FATHER'S DAY GIFT GUIDE

Find the perfect RC gift for Dad!

SEND AN E-GIFT CARD TODAY

Make gifting easy. No shipping. No stress.

CLEARANCE SALE

Save Big While Supplies Last

FATHER'S DAY GIFT GUIDE

Find the perfect RC gift for Dad!

SEND AN E-GIFT CARD TODAY

Make gifting easy. No shipping. No stress.

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

1238

Up to $100

270

Up to $250

241

Up to $500

36

$500 or more

26

121-144 of 1812 Results

    M2004SC 85mm Manifold

    M2004SC 85mm Manifold

    $65.28
    Cover Plate: R21

    Cover Plate: R21

    $22.04
    Cylinder & Piston: 21XZ-B

    Cylinder & Piston: 21XZ-B

    $165.99
    Carburetor 61G: 91HZ-R Speed 3D 3C

    Carburetor 61G: 91HZ-R Speed 3D 3C

    $303.60
    Carburetor Body: 22B2, 21XZ-B Ver2

    Carburetor Body: 22B2, 21XZ-B Ver2

    $79.99
    Crankshaft: 21XR-B Version II

    Crankshaft: 21XR-B Version II

    $62.78
    Rear Adapter Fixing Screws (10): 21TM

    Rear Adapter Fixing Screws (10): 21TM

    $7.46
    Dust Cap Set, 18mm (3)

    Dust Cap Set, 18mm (3)

    $11.91
    Piston Pin: 19XZ-B Speed

    Piston Pin: 19XZ-B Speed

    $8.61
    Inner Head O-Ring O.S. T1204 (S30-FKM)

    Inner Head O-Ring O.S. T1204 (S30-FKM)

    $9.89
    T-2080SC II Tuned Silencer Complete Set

    T-2080SC II Tuned Silencer Complete Set

    $270.89
    Crankshaft: 12XZ Speed Spec II

    Crankshaft: 12XZ Speed Spec II

    $119.97
    Cylinder/Piston/Rod: B2101 Speed

    Cylinder/Piston/Rod: B2101 Speed

    $242.95
    Inner Head: 21XZ-R Speed

    Inner Head: 21XZ-R Speed

    $57.96
    Carburetor Reducer 8mm, Red: Speed 21 V-Spec

    Carburetor Reducer 8mm, Red: Speed 21 V-Spec

    $21.10
    M1006SC Manifold

    M1006SC Manifold

    $71.60
    TR02 Tuned Silencer EFRA2165

    TR02 Tuned Silencer EFRA2165

    $184.82
    Crankshaft: 21XZ-B Speed

    Crankshaft: 21XZ-B Speed

    $174.99
    Inner Head: 12XZ Speed Spec 3

    Inner Head: 12XZ Speed Spec 3

    $31.99
    Outer Head: Speed 21 V-Spec

    Outer Head: Speed 21 V-Spec

    $139.99
    Mixture Control Valve 18TM

    Mixture Control Valve 18TM

    $14.73
    Metering Needle Assembly: 30VG

    Metering Needle Assembly: 30VG

    $19.14
    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

    4

    5

    6

    7

    8

    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