New O.S. Engines


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

  • The 21XZ-B boasts improved fuel mileage and a long stroke for superior torque.
  • A 21J2 three-needle carburetor includes a 7-mm restrictor.
  • The 21XZ-B Speed has been tuned for championship caliber performance, with a race proven 3-port sleeve including special inner head.
  • The included 21J2 (B) carburetor comes with three 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 Retail: $449.99  Street: $279.99

OSMG2051     21XZ-B SPEED Retail: $749.99  Street: $499.99


  • This one is ideal for trainers, sport airplanes, and scale aircraft.
  • It easily drops into the same mounting space as the 61FX ABL.
  • It includes a newly designed 61D carburetor with angled needle, plus an E-4010A muffler, #8 glow plug, and needle extension cable set.

OSMG0558     65AX Retail:$339.99  Street: $209.99


  • It’s back by popular demand and redesigned to be an ideal choice for combat aircraft!

OSMG0525     25FX Retail: $199.99  Street: $129.99


Vendor Information

Great Planes
P.O. Box 9021
Champaign, IL 61821
Phone: 800-637-7660

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