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
  • (1201)
  • (199)
  • (158)
  • (27)
  • (19)
  • (1)
  • (31)
  • (3)
  • (129)
  • (40)
  • (15)
  • (2)
  • (1)
  • (1)
  • (27)
  • (19)
  • (3)
  • (1)
  • (3)
  • (2)
  • (1)
1,441-1,464 of 1,605 Results
Main Needle Valve Assembly: 61ER Main Needle Valve Assembly: 61ER
5 out of 5 Customer Rating
Main Needle Valve Assembly: 61ER
$22.30
Cap Screw 4x20mm (10): GT55 Cap Screw 4x20mm (10): GT55
3.9 out of 5 Customer Rating
Cap Screw 4x20mm (10): GT55
$11.80
O.S. MAX FS-52 SURPASS O.S. MAX FS-52 SURPASS
4.8 out of 5 Customer Rating
O.S. MAX FS-52 SURPASS
null
Rocker Arm: FS95V Rocker Arm: FS95V
3.7 out of 5 Customer Rating
Rocker Arm: FS95V
$28.45
Pushrod Cover: 56FS-a Pushrod Cover: 56FS-a
5 out of 5 Customer Rating
Pushrod Cover: 56FS-a
$2.53 Price reduced from $8.43 to
Clearance Sale! ⓘ
Carburetor 70R: FS155A-P Carburetor 70R: FS155A-P
5 out of 5 Customer Rating
Carburetor 70R: FS155A-P
$157.70
Inner Head: 21XZ-B Inner Head: 21XZ-B
3.4 out of 5 Customer Rating
Inner Head: 21XZ-B
$52.99
Piston Ring: FS-61 Piston Ring: FS-61
5 out of 5 Customer Rating
Piston Ring: FS-61
$26.24
Cylinder Piston Rod Set: O.S. Speed B2104 Cylinder Piston Rod Set: O.S. Speed B2104
3.4 out of 5 Customer Rating
Cylinder Piston Rod Set: O.S. Speed B2104
$242.95
Front Bearing: 21XZ-B Front Bearing: 21XZ-B
5 out of 5 Customer Rating
Front Bearing: 21XZ-B
$30.44
Main Shaft: 3815-1000 Main Shaft: 3815-1000
4.3 out of 5 Customer Rating
Main Shaft: 3815-1000
$8.99
Crankcase: 55AX Crankcase: 55AX
3.3 out of 5 Customer Rating
Crankcase: 55AX
$67.24
Carburetor Rotor: 61E New 91HZ Carburetor Rotor: 61E New 91HZ
4.7 out of 5 Customer Rating
Carburetor Rotor: 61E New 91HZ
$14.50 Price reduced from $48.32 to
Clearance Sale! ⓘ
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
Cover Plate: FS81 Alpha Cover Plate: FS81 Alpha
5 out of 5 Customer Rating
Cover Plate: FS81 Alpha
$17.16
Cylinder Head: FS-120 Surpass III Cylinder Head: FS-120 Surpass III
4.1 out of 5 Customer Rating
Cylinder Head: FS-120 Surpass III
$97.80
Cover Plate: B2101 Speed Cover Plate: B2101 Speed
3.7 out of 5 Customer Rating
Cover Plate: B2101 Speed
$25.44
Cylinder Head: 200 Surpass Cylinder Head: 200 Surpass
4.8 out of 5 Customer Rating
Cylinder Head: 200 Surpass
$119.86
Locknut Set: BGX 3500 Locknut Set: BGX 3500
3.2 out of 5 Customer Rating
Locknut Set: BGX 3500
$26.24
Carburetor Reducer 8mm, Red: 21VZB (P) V-Spec Carburetor Reducer 8mm, Red: 21VZB (P) V-Spec
3.7 out of 5 Customer Rating
Carburetor Reducer 8mm, Red: 21VZB (P) V-Spec
$11.80
Head Gasket: 56 FS Head Gasket: 56 FS
5 out of 5 Customer Rating
Head Gasket: 56 FS
$6.49
Propeller Washer: GT33 Propeller Washer: GT33
3.6 out of 5 Customer Rating
Propeller Washer: GT33
$8.52
Carburetor Rotor: 56 FS Carburetor Rotor: 56 FS
4.4 out of 5 Customer Rating
Carburetor Rotor: 56 FS
$8.88 Price reduced from $29.60 to
Clearance Sale! ⓘ
Cylinder Head: 91HZR Cylinder Head: 91HZR
5 out of 5 Customer Rating
Cylinder Head: 91HZR
$99.54
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