311,00 280,00 incl. 25% VAT

Two stroke aircraft engine with glow plug 19,96ccm with single needle RC carburetor. Power 3,1 HP at 9000 rpm.

Delivery time usually 1-2 weeks – for more detailed delivery information write to us

Technical specifications

  • Displacement: 19.96cc
  • Power approx. (3.1) (hp) at 9,000 rpm
  • Speed range: 1,800 – 9,500 rpm
  • Bore: 30.4mm
  • Stroke: 27.5mm
  • Carburettor: 70D
  • Shaft thread 5/16″-24 UNF
  • Weight: 647g
  • Length to Hub: Approx. 100.2mm
  • Width: approx. 67mm
  • Height: approx. 109.2mm
  • Distance of mounting holes lengthways 25.0 mm across 58 mm
  • Fixing hole Ø 3.2 mm
  • Recommended propellers: sport and aerobatic: 15×10″, 15×12″, 16×8, 16×10″

Product is in Backorder

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  • Euro (€) - EUR
  • Danish krone (DKK) - DKK
SKU: 00360-111 Category:


OS MAX AX 2-stroke engines are the latest range of powerful power units designed primarily for sport and aerobatic models. The meticulous construction features a unique ABL insert (Advanced Bimetallic Liner) with a two-layer surface treatment of specially developed alloys to minimize friction and wear during operation, ensuring high performance and long life. The futuristically shaped hexagonal cylinder head with large cooling fins offers excellent cooling and enables higher performance with the same dimensions as the classic FX series. Thanks to this, you can take advantage of the wide range of kits and model plans developed for OS MAX 2-stroke engines over the last few decades, or obtain a performance boost for your existing FX engine model!

OS MAX 120 AX RING is a powerful two-stroke engine with a crankshaft and piston ring mounted with a pair of ball bearings, suitable for all types of sport and competition aerobatic models. It is equipped with a 70D twin-needle carburettor, the main needle of which is oriented diagonally backwards for safe adjustment when the engine is running. A very efficient expansion damper of the type E-5020 (power box) is also supplied in the basic set. The direction of the exhaust port can be changed by rotating the rear of the muffler 90 degrees.

  • The same dimensions as the classic OS MAX 91FX but with 20% more power.
  • The crankshaft has a thread for the propeller nut UNF 5/16-24.
  • Recommended propeller dimensions: sport and aerobatic: 15×10″, 15×12″, 16×8, 16×10″.
  • Recommended fuel tank: 450-500ml; 450ml tank is enough for 10-12 minutes of aerobatics provided you don’t fly full throttle all the time.
  • Recommended fuel: at least 18% castor oil or synthetic oil (or mixture of synthetic oil and castor oil), 5-20% nitromethane.
  • Recommended candle: OS MAX No. 8 or higher proportion of Nitro No. 10

Engine set includes: OS MAX 120 AX RING engine with RC carburetor 70D, exhaust silencer type E-5020, main needle extension set, glow plug no. 8, instructions.

Exploded view:



Additional information

Weight 2 kg


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