O.S. Engines

O.S. Engines Category Image
Quality and performance has made O.S. the standard in RC engines for over 80 years.
Filter
Filter
Clear Filters
  • (1332)
  • (217)
  • (161)
  • (27)
  • (20)
  • (1)
  • (31)
  • (4)
  • (142)
  • (44)
  • (15)
  • (2)
  • (1)
  • (1)
  • (30)
  • (22)
  • (3)
  • (1)
  • (3)
  • (2)
  • (1)
1,470-1,517 of 1,758 Results
Carb Reducer 5.5mm: #11H, #11HB, 12TZ Carb Reducer 5.5mm: #11H, #11HB, 12TZ
5 out of 5 Customer Rating
Carb Reducer 5.5mm: #11H, #11HB, 12TZ
$11.80
Carburetor Body: 21J3 Carburetor Body: 21J3
4 out of 5 Customer Rating
Carburetor Body: 21J3
$29.31 Price reduced from $97.70 to
Clearance Sale! ⓘ
Carburetor Rotor: #11J Carburetor Rotor: #11J
5 out of 5 Customer Rating
Carburetor Rotor: #11J
$29.60
Connecting Rod: 21XR-B Version II Connecting Rod: 21XR-B Version II
4.8 out of 5 Customer Rating
Connecting Rod: 21XR-B Version II
$8.87 Price reduced from $29.56 to
Clearance Sale! ⓘ
Crankcase: 21XZ-B Ver2 Crankcase: 21XZ-B Ver2
4.2 out of 5 Customer Rating
Crankcase: 21XZ-B Ver2
$124.95
Thermo Insulator, 11K: 18TM Thermo Insulator, 11K: 18TM
4 out of 5 Customer Rating
Thermo Insulator, 11K: 18TM
$19.14
Gasket Head, .1 Brass: 21XZ-R Gasket Head, .1 Brass: 21XZ-R
3.6 out of 5 Customer Rating
Gasket Head, .1 Brass: 21XZ-R
$6.49
Rear Adapter: 18TM Rear Adapter: 18TM
3.2 out of 5 Customer Rating
Rear Adapter: 18TM
$19.05
Speed Flywheel Puller Speed Flywheel Puller
4 out of 5 Customer Rating
Speed Flywheel Puller
$48.34
Speed Hex Driver Replacement Tip 2.5 Speed Hex Driver Replacement Tip 2.5
3.6 out of 5 Customer Rating
Speed Hex Driver Replacement Tip 2.5
$5.52 Price reduced from $18.39 to
Clearance Sale! ⓘ
Outer Head O.S. Speed R2106 Outer Head O.S. Speed R2106
3.7 out of 5 Customer Rating
Outer Head O.S. Speed R2106
$124.99
Heat Sink Head: 91SX-H Heat Sink Head: 91SX-H
5 out of 5 Customer Rating
Heat Sink Head: 91SX-H
$17.39 Price reduced from $57.99 to
Clearance Sale! ⓘ
Powerboost Pipe: III 50, 55HZ-H Powerboost Pipe: III 50, 55HZ-H
3.3 out of 5 Customer Rating
Powerboost Pipe: III 50, 55HZ-H
$184.86
Rear Bearing: 108-160 Rear Bearing: 108-160
4.9 out of 5 Customer Rating
Rear Bearing: 108-160
$26.34
Cam Cover: FS-40 Surpass Cam Cover: FS-40 Surpass
5 out of 5 Customer Rating
Cam Cover: FS-40 Surpass
$9.44
Carburetor Screw: #103A2A Carburetor Screw: #103A2A
3.3 out of 5 Customer Rating
Carburetor Screw: #103A2A
$6.49
Back Plate Parallel Pin: Sirius 7 Back Plate Parallel Pin: Sirius 7
4.5 out of 5 Customer Rating
Back Plate Parallel Pin: Sirius 7
$6.49
Crankcase: GGT10 Crankcase: GGT10
4.1 out of 5 Customer Rating
Crankcase: GGT10
$104.09
Cylinder Head: FS155A-P Cylinder Head: FS155A-P
3.1 out of 5 Customer Rating
Cylinder Head: FS155A-P
$114.61
Cylinder Head: GT15 Cylinder Head: GT15
5 out of 5 Customer Rating
Cylinder Head: GT15
$15.81 Price reduced from $52.69 to
Clearance Sale! ⓘ
Cylinder Jacket: IL-300 Dia-Star Cylinder Jacket: IL-300 Dia-Star
4.1 out of 5 Customer Rating
Cylinder Jacket: IL-300 Dia-Star
$162.95
Cylinder Liner: 55HZ Hyper Cylinder Liner: 55HZ Hyper
5 out of 5 Customer Rating
Cylinder Liner: 55HZ Hyper
$64.39
Drive Spacer: GT33 Drive Spacer: GT33
4.1 out of 5 Customer Rating
Drive Spacer: GT33
$13.26 Price reduced from $44.22 to
Clearance Sale! ⓘ
Cylinder Liner: FS72 Alpha Cylinder Liner: FS72 Alpha
3.3 out of 5 Customer Rating
Cylinder Liner: FS72 Alpha
$43.02
Gasket Set: 50SX-H Gasket Set: 50SX-H
3.7 out of 5 Customer Rating
Gasket Set: 50SX-H
$8.43
Carburetor Spacer: Sirius 7 Carburetor Spacer: Sirius 7
5 out of 5 Customer Rating
Carburetor Spacer: Sirius 7
$3.26 Price reduced from $10.86 to
Clearance Sale! ⓘ
Intake Cam: Sirius 7 Intake Cam: Sirius 7
5 out of 5 Customer Rating
Intake Cam: Sirius 7
$21.11 Price reduced from $70.37 to
Clearance Sale! ⓘ
Link Pin: Sirius 7 Link Pin: Sirius 7
3.3 out of 5 Customer Rating
Link Pin: Sirius 7
$3.54 Price reduced from $11.80 to
Clearance Sale! ⓘ
Locknut: GT33 Locknut: GT33
5 out of 5 Customer Rating
Locknut: GT33
$17.16
Muffler Screws #871 (2) Muffler Screws #871 (2)
4.7 out of 5 Customer Rating
Muffler Screws #871 (2)
$6.49
Needle 25 2SX: 61FX Needle 25 2SX: 61FX
3.7 out of 5 Customer Rating
Needle 25 2SX: 61FX
$13.78
Main Needle Valve Assembly: 61ER Main Needle Valve Assembly: 61ER
5 out of 5 Customer Rating
Main Needle Valve Assembly: 61ER
$22.30
Needle Valve Assembly: #61B, 91HZ Needle Valve Assembly: #61B, 91HZ
4.1 out of 5 Customer Rating
Needle Valve Assembly: #61B, 91HZ
$22.30
Piston Pin Retainer: BGX 3500 Piston Pin Retainer: BGX 3500
3.3 out of 5 Customer Rating
Piston Pin Retainer: BGX 3500
$7.46
Screw Fixing 40x5mm WLA-2: GT55 Screw Fixing 40x5mm WLA-2: GT55
5 out of 5 Customer Rating
Screw Fixing 40x5mm WLA-2: GT55
$6.49
Throttle Lever #40D Throttle Lever #40D
4.1 out of 5 Customer Rating
Throttle Lever #40D
$7.46
Silencer Body: F-4051 O.S. FS-64V Silencer Body: F-4051 O.S. FS-64V
5 out of 5 Customer Rating
Silencer Body: F-4051 O.S. FS-64V
$28.99
Bearing L-840ZZ Bearing L-840ZZ
4.1 out of 5 Customer Rating
Bearing L-840ZZ
$14.99
Main Shaft: OMA-2820-950 Main Shaft: OMA-2820-950
4.3 out of 5 Customer Rating
Main Shaft: OMA-2820-950
$6.99
Cover Plate: GF30 Cover Plate: GF30
3.1 out of 5 Customer Rating
Cover Plate: GF30
$9.77 Price reduced from $32.56 to
Clearance Sale! ⓘ
Cover Plate: FS-120 III Cover Plate: FS-120 III
4.5 out of 5 Customer Rating
Cover Plate: FS-120 III
$6.33 Price reduced from $21.10 to
Clearance Sale! ⓘ
Crankshaft: GT15HZ Crankshaft: GT15HZ
5 out of 5 Customer Rating
Crankshaft: GT15HZ
$102.35
Cylinder Block: GT60 Cylinder Block: GT60
5 out of 5 Customer Rating
Cylinder Block: GT60
$233.99
Cylinder & Piston Assembly: 55AX Cylinder & Piston Assembly: 55AX
5 out of 5 Customer Rating
Cylinder & Piston Assembly: 55AX
$104.95
Cylinder Head: 91HZ-PS Cylinder Head: 91HZ-PS
3.7 out of 5 Customer Rating
Cylinder Head: 91HZ-PS
$89.99
Cylinder Liner: F91, 160, 320 Cylinder Liner: F91, 160, 320
4.7 out of 5 Customer Rating
Cylinder Liner: F91, 160, 320
$45.01
Gasket Set: 32SX-H Gasket Set: 32SX-H
5 out of 5 Customer Rating
Gasket Set: 32SX-H
$7.46
Muffler Screws #744B Muffler Screws #744B
5 out of 5 Customer Rating
Muffler Screws #744B
$6.49
Clear All

HORIZON HOBBY, WHERE RC MEMORIES LIVE.

Who We Are.

At Horizon Hobby, our personal goal is to inspire dreams and build memories. We take pride in providing the best hobby store experience for our customers, whether that’s online, at RC events, or in the RC community with RC cars, RC planes, RC boats, and so much more.

Our Values.

Our purpose is simple: deliver WOW moments. By pursuing the best experience through our portfolio of RC cars, helicopters, airplanes, boats, and more, we bring the RC community together in every city, town, and country. We are radio control innovators and Driven is our middle name.

Our Promise.

Our promise to our customers is creating one-of-a-kind experiences that keeps you coming back for more. We are more than an online hobby store. Our RC cars and trucks, RC airplanes and helicopters, and other radio control products are with you at home, on the go, and with your friends. We bring the fun.

Our policies are top notch:
Same Day Shipping
Free Shipping Over $99
Expert Product Support
Easy Returns
Sign up for Horizon Hobby Text Alerts!

Never miss out - text HOBBY to 44721Learn More

Shop
Support
Company Info
Legal
Copyright © Horizon Hobby, LLC