The OS MAX 46AXII is the updated, modernised successor to the legendary 46AX – one of the most trusted and best-performing 2-stroke glow engines in RC aviation. Retaining the same mounting dimensions as the original, the MkII version introduces refined styling, improved cooling, quieter operation, and the exceptional throttle response that only O.S. engines deliver.

Featuring advanced cooling fins, the 46AXII maintains stable operating temperatures for consistent power throughout the flight. The precision carburettor includes an angled needle valve to keep fingers safely clear of the prop arc while providing the smooth, linear throttle response O.S. engines are renowned for.

Optimised to produce strong, reliable power at lower RPMs, and paired with the highly efficient E-3071 ‘Powerbox’ silencer, this engine delivers superb performance with reduced noise output. Ideal for sport, aerobatic, and scale aircraft, the 46AXII offers dependable power, easy tuning, and long service life.

Key Features

• Updated successor to the original 46AX with improved styling

• Efficient cooling fin design for excellent temperature control

• Precision carburettor with angled needle valve for safer tuning

• Smooth, linear throttle response across the entire RPM range

• E-3071 Powerbox silencer for improved performance and reduced noise

• Produces strong, reliable power at lower RPMs

• Same mounting dimensions as the original 46AX for easy upgrades

• Ideal for sport, scale, and aerobatic RC aircraft

Perfect For

• Sport aircraft (0.40–0.50 class)

• Aerobatic models

• Scale aircraft

• Pilots upgrading from older 46-class engines

Product Summary

The OS MAX 46AXII combines trusted O.S. reliability with modern refinements, making it one of the best 7.5cc glow engines available. With improved cooling, reduced noise, and smooth, consistent power delivery, it’s an outstanding choice for almost any .46-size fixed-wing model.

Specifications

• Weight: 489g (17.2 oz)

• Displacement: 7.5cc (0.455 cu.in.)

• Bore: 22.0mm (0.866")

• Stroke: 19.6mm (0.772")

• Power Output: 1.63 hp @ 16,000 rpm

• Practical RPM Range: 2,000 – 17,000

Why Buy From Probuild Aircraft

• ✅ Official UK OS Engine Stockist

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