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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241-264 of 1,755 Results
Cover Plate Gasket: 55HZ Hyper Cover Plate Gasket: 55HZ Hyper
4.2 out of 5 Customer Rating
Cover Plate Gasket: 55HZ Hyper
$6.49
Intake Pipe Right: FT-120 160 Intake Pipe Right: FT-120 160
5 out of 5 Customer Rating
Intake Pipe Right: FT-120 160
$22.37
Muffler Assembly Screw: F6020 FS155A-P Muffler Assembly Screw: F6020 FS155A-P
5 out of 5 Customer Rating
Muffler Assembly Screw: F6020 FS155A-P
$9.85
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
Crankcase: 21TM Crankcase: 21TM
4.2 out of 5 Customer Rating
Crankcase: 21TM
$29.31 Price reduced from $97.72 to
Clearance Sale! ⓘ
Crankshaft: 12XZ Speed Crankshaft: 12XZ Speed
4.4 out of 5 Customer Rating
Crankshaft: 12XZ Speed
$94.99
Crankshaft: 21VZ-R Crankshaft: 21VZ-R
4 out of 5 Customer Rating
Crankshaft: 21VZ-R
$109.99
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
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
Carburetor Reducer 7mm, Yellow: 21XZ-B Carburetor Reducer 7mm, Yellow: 21XZ-B
3.6 out of 5 Customer Rating
Carburetor Reducer 7mm, Yellow: 21XZ-B
$11.80
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
Needle Assembly #10E Needle Assembly #10E
5 out of 5 Customer Rating
Needle Assembly #10E
$25.44
Crankshaft O.S. Speed T1204 Crankshaft O.S. Speed T1204
4.6 out of 5 Customer Rating
Crankshaft O.S. Speed T1204
$126.49
Cylinder & Piston Set: O.S. Max .12 TG Version 4 Cylinder & Piston Set: O.S. Max .12 TG Version 4
5 out of 5 Customer Rating
Cylinder & Piston Set: O.S. Max .12 TG Version 4
$78.13
Carburetor 12D2: 12TG VII Carburetor 12D2: 12TG VII
5 out of 5 Customer Rating
Carburetor 12D2: 12TG VII
$135.44
Carburetor 22B: 21XR-B Carburetor 22B: 21XR-B
4.8 out of 5 Customer Rating
Carburetor 22B: 21XR-B
$119.78
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