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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1,134-1,181 of 1,758 Results
Rear Bearing: Sirius 7 Rear Bearing: Sirius 7
3.4 out of 5 Customer Rating
$12.28 Price reduced from $40.94 to
Clearance Sale!
Carburetor Gasket: 70T, GF30 Carburetor Gasket: 70T, GF30
3.4 out of 5 Customer Rating
$7.46
Cover Plate: 65LA Cover Plate: 65LA
4.2 out of 5 Customer Rating
$10.99
Cover Plate: FS-120E Cover Plate: FS-120E
3.4 out of 5 Customer Rating
$6.33 Price reduced from $21.10 to
Clearance Sale!
Crankcase: 91SX-H Comp Crankcase: 91SX-H Comp
4 out of 5 Customer Rating
$39.00 Price reduced from $129.99 to
Clearance Sale!
Crankcase: FS-62V Crankcase: FS-62V
5 out of 5 Customer Rating
$63.22
Crankshaft: 46AX Crankshaft: 46AX
4 out of 5 Customer Rating
$50.72
Crankshaft: GT33 Crankshaft: GT33
4 out of 5 Customer Rating
$37.64 Price reduced from $125.47 to
Clearance Sale!
Cylinder Head: GT22 Cylinder Head: GT22
4 out of 5 Customer Rating
$52.73
Under Cover Gasket: IL-300 Dia-Star Under Cover Gasket: IL-300 Dia-Star
5 out of 5 Customer Rating
$8.49
Head Gasket: FF-320 Head Gasket: FF-320
4.4 out of 5 Customer Rating
$4.20 Price reduced from $6.49 to
Clearance Sale!
Intake Pipe Holder Assembly: FR5-300 Intake Pipe Holder Assembly: FR5-300
4 out of 5 Customer Rating
$15.99
Muffler Body F-5050: FS-95V Muffler Body F-5050: FS-95V
5 out of 5 Customer Rating
$52.73
Muffler E-5040: GT22 Muffler E-5040: GT22
5 out of 5 Customer Rating
$91.51
Piston: GT33 Piston: GT33
3.2 out of 5 Customer Rating
$68.27
Piston Ring: 40SF Piston Ring: 40SF
5 out of 5 Customer Rating
$26.24
Prop Nut Safety: FT-120 II FT-160 Prop Nut Safety: FT-120 II FT-160
3.2 out of 5 Customer Rating
$36.85
Pushrod: 120-240 Pushrod: 120-240
5 out of 5 Customer Rating
$4.20 Price reduced from $9.44 to
Clearance Sale!
Rocker Arm Support Assembly FS91-240 Rocker Arm Support Assembly FS91-240
5 out of 5 Customer Rating
$8.87 Price reduced from $29.55 to
Clearance Sale!
Rotor Stop #4B #4D #4C Rotor Stop #4B #4D #4C
4.4 out of 5 Customer Rating
$9.85
Screw Set 21-32 (10) Screw Set 21-32 (10)
3.6 out of 5 Customer Rating
$9.85
Standoff 5x31.8mm 1-1/4" (4): GT55 Standoff 5x31.8mm 1-1/4" (4): GT55
5 out of 5 Customer Rating
$40.12
Ball WLA-2: GT55 Ball WLA-2: GT55
5 out of 5 Customer Rating
$6.99
Bearing R-1240ZZ Bearing R-1240ZZ
4.8 out of 5 Customer Rating
$16.99
Prop Shaft Set: OMA-28 Series Prop Shaft Set: OMA-28 Series
3.6 out of 5 Customer Rating
$6.29 Price reduced from $20.99 to
Clearance Sale!
Long Socket Wrench With Plug Grip Long Socket Wrench With Plug Grip
3.8 out of 5 Customer Rating
$19.16
Dust Cover: 30VG Dust Cover: 30VG
4.4 out of 5 Customer Rating
$11.91
Needle Valve Assembly #11H #11HB Needle Valve Assembly #11H #11HB
3.6 out of 5 Customer Rating
$27.29
Throttle Lever #2B #2CB Throttle Lever #2B #2CB
5 out of 5 Customer Rating
$6.49
Slide Valve 12D: 18TM Slide Valve 12D: 18TM
5 out of 5 Customer Rating
$9.77 Price reduced from $32.56 to
Clearance Sale!
Crankcase: O.S. Max .12 TG Version 4 Crankcase: O.S. Max .12 TG Version 4
3.8 out of 5 Customer Rating
$54.76
Carburetor 21J3-1: 21XR-B Version II Carburetor 21J3-1: 21XR-B Version II
5 out of 5 Customer Rating
$162.87
Carburetor Reducer AL2 5.5mm, Red: Speed T1202 Carburetor Reducer AL2 5.5mm, Red: Speed T1202
5 out of 5 Customer Rating
$21.10
Crankshaft: O.S.SPEED R21GT2 Crankshaft: O.S.SPEED R21GT2
3.8 out of 5 Customer Rating
$249.99
O.S. Carburetor Body 22E (B) Speed B2103 Type R O.S. Carburetor Body 22E (B) Speed B2103 Type R
5 out of 5 Customer Rating
$26.16 Price reduced from $87.19 to
Clearance Sale!
Connecting Rod: 18TM Connecting Rod: 18TM
4.8 out of 5 Customer Rating
$48.51
Cylinder Piston Assembly: R21 Cylinder Piston Assembly: R21
4.4 out of 5 Customer Rating
$39.83 Price reduced from $132.77 to
Clearance Sale!
Inner Head: R2101 Speed Inner Head: R2101 Speed
4 out of 5 Customer Rating
$52.69
Outer Head: 21XZ-R Outer Head: 21XZ-R
4.8 out of 5 Customer Rating
$69.99
Outer Head O.S.Speed B21 Adam Drake II Outer Head O.S.Speed B21 Adam Drake II
4.8 out of 5 Customer Rating
$32.39 Price reduced from $107.98 to
Clearance Sale!
T-2080 C-Ring T-2080 C-Ring
3.6 out of 5 Customer Rating
$9.19
Carburetor Rotor: 40L-R, 55HZ-R Carburetor Rotor: 40L-R, 55HZ-R
4.8 out of 5 Customer Rating
$39.91
Cylinder Rebuild Kit: B21 Speed Adam Drake Cylinder Rebuild Kit: B21 Speed Adam Drake
3.6 out of 5 Customer Rating
$232.25
Cylinder Rebuild Kit: 21XZ-GT Speed Cylinder Rebuild Kit: 21XZ-GT Speed
4.4 out of 5 Customer Rating
$66.47 Price reduced from $221.55 to
Clearance Sale!
Cylinder & Piston B2101 Speed Cylinder & Piston B2101 Speed
5 out of 5 Customer Rating
$193.68
Carburetor: FT160, FF320 Carburetor: FT160, FF320
4.1 out of 5 Customer Rating
$102.95
Mid Bearing: 120-240 Mid Bearing: 120-240
5 out of 5 Customer Rating
$32.99
Carburetor Body: #20H Carburetor Body: #20H
3.7 out of 5 Customer Rating
$19.14