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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30-77 of 1,758 Results
Flex Shaft Housing: 21XM Flex Shaft Housing: 21XM
3.6 out of 5 Customer Rating
Flex Shaft Housing: 21XM
$10.86
Arm Shaft Assembly: 21XM Arm Shaft Assembly: 21XM
3.9 out of 5 Customer Rating
Arm Shaft Assembly: 21XM
$13.75
Mount Plate: 21XM Mount Plate: 21XM
3.7 out of 5 Customer Rating
Mount Plate: 21XM
$22.24
Gasket Head: 21XM V2 Outboard Marine Gasket Head: 21XM V2 Outboard Marine
4.7 out of 5 Customer Rating
Gasket Head: 21XM V2 Outboard Marine
$6.49
Throttle Link Assembly: 21XM Throttle Link Assembly: 21XM
3.3 out of 5 Customer Rating
Throttle Link Assembly: 21XM
$10.86
Drive Shaft Nut: 21XM Drive Shaft Nut: 21XM
4 out of 5 Customer Rating
Drive Shaft Nut: 21XM
$11.87
Throttle Lever #4BK #4C Throttle Lever #4BK #4C
4.8 out of 5 Customer Rating
Throttle Lever #4BK #4C
$8.49
Flywheel #2J Flywheel #2J
5 out of 5 Customer Rating
Flywheel #2J
$9.81 Price reduced from $31.50 to
Clearance Sale! ⓘ
Drive Shaft: 21XM Drive Shaft: 21XM
5 out of 5 Customer Rating
Drive Shaft: 21XM
$13.93 Price reduced from $46.43 to
Clearance Sale! ⓘ
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
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
Cylinder & Piston Assembly: 21XZ-R Cylinder & Piston Assembly: 21XZ-R
4.1 out of 5 Customer Rating
Cylinder & Piston Assembly: 21XZ-R
$188.33
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
Inner Head: 21XZ-R Inner Head: 21XZ-R
5 out of 5 Customer Rating
Inner Head: 21XZ-R
$52.69
Prop Nut: 21XM Prop Nut: 21XM
3.9 out of 5 Customer Rating
Prop Nut: 21XM
$6.49
Prop Shaft: 21XM Prop Shaft: 21XM
5 out of 5 Customer Rating
Prop Shaft: 21XM
$57.74
Connecting Rod: RXB/R/M Connecting Rod: RXB/R/M
4.4 out of 5 Customer Rating
Connecting Rod: RXB/R/M
$26.24
Flex Shaft Assembl:y 21XM Flex Shaft Assembl:y 21XM
5 out of 5 Customer Rating
Flex Shaft Assembl:y 21XM
$29.46
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
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! ⓘ
Flywheel Nut: 21XM Flywheel Nut: 21XM
4.4 out of 5 Customer Rating
Flywheel Nut: 21XM
$2.55 Price reduced from $8.49 to
Clearance Sale! ⓘ
RP7 Turbo Glow Plug Cold On-Road RP7 Turbo Glow Plug Cold On-Road
5 out of 5 Customer Rating
RP7 Turbo Glow Plug Cold On-Road
$14.99
Front Bearing: 21RZ-B Front Bearing: 21RZ-B
4.2 out of 5 Customer Rating
Front Bearing: 21RZ-B
$27.29
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
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
Crankcase: 21XM Crankcase: 21XM
3.4 out of 5 Customer Rating
Crankcase: 21XM
$125.10
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
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
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
Muffler Assembly Screws #E-2050 (4) Muffler Assembly Screws #E-2050 (4)
4.4 out of 5 Customer Rating
Muffler Assembly Screws #E-2050 (4)
$7.49
Needle #4BK #2K Needle #4BK #2K
3.4 out of 5 Customer Rating
Needle #4BK #2K
$13.78
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! ⓘ
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
Side Plate: 21XM Side Plate: 21XM
3.3 out of 5 Customer Rating
Side Plate: 21XM
$22.24
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
Low Unit Screw (4): 21XM Low Unit Screw (4): 21XM
3.6 out of 5 Customer Rating
Low Unit Screw (4): 21XM
$10.86
Lower Arm: 21XM Lower Arm: 21XM
4.1 out of 5 Customer Rating
Lower Arm: 21XM
$21.06
Rear Housing: 21XM Rear Housing: 21XM
4.7 out of 5 Customer Rating
Rear Housing: 21XM
$52.65
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