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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525-548 of 1,605 Results
Rocker Arm: F61-300 Rocker Arm: F61-300
5 out of 5 Customer Rating
Rocker Arm: F61-300
$27.29
Hex Head Screw M3 (10): 91SZ-H Hex Head Screw M3 (10): 91SZ-H
5 out of 5 Customer Rating
Hex Head Screw M3 (10): 91SZ-H
$9.85
Valve Spring: FS155A-P Valve Spring: FS155A-P
4.4 out of 5 Customer Rating
Valve Spring: FS155A-P
$6.49
Valve Spring: F90 160 Valve Spring: F90 160
4.8 out of 5 Customer Rating
Valve Spring: F90 160
$6.49
Woodruff Key: 61S RFH Woodruff Key: 61S RFH
5 out of 5 Customer Rating
Woodruff Key: 61S RFH
$7.46
Inner Head: R2102 Speed Inner Head: R2102 Speed
4 out of 5 Customer Rating
Inner Head: R2102 Speed
$51.64
Mixture Control Screw #10ER Mixture Control Screw #10ER
5 out of 5 Customer Rating
Mixture Control Screw #10ER
$9.85
O.S. Crankshaft OS Speed R21GT O.S. Crankshaft OS Speed R21GT
4.8 out of 5 Customer Rating
O.S. Crankshaft OS Speed R21GT
$238.82
O.S. Cylinder And Piston Speed: T1203 O.S. Cylinder And Piston Speed: T1203
4.4 out of 5 Customer Rating
O.S. Cylinder And Piston Speed: T1203
$119.99
Outer Head: B21 Speed Adam Drake Outer Head: B21 Speed Adam Drake
4.4 out of 5 Customer Rating
Outer Head: B21 Speed Adam Drake
$108.03
Inner Head: 21XZ-B Inner Head: 21XZ-B
3.4 out of 5 Customer Rating
Inner Head: 21XZ-B
$52.99
202 Super Air Cleaner 202 Super Air Cleaner
4 out of 5 Customer Rating
202 Super Air Cleaner
$22.26
Carburetor Reducer 6.5mm: Speed 21 V-SpecII Carburetor Reducer 6.5mm: Speed 21 V-SpecII
4.4 out of 5 Customer Rating
Carburetor Reducer 6.5mm: Speed 21 V-SpecII
$20.05
Speed P4 Gold Super Hot Plug Speed P4 Gold Super Hot Plug
3.6 out of 5 Customer Rating
Speed P4 Gold Super Hot Plug
$16.99
Outter Head: O.S.SPEED R21GT2 Outter Head: O.S.SPEED R21GT2
5 out of 5 Customer Rating
Outter Head: O.S.SPEED R21GT2
$133.99
Inner Head: T1202 Speed Inner Head: T1202 Speed
5 out of 5 Customer Rating
Inner Head: T1202 Speed
$37.99
Outer Head: 21XZ-R Speed Outer Head: 21XZ-R Speed
5 out of 5 Customer Rating
Outer Head: 21XZ-R Speed
$102.35
Dust Cap Set, 16mm (3) Dust Cap Set, 16mm (3)
5 out of 5 Customer Rating
Dust Cap Set, 16mm (3)
$11.91
Needle Assembly #10E Needle Assembly #10E
5 out of 5 Customer Rating
Needle Assembly #10E
$25.44
O-Ring Small #2K IFN O-Ring Small #2K IFN
5 out of 5 Customer Rating
O-Ring Small #2K IFN
$6.49
Head Gasket: 0.1, 0.15, R2101 Speed Head Gasket: 0.1, 0.15, R2101 Speed
4 out of 5 Customer Rating
Head Gasket: 0.1, 0.15, R2101 Speed
$10.94
Metering Needle Assembly 18TM Metering Needle Assembly 18TM
3.6 out of 5 Customer Rating
Metering Needle Assembly 18TM
$16.09
Piston Pin: 19XZ-B Speed Piston Pin: 19XZ-B Speed
3.6 out of 5 Customer Rating
Piston Pin: 19XZ-B Speed
$8.61
Screw Set (8): 15CV-A Screw Set (8): 15CV-A
5 out of 5 Customer Rating
Screw Set (8): 15CV-A
$9.44
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