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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1,465-1,488 of 1,808 Results
O.S. Crankcase Speed: T1203 O.S. Crankcase Speed: T1203
4.1 out of 5 Customer Rating
O.S. Crankcase Speed: T1203
$79.99
Cylinder Rebuild Kit: 21XZ-B Speed Spec III Cylinder Rebuild Kit: 21XZ-B Speed Spec III
4.7 out of 5 Customer Rating
Cylinder Rebuild Kit: 21XZ-B Speed Spec III
$221.55
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: 21XZ-GT Speed Cylinder & Piston: 21XZ-GT Speed
4.1 out of 5 Customer Rating
Cylinder & Piston: 21XZ-GT Speed
$177.63
O.S. Inner Head with O-Ring Speed B2103 Type R & S O.S. Inner Head with O-Ring Speed B2103 Type R & S
5 out of 5 Customer Rating
O.S. Inner Head with O-Ring Speed B2103 Type R & S
$57.75
Needle Holder #20E Needle Holder #20E
3.7 out of 5 Customer Rating
Needle Holder #20E
$16.09
Metering Needle Assembly: 21VG Metering Needle Assembly: 21VG
3.9 out of 5 Customer Rating
Metering Needle Assembly: 21VG
$16.99
Start Shaft: 18CV-RX Start Shaft: 18CV-RX
4.7 out of 5 Customer Rating
Start Shaft: 18CV-RX
$19.14
Valve Spring: FS-26S-C Valve Spring: FS-26S-C
4.1 out of 5 Customer Rating
Valve Spring: FS-26S-C
$6.49
Cylinder Head: 91SX-H Complete Cylinder Head: 91SX-H Complete
4.4 out of 5 Customer Rating
Cylinder Head: 91SX-H Complete
$99.99
Radial Mount: 72FS-a Radial Mount: 72FS-a
4.8 out of 5 Customer Rating
Radial Mount: 72FS-a
$44.34
Carburetor Rotor: #61B, 91HZ Carburetor Rotor: #61B, 91HZ
3.6 out of 5 Customer Rating
Carburetor Rotor: #61B, 91HZ
$43.99
Carburetor Rotor: 80T Sirius 7 Carburetor Rotor: 80T Sirius 7
5 out of 5 Customer Rating
Carburetor Rotor: 80T Sirius 7
$44.18
Cover Plate: FS91-P Cover Plate: FS91-P
5 out of 5 Customer Rating
Cover Plate: FS91-P
$21.10
Connecting Rod: 70SZ-H Connecting Rod: 70SZ-H
3.2 out of 5 Customer Rating
Connecting Rod: 70SZ-H
$29.49
Crankcase Plug: GT55 Crankcase Plug: GT55
3.4 out of 5 Customer Rating
Crankcase Plug: GT55
$17.16
Crankshaft: 50SX Crankshaft: 50SX
5 out of 5 Customer Rating
Crankshaft: 50SX
$47.99
Cylinder Head: 140RX Cylinder Head: 140RX
5 out of 5 Customer Rating
Cylinder Head: 140RX
$71.53
Cylinder Head: GT15HZ Cylinder Head: GT15HZ
4.8 out of 5 Customer Rating
Cylinder Head: GT15HZ
$108.03
Cylinder Liner: 50SX-H Cylinder Liner: 50SX-H
3.6 out of 5 Customer Rating
Cylinder Liner: 50SX-H
$58.90
Cylinder Liner: FT-300 Cylinder Liner: FT-300
5 out of 5 Customer Rating
Cylinder Liner: FT-300
$59.99
Drive Washer: 25LA-S Drive Washer: 25LA-S
4.8 out of 5 Customer Rating
Drive Washer: 25LA-S
$6.49
Head Gasket: FT-160 Head Gasket: FT-160
4.4 out of 5 Customer Rating
Head Gasket: FT-160
$6.45
Head Gasket: FR5 Head Gasket: FR5
3.6 out of 5 Customer Rating
Head Gasket: FR5
$11.72
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