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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1,081-1,104 of 1,755 Results
Cylinder Rebuild Kit: 21XZ-B Spec 2 Cylinder Rebuild Kit: 21XZ-B Spec 2
4 out of 5 Customer Rating
Cylinder Rebuild Kit: 21XZ-B Spec 2
$254.73
Cylinder Piston Rod Rebuild Kit: R2103 Speed Cylinder Piston Rod Rebuild Kit: R2103 Speed
5 out of 5 Customer Rating
Cylinder Piston Rod Rebuild Kit: R2103 Speed
$253.61
Outer Head: R21 Outer Head: R21
3.6 out of 5 Customer Rating
Outer Head: R21
$96.84
Inner Head: B2101 Speed Inner Head: B2101 Speed
4.4 out of 5 Customer Rating
Inner Head: B2101 Speed
$57.96
Inner Head: 19XZ-B Speed Inner Head: 19XZ-B Speed
5 out of 5 Customer Rating
Inner Head: 19XZ-B Speed
$57.73
Dust Cap Set: RZ-V P Dust Cap Set: RZ-V P
5 out of 5 Customer Rating
Dust Cap Set: RZ-V P
$7.46
Screw Idle Speed WLA-2: GT55 Screw Idle Speed WLA-2: GT55
3.4 out of 5 Customer Rating
Screw Idle Speed WLA-2: GT55
$7.19 Price reduced from $23.99 to
Clearance Sale! ⓘ
Screw Set (8): 12CV-X Screw Set (8): 12CV-X
5 out of 5 Customer Rating
Screw Set (8): 12CV-X
$7.46
Starting Shaft: 30VG ES Starting Shaft: 30VG ES
5 out of 5 Customer Rating
Starting Shaft: 30VG ES
$22.30
Cylinder & Piston Assembly O.S. Speed R2106 Cylinder & Piston Assembly O.S. Speed R2106
5 out of 5 Customer Rating
Cylinder & Piston Assembly O.S. Speed R2106
$204.99
Diaphragm (PD-09): GF30 II Diaphragm (PD-09): GF30 II
4.5 out of 5 Customer Rating
Diaphragm (PD-09): GF30 II
$7.99
Carburetor #21K: 35AX Carburetor #21K: 35AX
4.5 out of 5 Customer Rating
Carburetor #21K: 35AX
$87.29
Carburetor 61HB: GGT10 Gasoline Engine Carburetor 61HB: GGT10 Gasoline Engine
5 out of 5 Customer Rating
Carburetor 61HB: GGT10 Gasoline Engine
$147.01
Muffler Extension Adapter E-3070: 873 Muffler Extension Adapter E-3070: 873
5 out of 5 Customer Rating
Muffler Extension Adapter E-3070: 873
$19.05
OCA-240 40-Amp 25V ESC with OCP-2 Programming Card OCA-240 40-Amp 25V ESC with OCP-2 Programming Card
3.7 out of 5 Customer Rating
OCA-240 40-Amp 25V ESC with OCP-2 Programming Card
$109.99
Rear Bearing: 25FX, 32F Rear Bearing: 25FX, 32F
4.1 out of 5 Customer Rating
Rear Bearing: 25FX, 32F
$21.17
Carburetor Body: #21K Carburetor Body: #21K
5 out of 5 Customer Rating
Carburetor Body: #21K
$48.51
Carburetor Body: #80R, FS-200S-P Carburetor Body: #80R, FS-200S-P
3.3 out of 5 Customer Rating
Carburetor Body: #80R, FS-200S-P
$97.90
Crankcase: 105HZ Crankcase: 105HZ
3.7 out of 5 Customer Rating
Crankcase: 105HZ
$179.68
Crankshaft: 35-40FP Crankshaft: 35-40FP
4.1 out of 5 Customer Rating
Crankshaft: 35-40FP
$28.68
Crankshaft: GT15 Crankshaft: GT15
3.3 out of 5 Customer Rating
Crankshaft: GT15
$74.96
Cylinder Liner: GGT10 Cylinder Liner: GGT10
5 out of 5 Customer Rating
Cylinder Liner: GGT10
$64.22
Drive Washer: FS-120 II Drive Washer: FS-120 II
3.3 out of 5 Customer Rating
Drive Washer: FS-120 II
$24.23
Gasket Set: 70SZ-H Gasket Set: 70SZ-H
4.1 out of 5 Customer Rating
Gasket Set: 70SZ-H
$7.46
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