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)
1,393-1,416 of 1,808 Results
Choke Shaft: WLA-2, GT55 Choke Shaft: WLA-2, GT55
3.9 out of 5 Customer Rating
Choke Shaft: WLA-2, GT55
$25.99
Connecting Rod: GT33 Connecting Rod: GT33
5 out of 5 Customer Rating
Connecting Rod: GT33
$67.42
Crankcase: 75AX Crankcase: 75AX
3.3 out of 5 Customer Rating
Crankcase: 75AX
$119.78
Crankshaft: 50SX-H Crankshaft: 50SX-H
4.1 out of 5 Customer Rating
Crankshaft: 50SX-H
$55.12
Cylinder Liner: FS-40 Cylinder Liner: FS-40
4.1 out of 5 Customer Rating
Cylinder Liner: FS-40
$25.94
Drive Washer: 91FX Drive Washer: 91FX
5 out of 5 Customer Rating
Drive Washer: 91FX
$16.09
Fuel Inlet: #61B, 91HZ Fuel Inlet: #61B, 91HZ
3.5 out of 5 Customer Rating
Fuel Inlet: #61B, 91HZ
$11.80
Intake Manifold Assembly: FS-91 Surpass II Intake Manifold Assembly: FS-91 Surpass II
5 out of 5 Customer Rating
Intake Manifold Assembly: FS-91 Surpass II
$29.49
Needle Valve Holder Assembly: 91SZ-H Hyper Needle Valve Holder Assembly: 91SZ-H Hyper
3.7 out of 5 Customer Rating
Needle Valve Holder Assembly: 91SZ-H Hyper
$19.05
Pushrod Cover: FS-91 Surpass Pushrod Cover: FS-91 Surpass
4.5 out of 5 Customer Rating
Pushrod Cover: FS-91 Surpass
$10.90
Pushrod Cover Assembly: FS72 Alpha Pushrod Cover Assembly: FS72 Alpha
5 out of 5 Customer Rating
Pushrod Cover Assembly: FS72 Alpha
$11.80
Pushrod Cover Set: Sirius 7 Pushrod Cover Set: Sirius 7
5 out of 5 Customer Rating
Pushrod Cover Set: Sirius 7
$29.55
Piston: 70SZ-H Piston: 70SZ-H
4.1 out of 5 Customer Rating
Piston: 70SZ-H
$48.51
Piston Pin; FS-62V Piston Pin; FS-62V
4.7 out of 5 Customer Rating
Piston Pin; FS-62V
$11.91
Piston Pin: FS-90 160 Piston Pin: FS-90 160
4.1 out of 5 Customer Rating
Piston Pin: FS-90 160
$10.86
Piston Ring: FS30S Piston Ring: FS30S
3.9 out of 5 Customer Rating
Piston Ring: FS30S
$26.24
Piston Ring: FS-70 SII Piston Ring: FS-70 SII
4.7 out of 5 Customer Rating
Piston Ring: FS-70 SII
$29.49
Rotor Stop #3A #2A Rotor Stop #3A #2A
5 out of 5 Customer Rating
Rotor Stop #3A #2A
$6.49
Cover Plate Screws (10): 120AX Cover Plate Screws (10): 120AX
3.9 out of 5 Customer Rating
Cover Plate Screws (10): 120AX
$9.85
Standoff 5x25.4mm 1" (4): GT55 Standoff 5x25.4mm 1" (4): GT55
4.3 out of 5 Customer Rating
Standoff 5x25.4mm 1" (4): GT55
$36.85
Valve Assembly Intake: FS-91 Surpass Valve Assembly Intake: FS-91 Surpass
3.3 out of 5 Customer Rating
Valve Assembly Intake: FS-91 Surpass
$38.01
Woodruff Key: 61-91 Woodruff Key: 61-91
4.1 out of 5 Customer Rating
Woodruff Key: 61-91
$6.45
Rocker Arm Support Assembly: FS-20 Rocker Arm Support Assembly: FS-20
5 out of 5 Customer Rating
Rocker Arm Support Assembly: FS-20
$10.90
Main Shaft: 5020-490 .40 Main Shaft: 5020-490 .40
4.1 out of 5 Customer Rating
Main Shaft: 5020-490 .40
$10.99
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