WE BOUGHT BIG, YOU SAVE BIGGER

Save Up To $75!

CLEARANCE SALE

Save Big While Supplies Last

WE BOUGHT BIG, YOU SAVE BIGGER

Save Up To $75!

CLEARANCE SALE

Save Big While Supplies Last

  • Cars & Trucks
  • Motorcycles
  • Aircraft
  • Boats
  • Radios
  • Batteries & Chargers
  • Parts
  • Part Finder
  • Learn & Enjoy
  • Sale
  1. Home
  2. Brands
  3. OS Engines

O.S. Engines

O.S. Engines

Quality and performance has made O.S. the standard in RC engines for over 80 years.

Filter

Less than $50

1217

Up to $100

267

Up to $250

231

Up to $500

35

$500 or more

22

97-120 of 1773 Results

    Outer Head: B2101 Speed

    Outer Head: B2101 Speed

    $108.03
    O.S. Cylinder Piston Rod Set Speed B2103 Type R

    O.S. Cylinder Piston Rod Set Speed B2103 Type R

    $242.95
    Carburetor 60PS: FS-95V
    5(1)

    Carburetor 60PS: FS-95V

    $119.97
    Carburetor Complete #61N: FS72 Alpha

    Carburetor Complete #61N: FS72 Alpha

    $102.96
    Ignition Module IG-06: GT15

    Ignition Module IG-06: GT15

    $97.70
    Crankcase: B2102 Speed

    Crankcase: B2102 Speed

    $147.19
    O.S. Dust Cover 21E 21F 22D 22J

    O.S. Dust Cover 21E 21F 22D 22J

    $11.91
    Locknut Set: FS-120 Surpass
    5(1)

    Locknut Set: FS-120 Surpass

    $26.24
    Carburetor #10G: 15LA

    Carburetor #10G: 15LA

    $25.29
    Cylinder Head: GGT15

    Cylinder Head: GGT15

    $52.69
    Silencer E-4040: GT15 75AX 95AX

    Silencer E-4040: GT15 75AX 95AX

    $51.64
    Rear Bearing: 50SX-H, 55HZ, 55AX
    5(2)

    Rear Bearing: 50SX-H, 55HZ, 55AX

    $34.76
    Needle #7M #7LFS
    5(1)

    Needle #7M #7LFS

    $13.78
    Needle Ext Cable: FR5 300
    5(1)

    Needle Ext Cable: FR5 300

    $8.49
    Cylinder Head: 55AX
    5(1)

    Cylinder Head: 55AX

    $34.86
    Throttle Lever #2F #2FB

    Throttle Lever #2F #2FB

    $7.49
    Carburetor Screw: #4D4C2H
    5(6)

    Carburetor Screw: #4D4C2H

    $6.49
    Muffler Screws #871 (2)

    Muffler Screws #871 (2)

    $6.49
    Motor Mount: FS52S, 56A
    5(1)

    Motor Mount: FS52S, 56A

    $36.85
    Muffler Mounting Screws #873 (2)
    5(3)

    Muffler Mounting Screws #873 (2)

    $6.49
    Gasket Carburetor: 61-108

    Gasket Carburetor: 61-108

    $6.49
    Ratchet Spring #7H #7D #2K
    5(3)

    Ratchet Spring #7H #7D #2K

    $6.49
    Bearing Rear: 65AX

    Bearing Rear: 65AX

    $22.16
    Front Bearing: 61FX
    5(2)

    Front Bearing: 61FX

    $22.16

    3

    4

    5

    6

    7

    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.

    Same Day ShippingFree Shipping Over $99Expert Product SupportEasy Returns

    Shop

    • New Releases
    • Our Brands
    • Spektrum Certified Used
    • Fan Gear
    • E-gift Card
    • Vehicle Finder
    • Shop Local
    • Find a Wishlist
    • Trains

    Support

    • Technical Product Support
    • RC Blog
    • Order Status
    • Repairs
    • Product Registration
    • Check E-Gift Card Balance
    • Shipping, Billing & Returns
    • Event Donations
    • Train Support
    • Know Before You Fly
    • Get Help

    Company Info

    • Our Story
    • Contact Us
    • Horizon Brands
    • RC Club
    • Horizon Hobby Visa Card
    • RC Events Calendar
    • Careers
    • Purchasing & Dealer Inquiries
    • Hobbies for Good
    • Affiliate Program

    Legal

    • Privacy Policy
    • Terms & Conditions
    • Site Map
    • Compliance
    • Patents
    • Product Recalls
    • Trademarks

    Sign up & save 10% on your next order!*

    Be the first to know about new products, deals, and events.

    *Some exclusions may apply. First time subscribers only. Your discount code will be emailed to you. By clicking sign up, you agree that you would like information, tips and offers about our events and products. See our privacy policy here.

    Sign up for Horizon Hobby Text Alerts!

    Never miss out - text HOBBY to 44721. Learn More

    Copyright 2025 © Horizon Hobby, LLC

    Our cookies

    This site uses cookies to enhance your web site experience. By continuing to browse or use this site, you are agreeing to our use of cookies. See our privacy policy here.

      Sign up & save 10% on your next order!*

      Be the first to know about new products, deals, and events.

      *Some exclusions may apply. First time subscribers only. Your discount code will be emailed to you. By clicking sign up, you agree that you would like information, tips and offers about our events and products. See our privacy policy here.

      Sign up for Horizon Hobby Text Alerts!

      Never miss out - text HOBBY to 44721. Learn More