BUNDLE MAY-NIA SALE

Save over 70% off!

CLEARANCE SALE

Save Big While Supplies Last

BUNDLE MAY-NIA SALE

Save over 70% off!

CLEARANCE SALE

Save Big While Supplies Last

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Discontinued

FR7-420 Sirius7 7-Cylinder Radial 4-Stroke Engine

OS Engines - OSMG1307

FR7-420 Sirius7 7-Cylinder Radial 4-Stroke Engine Product Specs

  • Bore0.944 in (24.0mm)
  • Crankshaft ThreadsUNF3/8-24
  • Displacement0.607 cu in (9.95 cc) x7
  • Outer Diameter9" (230mm)
  • Plug TypeSeven Type F glow plugs
  • Power TypeGlow
  • Product Height9.0 in (230mm)
  • Product Width9.0 in (230mm)
  • Prop Range22 x 10 - 26 x 8
  • RPM Range1,500-7,000 rpm
  • Stroke0.866 in (22.0mm)

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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.

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    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