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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145-168 of 1,755 Results
Inner Head: O.S.SPEED R21GT2 Inner Head: O.S.SPEED R21GT2
4.9 out of 5 Customer Rating
Inner Head: O.S.SPEED R21GT2
$57.99
Needle Valve Assembly #12FB: 12XZ Speed Needle Valve Assembly #12FB: 12XZ Speed
3.3 out of 5 Customer Rating
Needle Valve Assembly #12FB: 12XZ Speed
$27.29
Slide Valve #21JS Slide Valve #21JS
3.9 out of 5 Customer Rating
Slide Valve #21JS
$32.56
Crankshaft: O.S. Speed B2104 Crankshaft: O.S. Speed B2104
5 out of 5 Customer Rating
Crankshaft: O.S. Speed B2104
$237.99
O.S. Cover Plate Speed: T1203 O.S. Cover Plate Speed: T1203
5 out of 5 Customer Rating
O.S. Cover Plate Speed: T1203
$17.99
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: 21XR-B Cylinder Rebuild Kit: 21XR-B
4.1 out of 5 Customer Rating
Cylinder Rebuild Kit: 21XR-B
$149.93
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 & 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
Radial Mount: 72FS-a Radial Mount: 72FS-a
4.8 out of 5 Customer Rating
Radial Mount: 72FS-a
$44.34
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 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
Prop Washer: 40LA Prop Washer: 40LA
4.8 out of 5 Customer Rating
Prop Washer: 40LA
$6.49
Valve Exhaust: FS-120 Surpass Valve Exhaust: FS-120 Surpass
5 out of 5 Customer Rating
Valve Exhaust: FS-120 Surpass
$37.80
Carburetor #60LH: 50SX-H Hyper Carburetor #60LH: 50SX-H Hyper
4.4 out of 5 Customer Rating
Carburetor #60LH: 50SX-H Hyper
$97.88
Cam Cover: FS-20 Supass Cam Cover: FS-20 Supass
4 out of 5 Customer Rating
Cam Cover: FS-20 Supass
$7.99
Piston Pin: GT55 Piston Pin: GT55
4.4 out of 5 Customer Rating
Piston Pin: GT55
$19.14
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