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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1,182-1,229 of 1,758 Results
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!
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
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
Slide Valve 12D: 18TM Slide Valve 12D: 18TM
5 out of 5 Customer Rating
$9.77 Price reduced from $32.56 to
Clearance Sale!
Throttle Lever #2B #2CB Throttle Lever #2B #2CB
5 out of 5 Customer Rating
$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
$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 & 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 Insert: #9B Carburetor Insert: #9B
4.1 out of 5 Customer Rating
$7.99
Carburetor Rotor: 40L, 55HZ Hyper Carburetor Rotor: 40L, 55HZ Hyper
3.7 out of 5 Customer Rating
$11.97 Price reduced from $39.91 to
Clearance Sale!
Carburetor Retainer: #61B, 91HZ Carburetor Retainer: #61B, 91HZ
5 out of 5 Customer Rating
$13.78
Choke Valve: 120-300 Choke Valve: 120-300
4.7 out of 5 Customer Rating
$31.52
Cylinder Head: 65AX Cylinder Head: 65AX
5 out of 5 Customer Rating
$44.22
Cylinder Liner: 95AX Cylinder Liner: 95AX
4.1 out of 5 Customer Rating
$88.92
Cylinder Liner: FS-62V Cylinder Liner: FS-62V
5 out of 5 Customer Rating
$35.47
Carburetor Reed Valve Gasket: GT33 Carburetor Reed Valve Gasket: GT33
4.1 out of 5 Customer Rating
$3.28 Price reduced from $10.94 to
Clearance Sale!
Carburetor Gasket: 200 Surpass Carburetor Gasket: 200 Surpass
4.1 out of 5 Customer Rating
$7.46
Gear Holder Screw: 30 Wankel Rotary Gear Holder Screw: 30 Wankel Rotary
4.7 out of 5 Customer Rating
$8.43
Intake Manifold: FS-62V Intake Manifold: FS-62V
3.3 out of 5 Customer Rating
$5.74 Price reduced from $19.14 to
Clearance Sale!
Needle Holder #7H #7M #7L Needle Holder #7H #7M #7L
4.1 out of 5 Customer Rating
$11.80
Piston Pin Retainer: 81VR-M Piston Pin Retainer: 81VR-M
3.9 out of 5 Customer Rating
$6.49
Piston Pin Retainer: GT33 Piston Pin Retainer: GT33
5 out of 5 Customer Rating
$7.46
Piston: GT22 Piston: GT22
4.1 out of 5 Customer Rating
$63.22
Piston Pin: 32SX-H Piston Pin: 32SX-H
3.9 out of 5 Customer Rating
$11.91
Piston Pin: 60-61FSR SX Piston Pin: 60-61FSR SX
4.1 out of 5 Customer Rating
$9.85
Pushrods: 56FS-a Pushrods: 56FS-a
3.7 out of 5 Customer Rating
$2.80 Price reduced from $9.49 to
Clearance Sale!
Valve Spring Retainer: 90-300 Valve Spring Retainer: 90-300
5 out of 5 Customer Rating
$6.49
Valve Spring Exhaust: FS-120 Surpass Valve Spring Exhaust: FS-120 Surpass
5 out of 5 Customer Rating
$6.49