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
  • (1201)
  • (199)
  • (158)
  • (27)
  • (19)
  • (1)
  • (31)
  • (3)
  • (129)
  • (40)
  • (15)
  • (2)
  • (1)
  • (1)
  • (27)
  • (19)
  • (3)
  • (1)
  • (3)
  • (2)
  • (1)
841-864 of 1,605 Results
Crankcase: 12XZ Spec II Speed Crankcase: 12XZ Spec II Speed
4.1 out of 5 Customer Rating
Crankcase: 12XZ Spec II Speed
$21.00 Price reduced from $69.99 to
Clearance Sale! ⓘ
Crankshaft: 21XZ-B Spec 2 Crankshaft: 21XZ-B Spec 2
3.9 out of 5 Customer Rating
Crankshaft: 21XZ-B Spec 2
$63.06 Price reduced from $210.21 to
Clearance Sale! ⓘ
Cylinder & Piston Assembly: R2101 Speed Cylinder & Piston Assembly: R2101 Speed
4.7 out of 5 Customer Rating
Cylinder & Piston Assembly: R2101 Speed
$177.63
Inner Head: B2102 Speed Inner Head: B2102 Speed
4.7 out of 5 Customer Rating
Inner Head: B2102 Speed
$52.69
Idle Adj Valve STP #6H7L8H Idle Adj Valve STP #6H7L8H
4.1 out of 5 Customer Rating
Idle Adj Valve STP #6H7L8H
$6.49
Needle Holder 21M: 21XZ-R Needle Holder 21M: 21XZ-R
5 out of 5 Customer Rating
Needle Holder 21M: 21XZ-R
$16.09
Meter Needle Assembly #12FB: 12XZ Speed Meter Needle Assembly #12FB: 12XZ Speed
5 out of 5 Customer Rating
Meter Needle Assembly #12FB: 12XZ Speed
$17.99
Metering Needle #11H #11HB Metering Needle #11H #11HB
4.7 out of 5 Customer Rating
Metering Needle #11H #11HB
$4.83 Price reduced from $16.09 to
Clearance Sale! ⓘ
Piston Pin: 21XZ-R Piston Pin: 21XZ-R
4.1 out of 5 Customer Rating
Piston Pin: 21XZ-R
$9.85
Carburetor Reducer 8.5mm, Purple: 21M Carburetor Reducer 8.5mm, Purple: 21M
5 out of 5 Customer Rating
Carburetor Reducer 8.5mm, Purple: 21M
$21.10
Cover Plate: 28XZ Cover Plate: 28XZ
5 out of 5 Customer Rating
Cover Plate: 28XZ
$6.67 Price reduced from $22.26 to
Clearance Sale! ⓘ
Crankcase: 19XZ-B Speed Crankcase: 19XZ-B Speed
3.3 out of 5 Customer Rating
Crankcase: 19XZ-B Speed
$47.31 Price reduced from $157.70 to
Clearance Sale! ⓘ
Crankshaft: 12TG-P Crankshaft: 12TG-P
4.5 out of 5 Customer Rating
Crankshaft: 12TG-P
$50.83
Crankshaft: 21 Speed V-Spec Crankshaft: 21 Speed V-Spec
5 out of 5 Customer Rating
Crankshaft: 21 Speed V-Spec
$174.99
Inner Head: T1201 Speed Inner Head: T1201 Speed
4.7 out of 5 Customer Rating
Inner Head: T1201 Speed
$37.99
O.S. Outer Head Speed: T1203 O.S. Outer Head Speed: T1203
3.9 out of 5 Customer Rating
O.S. Outer Head Speed: T1203
$89.99
Heat Sink Head: 30VG Heat Sink Head: 30VG
3.1 out of 5 Customer Rating
Heat Sink Head: 30VG
$91.34
Gasket Set: 12TG Gasket Set: 12TG
4.5 out of 5 Customer Rating
Gasket Set: 12TG
$10.94
Pan Head Screw +3.0X12 (10) Pan Head Screw +3.0X12 (10)
4.8 out of 5 Customer Rating
Pan Head Screw +3.0X12 (10)
$9.53
90 Degree In-Cowl Header: FS110A 90 Degree In-Cowl Header: FS110A
4.8 out of 5 Customer Rating
90 Degree In-Cowl Header: FS110A
$36.85
Intake Manifold 200 Surpass Intake Manifold 200 Surpass
4.2 out of 5 Customer Rating
Intake Manifold 200 Surpass
$34.86
Motor Mount: 15CV-A, 10LA Motor Mount: 15CV-A, 10LA
4 out of 5 Customer Rating
Motor Mount: 15CV-A, 10LA
$25.44
Front Bearing: 90-300 Front Bearing: 90-300
4 out of 5 Customer Rating
Front Bearing: 90-300
$22.16
Camshaft: FS72 Alpha Camshaft: FS72 Alpha
4.2 out of 5 Customer Rating
Camshaft: FS72 Alpha
$54.63
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