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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193-216 of 1,812 Results
Carburetor Body: 21JN Carburetor Body: 21JN
3.7 out of 5 Customer Rating
Carburetor Body: 21JN
$79.99
Cover Plate: FS-120 III Cover Plate: FS-120 III
4.5 out of 5 Customer Rating
Cover Plate: FS-120 III
$21.10
Cover Plate: FS-200S-P Cover Plate: FS-200S-P
4.1 out of 5 Customer Rating
Cover Plate: FS-200S-P
$25.44
Crankcase: 25LA Natural Crankcase: 25LA Natural
5 out of 5 Customer Rating
Crankcase: 25LA Natural
$34.86
Cylinder & Piston Assembly: 55AX Cylinder & Piston Assembly: 55AX
5 out of 5 Customer Rating
Cylinder & Piston Assembly: 55AX
$104.95
O.S. Built-Up Parts Set Cyl Piston OS Speed R21GT O.S. Built-Up Parts Set Cyl Piston OS Speed R21GT
3.3 out of 5 Customer Rating
O.S. Built-Up Parts Set Cyl Piston OS Speed R21GT
$298.61
Carburetor 12F2-B: 12XZ Speed Spec 3 Carburetor 12F2-B: 12XZ Speed Spec 3
3.7 out of 5 Customer Rating
Carburetor 12F2-B: 12XZ Speed Spec 3
$118.99
Carburetor 40L-R: 55HZ-R Carburetor 40L-R: 55HZ-R
5 out of 5 Customer Rating
Carburetor 40L-R: 55HZ-R
$260.43
Carburetor #20C: 32SX-H HX Carburetor #20C: 32SX-H HX
3.3 out of 5 Customer Rating
Carburetor #20C: 32SX-H HX
$71.61
Crankshaft Bearing, Front: FS-91 Crankshaft Bearing, Front: FS-91
5 out of 5 Customer Rating
Crankshaft Bearing, Front: FS-91
$26.34
Carburetor Body: 22C(B), Speed B2102 Carburetor Body: 22C(B), Speed B2102
4.7 out of 5 Customer Rating
Carburetor Body: 22C(B), Speed B2102
$87.19
Rear Bearing: GT33 Rear Bearing: GT33
5 out of 5 Customer Rating
Rear Bearing: GT33
$30.44
O.S. Carburetor Body 22D (B) Speed B2103 Type S O.S. Carburetor Body 22D (B) Speed B2103 Type S
4.1 out of 5 Customer Rating
O.S. Carburetor Body 22D (B) Speed B2103 Type S
$87.19
Cylinder Rebuild Kit: 21XR-B Cylinder Rebuild Kit: 21XR-B
4.1 out of 5 Customer Rating
Cylinder Rebuild Kit: 21XR-B
$149.93
Cylinder & Piston: 12TR (P)-T Cylinder & Piston: 12TR (P)-T
5 out of 5 Customer Rating
Cylinder & Piston: 12TR (P)-T
$75.99
Cylinder & Piston: 21XZ-GT Speed Cylinder & Piston: 21XZ-GT Speed
4.1 out of 5 Customer Rating
Cylinder & Piston: 21XZ-GT Speed
$177.63
Inner Head: speed 21XZ-B Spec III Inner Head: speed 21XZ-B Spec III
3.3 out of 5 Customer Rating
Inner Head: speed 21XZ-B Spec III
$52.69
Heat Sink Head: 30VG Heat Sink Head: 30VG
3.1 out of 5 Customer Rating
Heat Sink Head: 30VG
$91.34
202 Elements (4) 202 Elements (4)
5 out of 5 Customer Rating
202 Elements (4)
$13.78
Carburetor Reducer 9mm, Red: Speed 21 V-Spec Carburetor Reducer 9mm, Red: Speed 21 V-Spec
4.1 out of 5 Customer Rating
Carburetor Reducer 9mm, Red: Speed 21 V-Spec
$21.10
Carburetor Reducer 8.5mm, Purple: 21M Carburetor Reducer 8.5mm, Purple: 21M
5 out of 5 Customer Rating
Carburetor Reducer 8.5mm, Purple: 21M
$21.10
Carburetor: 61B-PII 91HZ-PSII Carburetor: 61B-PII 91HZ-PSII
5 out of 5 Customer Rating
Carburetor: 61B-PII 91HZ-PSII
$86.14 Price reduced from $226.99 to
Clearance Sale! ⓘ
Front Ball Bearing: 40, 46, 48 Front Ball Bearing: 40, 46, 48
3.7 out of 5 Customer Rating
Front Ball Bearing: 40, 46, 48
$21.17
Front Bearing: 40-240 Front Bearing: 40-240
4.2 out of 5 Customer Rating
Front Bearing: 40-240
$21.17
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