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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1,345-1,368 of 1,755 Results
Piston: GT33 Piston: GT33
3.2 out of 5 Customer Rating
Piston: GT33
$68.27
Rocker Arm Assembly: FS-40-48S Rocker Arm Assembly: FS-40-48S
3.6 out of 5 Customer Rating
Rocker Arm Assembly: FS-40-48S
$7.58 Price reduced from $25.29 to
Clearance Sale! ⓘ
Rocker Arm Support Assembly FS91-240 Rocker Arm Support Assembly FS91-240
5 out of 5 Customer Rating
Rocker Arm Support Assembly FS91-240
$29.55
Rotor Stop #4B #4D #4C Rotor Stop #4B #4D #4C
4.4 out of 5 Customer Rating
Rotor Stop #4B #4D #4C
$9.85
Standoff 5x31.8mm 1-1/4" (4): GT55 Standoff 5x31.8mm 1-1/4" (4): GT55
5 out of 5 Customer Rating
Standoff 5x31.8mm 1-1/4" (4): GT55
$40.12
Ball WLA-2: GT55 Ball WLA-2: GT55
5 out of 5 Customer Rating
Ball WLA-2: GT55
$6.99
Valve: FS-40 48Surpass Valve: FS-40 48Surpass
3.6 out of 5 Customer Rating
Valve: FS-40 48Surpass
$21.10
Throttle Lever #2B #2CB Throttle Lever #2B #2CB
5 out of 5 Customer Rating
Throttle Lever #2B #2CB
$6.49
Crankcase: O.S. Max .12 TG Version 4 Crankcase: O.S. Max .12 TG Version 4
3.8 out of 5 Customer Rating
Crankcase: O.S. Max .12 TG Version 4
$54.76
Carburetor 21J3-1: 21XR-B Version II Carburetor 21J3-1: 21XR-B Version II
5 out of 5 Customer Rating
Carburetor 21J3-1: 21XR-B Version II
$162.87
Carburetor Reducer AL2 5.5mm, Red: Speed T1202 Carburetor Reducer AL2 5.5mm, Red: Speed T1202
5 out of 5 Customer Rating
Carburetor Reducer AL2 5.5mm, Red: Speed T1202
$21.10
Crankshaft: O.S.SPEED R21GT2 Crankshaft: O.S.SPEED R21GT2
3.8 out of 5 Customer Rating
Crankshaft: O.S.SPEED R21GT2
$249.99
Connecting Rod: 18TM Connecting Rod: 18TM
4.8 out of 5 Customer Rating
Connecting Rod: 18TM
$48.51
Cylinder Piston Assembly: R21 Cylinder Piston Assembly: R21
4.4 out of 5 Customer Rating
Cylinder Piston Assembly: R21
$132.77
Inner Head: R2101 Speed Inner Head: R2101 Speed
4 out of 5 Customer Rating
Inner Head: R2101 Speed
$52.69
Cylinder Rebuild Kit: B21 Speed Adam Drake Cylinder Rebuild Kit: B21 Speed Adam Drake
3.6 out of 5 Customer Rating
Cylinder Rebuild Kit: B21 Speed Adam Drake
$232.25
Cylinder Rebuild Kit: 21XZ-GT Speed Cylinder Rebuild Kit: 21XZ-GT Speed
4.4 out of 5 Customer Rating
Cylinder Rebuild Kit: 21XZ-GT Speed
$221.55
Cylinder & Piston B2101 Speed Cylinder & Piston B2101 Speed
5 out of 5 Customer Rating
Cylinder & Piston B2101 Speed
$193.68
Outer Head: O.S. Speed R2104 Outer Head: O.S. Speed R2104
3.6 out of 5 Customer Rating
Outer Head: O.S. Speed R2104
$148.60
Carburetor Rotor: #60L, 91SX-H Carburetor Rotor: #60L, 91SX-H
4 out of 5 Customer Rating
Carburetor Rotor: #60L, 91SX-H
$29.49
Choke Valve: WLA-2, GT55 Choke Valve: WLA-2, GT55
5 out of 5 Customer Rating
Choke Valve: WLA-2, GT55
$14.99
Rear Cover Plate: GT22 Rear Cover Plate: GT22
5 out of 5 Customer Rating
Rear Cover Plate: GT22
$30.44
Cylinder Liner: FS110A Cylinder Liner: FS110A
5 out of 5 Customer Rating
Cylinder Liner: FS110A
$49.46
Thermo Insulator: 21B, 40E, 70C Carb Thermo Insulator: 21B, 40E, 70C Carb
5 out of 5 Customer Rating
Thermo Insulator: 21B, 40E, 70C Carb
$17.99
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