZ Cylinder Liner: 105HZ
5 out of 5 Customer Rating
Cylinder Liner: 105HZ
$105.05
Piston: 105HZ Piston: 105HZ
5 out of 5 Customer Rating
Piston: 105HZ
$92.46
Woodruff Key: 120-240 Woodruff Key: 120-240
4.4 out of 5 Customer Rating
Woodruff Key: 120-240
$6.45
Piston Pin: 21XZ-R Piston Pin: 21XZ-R
4.1 out of 5 Customer Rating
Piston Pin: 21XZ-R
$9.85
Cylinder Head: 95AX Cylinder Head: 95AX
3.4 out of 5 Customer Rating
Cylinder Head: 95AX
$48.41
Silencer E3080: 35AX Silencer E3080: 35AX
5 out of 5 Customer Rating
Silencer E3080: 35AX
$34.86
Piston: 37SZ-H Piston: 37SZ-H
3.6 out of 5 Customer Rating
Piston: 37SZ-H
$32.56
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