O.S. Engines: 21XZ-B/Speed, 65AX, and 25FX

Oct 28, 2010 No Comments by

New from O.S. Engines:

21XZ-B & 21XZ-B Speed

The 21XZ-B engines represent the next level in high-performance engine technology.

  • The 21XZ-B boasts improved fuel mileage, plus a long stroke for superior torque
  • A 21J2 three-needle carb includes a 7 mm restrictor
  • The 21XZ-B Speed has been tuned for championship-caliber performance, with a race-proven 3-port sleeve with special inner head
  • The included 21J2 (B) carb comes with 3 sizes of restrictors for fine-tuning control
  • Both engines feature a P3 glow plug for quick, easy starts in all weather conditions

OSMG2050 – 21XZ-B – $279.99
OSMG2051 – 21XZ-B Speed – $499.99

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  • Ideal for trainers, sport planes and scale aircraft
  • Drops in easily in the same mounting space as the 61FX ABL
  • Includes a newly designed 61D carburetor with angled needle, plus an E-4010A muffler, #8 glow plug and needle extension cable set

OSMG0558 – 65AX – $209.99



Back by popular demand and redesigned to be an ideal choice for combat aircraft!

OSMG0252 – 25FX – $129.99

All three engines will be available in early November.

Trevor “Chilly” Duncan
Online News Editor
Radio Control Car Action

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About the author

Bringing you RC product news you can use on a daily basis as Car Action's Online News Editor. I have been heavily involved in RC since the late 90's, plus a diverse background that includes print and broadcast journalism, engineering, information technology, direct marketing, and even banking. Currently I enjoy racing 1/10 electric off-road, covering large race events, and spending time with my family when away from the track.
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