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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1,129-1,152 of 1,755 Results
Valve Assembly Exhaust: FS-120 Surpass Valve Assembly Exhaust: FS-120 Surpass
5 out of 5 Customer Rating
Valve Assembly Exhaust: FS-120 Surpass
$44.10
Valve Spring: GF40 Valve Spring: GF40
5 out of 5 Customer Rating
Valve Spring: GF40
$9.46
Muffler Extension: #762 Muffler Extension: #762
3.3 out of 5 Customer Rating
Muffler Extension: #762
$16.09
Carburetor: #80N, FS200S Carburetor: #80N, FS200S
4.7 out of 5 Customer Rating
Carburetor: #80N, FS200S
$97.90
Carburetor Reducer 8mm, Red: 21VZB (P) V-Spec Carburetor Reducer 8mm, Red: 21VZB (P) V-Spec
3.7 out of 5 Customer Rating
Carburetor Reducer 8mm, Red: 21VZB (P) V-Spec
$11.80
Exhaust Header Pipe M1021: 21TM Exhaust Header Pipe M1021: 21TM
3.7 out of 5 Customer Rating
Exhaust Header Pipe M1021: 21TM
$48.55
Carburetor: #11G Slide, 18CVR Carburetor: #11G Slide, 18CVR
3.3 out of 5 Customer Rating
Carburetor: #11G Slide, 18CVR
$87.29
Crankcase: 21XR-B Version II Crankcase: 21XR-B Version II
4.5 out of 5 Customer Rating
Crankcase: 21XR-B Version II
$71.54
O.S. Outer Head Speed B2103 Type R O.S. Outer Head Speed B2103 Type R
5 out of 5 Customer Rating
O.S. Outer Head Speed B2103 Type R
$102.47
T-2100SC Tuned Pipe T-2100SC Tuned Pipe
3.3 out of 5 Customer Rating
T-2100SC Tuned Pipe
$152.41
Crankcase: 25LA Natural Crankcase: 25LA Natural
5 out of 5 Customer Rating
Crankcase: 25LA Natural
$34.86
Crankcase: 21XZ-B Speed Crankcase: 21XZ-B Speed
5 out of 5 Customer Rating
Crankcase: 21XZ-B Speed
$139.99
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 Assembly: 28XZ Cylinder & Piston Assembly: 28XZ
4.1 out of 5 Customer Rating
Cylinder & Piston Assembly: 28XZ
$176.55
Drive Washer: 12TR Drive Washer: 12TR
3.3 out of 5 Customer Rating
Drive Washer: 12TR
$7.46
Mixture Control Screw: 120 Surpass Mixture Control Screw: 120 Surpass
5 out of 5 Customer Rating
Mixture Control Screw: 120 Surpass
$6.49
Needle High Speed WLA-2: GT55 Needle High Speed WLA-2: GT55
3.1 out of 5 Customer Rating
Needle High Speed WLA-2: GT55
$15.99
Metering Needle 12F2: 12XZ Speed Spec Metering Needle 12F2: 12XZ Speed Spec
4.7 out of 5 Customer Rating
Metering Needle 12F2: 12XZ Speed Spec
$5.74 Price reduced from $19.14 to
Clearance Sale! ⓘ
Carburetor Body: #20H Carburetor Body: #20H
3.7 out of 5 Customer Rating
Carburetor Body: #20H
$19.14
Carburetor Insert: #9B Carburetor Insert: #9B
4.1 out of 5 Customer Rating
Carburetor Insert: #9B
$7.99
Carburetor Rotor: 40L, 55HZ Hyper Carburetor Rotor: 40L, 55HZ Hyper
3.7 out of 5 Customer Rating
Carburetor Rotor: 40L, 55HZ Hyper
$39.91
Choke Valve: 120-300 Choke Valve: 120-300
4.7 out of 5 Customer Rating
Choke Valve: 120-300
$31.52
Cover Plate: FS155A-P Cover Plate: FS155A-P
5 out of 5 Customer Rating
Cover Plate: FS155A-P
$22.04
Crankshaft: 15LA Crankshaft: 15LA
5 out of 5 Customer Rating
Crankshaft: 15LA
$23.22
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