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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1,149-1,172 of 1,605 Results
Head Gasket: 21TM Head Gasket: 21TM
4 out of 5 Customer Rating
Head Gasket: 21TM
$9.74
Cylinder Piston Rod Set: O.S. Speed B2104 Cylinder Piston Rod Set: O.S. Speed B2104
3.4 out of 5 Customer Rating
Cylinder Piston Rod Set: O.S. Speed B2104
$242.95
Carburetor Retainer: 21EX-B, R Carburetor Retainer: 21EX-B, R
4 out of 5 Customer Rating
Carburetor Retainer: 21EX-B, R
$11.87
Crankcase: 21XZ-B Crankcase: 21XZ-B
4.8 out of 5 Customer Rating
Crankcase: 21XZ-B
$124.99
Cylinder Rebuild Kit: R2101 Speed Cylinder Rebuild Kit: R2101 Speed
5 out of 5 Customer Rating
Cylinder Rebuild Kit: R2101 Speed
$232.21
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
Air Filter: INS Air Filter: INS
3.4 out of 5 Customer Rating
Air Filter: INS
$40.99
Carb Reducer 5.5mm: #11H, #11HB, 12TZ Carb Reducer 5.5mm: #11H, #11HB, 12TZ
5 out of 5 Customer Rating
Carb Reducer 5.5mm: #11H, #11HB, 12TZ
$11.80
Carburetor Body: 21J3 Carburetor Body: 21J3
4 out of 5 Customer Rating
Carburetor Body: 21J3
$29.31 Price reduced from $97.70 to
Clearance Sale! ⓘ
Carburetor Rotor: #11J Carburetor Rotor: #11J
5 out of 5 Customer Rating
Carburetor Rotor: #11J
$29.60
Connecting Rod: Speed B2101, B2102 Connecting Rod: Speed B2101, B2102
4 out of 5 Customer Rating
Connecting Rod: Speed B2101, B2102
$52.58
Crankcase: 21XZ-B Ver2 Crankcase: 21XZ-B Ver2
4.2 out of 5 Customer Rating
Crankcase: 21XZ-B Ver2
$124.95
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
Gasket Head Aluminum, .2mm: 19XZ-B Speed Gasket Head Aluminum, .2mm: 19XZ-B Speed
5 out of 5 Customer Rating
Gasket Head Aluminum, .2mm: 19XZ-B Speed
$5.31
Thermo Insulator, 11K: 18TM Thermo Insulator, 11K: 18TM
4 out of 5 Customer Rating
Thermo Insulator, 11K: 18TM
$19.14
Gasket Head, .1 Brass: 21XZ-R Gasket Head, .1 Brass: 21XZ-R
3.6 out of 5 Customer Rating
Gasket Head, .1 Brass: 21XZ-R
$6.49
Rear Adapter: 18TM Rear Adapter: 18TM
3.2 out of 5 Customer Rating
Rear Adapter: 18TM
$19.05
Speed Flywheel Puller Speed Flywheel Puller
4 out of 5 Customer Rating
Speed Flywheel Puller
$48.34
Outer Head O.S. Speed R2106 Outer Head O.S. Speed R2106
3.7 out of 5 Customer Rating
Outer Head O.S. Speed R2106
$124.99
Heat Sink Head: 91SX-H Heat Sink Head: 91SX-H
5 out of 5 Customer Rating
Heat Sink Head: 91SX-H
$17.39 Price reduced from $57.99 to
Clearance Sale! ⓘ
Motor Mount: 15LA Motor Mount: 15LA
4.1 out of 5 Customer Rating
Motor Mount: 15LA
$22.26
Powerboost Pipe: III 50, 55HZ-H Powerboost Pipe: III 50, 55HZ-H
3.3 out of 5 Customer Rating
Powerboost Pipe: III 50, 55HZ-H
$184.86
Bearing Rear: 65AX Bearing Rear: 65AX
5 out of 5 Customer Rating
Bearing Rear: 65AX
$22.16
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