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
  • (1237)
  • (270)
  • (236)
  • (37)
  • (27)
  • (31)
  • (4)
  • (140)
  • (49)
  • (15)
  • (2)
  • (1)
  • (40)
  • (27)
  • (7)
  • (1)
  • (3)
  • (2)
  • (1)
889-912 of 1,808 Results
Crankshaft: 15CV-A Crankshaft: 15CV-A
4.7 out of 5 Customer Rating
Crankshaft: 15CV-A
$30.89
Cylinder Head: 55AX Cylinder Head: 55AX
3.7 out of 5 Customer Rating
Cylinder Head: 55AX
$34.86
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
Cylinder Liner: 200 Surpass Cylinder Liner: 200 Surpass
5 out of 5 Customer Rating
Cylinder Liner: 200 Surpass
$59.03
O.S. Dust Cover 21E 21F 22D 22J O.S. Dust Cover 21E 21F 22D 22J
4.7 out of 5 Customer Rating
O.S. Dust Cover 21E 21F 22D 22J
$11.91
Gasket Set: 12TG Gasket Set: 12TG
4.5 out of 5 Customer Rating
Gasket Set: 12TG
$10.94
Rocker Cover Gasket: GF40 Rocker Cover Gasket: GF40
3.7 out of 5 Customer Rating
Rocker Cover Gasket: GF40
$10.94
Cover Plate: 55HZ Hyper Cover Plate: 55HZ Hyper
4.1 out of 5 Customer Rating
Cover Plate: 55HZ Hyper
$11.72
Cover Plate: FS-120 III Cover Plate: FS-120 III
4.5 out of 5 Customer Rating
Cover Plate: FS-120 III
$21.10
Cover Plate: 91SZ-H Cover Plate: 91SZ-H
5 out of 5 Customer Rating
Cover Plate: 91SZ-H
$20.99
Crankcase: 75AX Crankcase: 75AX
3.3 out of 5 Customer Rating
Crankcase: 75AX
$119.78
Cover Plate: FS-200S-P Cover Plate: FS-200S-P
4.1 out of 5 Customer Rating
Cover Plate: FS-200S-P
$25.44
Crankcase: 95AX Crankcase: 95AX
4.4 out of 5 Customer Rating
Crankcase: 95AX
$125.04
Crankcase: FS81 Alpha Crankcase: FS81 Alpha
4.1 out of 5 Customer Rating
Crankcase: FS81 Alpha
$87.19
Crankcase: 25LA Natural Crankcase: 25LA Natural
5 out of 5 Customer Rating
Crankcase: 25LA Natural
$34.86
Crankcase: 55HZ Hyper Crankcase: 55HZ Hyper
4.8 out of 5 Customer Rating
Crankcase: 55HZ Hyper
$70.56
Cylinder & Piston: 15LA Cylinder & Piston: 15LA
4.8 out of 5 Customer Rating
Cylinder & Piston: 15LA
$33.18
Cylinder & Piston: 15CV Cylinder & Piston: 15CV
5 out of 5 Customer Rating
Cylinder & Piston: 15CV
$64.42
Cylinder & Piston Assembly: O.S. Speed R2104 Cylinder & Piston Assembly: O.S. Speed R2104
3.3 out of 5 Customer Rating
Cylinder & Piston Assembly: O.S. Speed R2104
$243.06
Cylinder & Piston: 21XZ-B Cylinder & Piston: 21XZ-B
4.4 out of 5 Customer Rating
Cylinder & Piston: 21XZ-B
$165.99
Cylinder Piston Assembly: R21 Cylinder Piston Assembly: R21
4.4 out of 5 Customer Rating
Cylinder Piston Assembly: R21
$132.77
Cylinder & Piston: 21XZ-B Speed Cylinder & Piston: 21XZ-B Speed
5 out of 5 Customer Rating
Cylinder & Piston: 21XZ-B Speed
$193.68
Cylinder Head: .25AX Cylinder Head: .25AX
5 out of 5 Customer Rating
Cylinder Head: .25AX
$19.99
Cylinder & Piston Assembly: 55AX Cylinder & Piston Assembly: 55AX
5 out of 5 Customer Rating
Cylinder & Piston Assembly: 55AX
$104.95
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