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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45-68 of 1,605 Results
Crankcase: 21XM Crankcase: 21XM
3.4 out of 5 Customer Rating
Crankcase: 21XM
$125.10
Inner Head: 21XZ-R Inner Head: 21XZ-R
5 out of 5 Customer Rating
Inner Head: 21XZ-R
$52.69
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
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! ⓘ
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
Carburetor Body: #40A Carburetor Body: #40A
5 out of 5 Customer Rating
Carburetor Body: #40A
$47.99
Cavitation Plt: 21XM Cavitation Plt: 21XM
4.2 out of 5 Customer Rating
Cavitation Plt: 21XM
$22.24
Lower Unit: 21XM Lower Unit: 21XM
4.8 out of 5 Customer Rating
Lower Unit: 21XM
$100.94
Rear Board Unit Fixing Screw: 21XM V2 Outboard Rear Board Unit Fixing Screw: 21XM V2 Outboard
5 out of 5 Customer Rating
Rear Board Unit Fixing Screw: 21XM V2 Outboard
$10.86
Carburetor #20J: 21XM, 21RG-M Carburetor #20J: 21XM, 21RG-M
4.1 out of 5 Customer Rating
Carburetor #20J: 21XM, 21RG-M
$147.07
Lower Arm: 21XM Lower Arm: 21XM
4.1 out of 5 Customer Rating
Lower Arm: 21XM
$21.06
42mm Carbon Fiber Propeller: 21XM 42mm Carbon Fiber Propeller: 21XM
5 out of 5 Customer Rating
42mm Carbon Fiber Propeller: 21XM
$20.05
Front Bearing: 11PS Front Bearing: 11PS
3.1 out of 5 Customer Rating
Front Bearing: 11PS
$22.04
Carburetor Retainer: 30VG Carburetor Retainer: 30VG
5 out of 5 Customer Rating
Carburetor Retainer: 30VG
$13.78
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
Flex Shaft Assembl:y 21XM Flex Shaft Assembl:y 21XM
5 out of 5 Customer Rating
Flex Shaft Assembl:y 21XM
$29.46
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
Crankcase: 18CV-R Crankcase: 18CV-R
3.4 out of 5 Customer Rating
Crankcase: 18CV-R
$52.52
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
Needle Assembly 21-120 Needle Assembly 21-120
5 out of 5 Customer Rating
Needle Assembly 21-120
$22.04
Needle #4BK #2K Needle #4BK #2K
3.4 out of 5 Customer Rating
Needle #4BK #2K
$13.78
Throttle Lever #4BK #4C Throttle Lever #4BK #4C
4.8 out of 5 Customer Rating
Throttle Lever #4BK #4C
$8.49
Needle Assembly #40A Needle Assembly #40A
4 out of 5 Customer Rating
Needle Assembly #40A
$22.04
Screw Set (10): 21XM Screw Set (10): 21XM
5 out of 5 Customer Rating
Screw Set (10): 21XM
$11.75
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