PRECISION AND POWER SAVINGS

Save Up To 50% Off!

CLEARANCE SALE

Save Big While Supplies Last

PRECISION AND POWER SAVINGS

Save Up To 50% Off!

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

193-216 of 1773 Results

    Metering Needle Assembly: 30VG

    Metering Needle Assembly: 30VG

    $19.14
    O.S. Metering Needle Assembly 22D Speed B2103

    O.S. Metering Needle Assembly 22D Speed B2103

    $19.14
    M10 In-Cowl Exhaust Header Pipe Inverted 80D: FS56A

    M10 In-Cowl Exhaust Header Pipe Inverted 80D: FS56A

    $36.85
    Booster Cable: Single

    Booster Cable: Single

    $21.04
    Carburetor Rotor: 61ER

    Carburetor Rotor: 61ER

    $45.99
    Carburetor Rotor: 61E New 91HZ

    Carburetor Rotor: 61E New 91HZ

    $48.32
    Spring Choke Friction: WLA-2, GT55

    Spring Choke Friction: WLA-2, GT55

    $5.99
    Ball Link #3 20K: 21VZ-R

    Ball Link #3 20K: 21VZ-R

    $17.16
    O.S. Ball Link #6 22D Carb Speed B2103 Type S

    O.S. Ball Link #6 22D Carb Speed B2103 Type S

    $17.16
    Carb Reducer 7.5mm, Blue

    Carb Reducer 7.5mm, Blue

    $20.99
    18TM Revo Manifold

    18TM Revo Manifold

    $52.77
    RP6 Turbo Glow Plug Medium On-Road

    RP6 Turbo Glow Plug Medium On-Road

    $14.99
    Crankcase: 12XZ Spec II Speed

    Crankcase: 12XZ Spec II Speed

    $69.99
    Crankshaft: 21XZ-B Spec 2

    Crankshaft: 21XZ-B Spec 2

    $210.21
    Cylinder & Piston Assembly: R2101 Speed

    Cylinder & Piston Assembly: R2101 Speed

    $177.63
    Inner Head: B2102 Speed

    Inner Head: B2102 Speed

    $52.69
    Inner Head: O.S. Speed R2104

    Inner Head: O.S. Speed R2104

    $76.71
    Idle Adj Valve STP #6H7L8H

    Idle Adj Valve STP #6H7L8H

    $6.49
    Needle Holder 21M: 21XZ-R

    Needle Holder 21M: 21XZ-R

    $16.09
    Metering Needle #11H #11HB

    Metering Needle #11H #11HB

    $16.09
    Meter Needle Assembly #12FB: 12XZ Speed

    Meter Needle Assembly #12FB: 12XZ Speed

    $17.99
    Piston Pin: 21XZ-R

    Piston Pin: 21XZ-R

    $9.85
    105HZ 1.05 Helicopter Engine
    5(1)

    105HZ 1.05 Helicopter Engine

    $649.99
    Carburetor Reducer 9mm, Red: Speed 21 V-Spec

    Carburetor Reducer 9mm, Red: Speed 21 V-Spec

    $21.10

    7

    8

    9

    10

    11

    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