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OS ENGINES

 

SPECIFICATIONS:
Stock Number: OSMG0527
Displacement: 0.248 cu in (4.07 cc)
Bore: 0.709 in (18.0 mm)
Stroke: 0.630 in (16.0 mm)
Practical rpm range: 2,500-16,000
Power output: 0.79 hp @ 13,500 rpm
Weight w/muffler: 12.6 oz (357 g)
Includes: No. 8 glow plug, E-3080 silencer, needle valve extension cable set

 MAX 25AX

$159.99

Our most compact AX powerhouse yet!

Now smaller aircraft can reap the benefits of an AX engine – increased power with more compact dimensions – by just bolting in a 25AX!

  • A great engine option for smaller planes with cramped cowls.
     
  • Delivers smooth, dependable power.
     
  • ABL (Advanced Bimetallic Liner) technology increases engine durability.
     
  • An included E-3080 silencer produces milder, quieter sound.

 

SPECIFICATIONS:
Stock Number: OSMG0545
Bore: 0.795 in (20.2 mm)
Stroke: 0.709 in (18.0 mm)
RPM range: 2,500-19,000*
Output (hp @ RPM): 1.28 @ 16,000
Weight w/muffler: 12.8 oz (363 g)
Includes: Power Box E-3080 muffler, #8 glow plug, needle valve extension cable
Recommended Props: 10x6, 10x7,

11x6, 12x6

 MAX 35AX

$154.98

Big power in a small AX engine!

The same quality construction that has enabled AX engines to deliver FX power in a more compact size can be found in the 35AX. Popular-sized aircraft will be able to swing bigger props, which means improved all-around performance. Plus, the 35AX requires no modifications to fit inside a cowl designed for a smaller engine!

  • Same mounting dimensions as the 32SX and 25FX engines.
     
  • Distinctive 5-sided heat sink head design for better cooling.
     
  • Diagonally-mounted needle that makes adjustments much safer.

 

SPECIFICATIONS:
Stock Number: OSMG0547
Displacement: 0.455 cu in (7.5 cc)
Bore: 0.866 in (22.0 mm)
Stroke: 0.772 in (19.6 mm)
Practical rpm: 2,000-17,000
Output: 1.63 hp @ 16,000 rpm
Weight:13.2 oz (375 g) without muffler
17.2 oz (489 g) with muffler
Includes: #A3 glow plug, Power Box E-3010 muffler
Requires: glow fuel, prop
Recommended Props: 10.5x6, 11x6-8, 12x6-7

 MAX 46AX

$149.97

As the replacement for the high-performance 46FX, it's no wonder that the .46 AX shares many of its features. The raw power. A remote needle valve. Mounting bolt patterns. A balanced "D"-cut crankshaft supported by dual bearings. CNC-machining for the piston and other parts. And the same exclusive ABL cylinder liner that has made FX reliability a byword. But all the same, the 46AX is a different – and better – engine. Why? Because times change and technology advances. And because O.S. uses the best of both to make a good engine a better engine.

  • Features the 46FX's durable ABL (Advanced Bimetallic Liner) plating, as well as a new design that automatically centers, levels and seats the head during re-replacement. Head snugs down with only four screws – not six.
     
  • Subtly tapered low-end needle eliminates surging at transition, ensuring exceptionally smooth, consistent throttle control from idle to top speed.
     
  • Redesigned liner ports and a ball-milled inlet port minimize turbulence during fuel/air mixing, making combustion and power output more predictable.
     
  • New high-speed needle bracket simplifies horizontal/vertical mounting – and can be replaced in just minutes.
     
  • Minimizes vibration-induced "creep" and re-sets with a ratchet spring on the high-speed needle and seals on both needles. A simple rotor guide screw replaces the throttle stop screw – and eliminates spring-related movement.
     
  • Includes a new low-noise E-3070 muffler and 2-year limited warranty protection.
     
  • Includes a lock nut and longer crankshaft with more thread length, for better prop nut engagement and greater pilot safety.

 

SPECIFICATIONS:
Stock Number: OSMG0556
Displacement: 0.545 cu in (9 cc)
Bore: 0.91 in (23 mm)
Stroke: 0.85 in (21.5 mm)
Practical rpm: 2,000-17,000
Output: 1.68 hp @ 16,000 rpm
Weight: 14.29 oz (405 g) w/o muffler
18.52 oz (525 g) w/ muffler
Includes: #8 glow plug, 40J carburetor, Power Box E-3070 muffler
Recommended Props: 12x7, 12x8, 13x6, 13x7

 MAX 55AX

$159.99

More muscle for .40 sized airplanes.

Increase displacement in your 40-size model the easy way: just drop in a 55AX engine! You'll enjoy more horsepower for swinging bigger props ™ which means improved 3D, precision and sport flying. Best of all, there's no modifications required!

  • Mounts directly into the bolt pattern for a 46AX.

     
  • A diagonally-placed needle eliminates the need for a remote needle valve.

     
  • The 5-sided, angular head design looks great and significantly increases surface area for better cooling.

 

 

 

 

SPECIFICATIONS:
Stock Number: OSMG0558
Displacement: 0.65 cu in (10.63 cc)
Bore: 0.95 in (24 mm)
Stroke: 0.93 in (23.5 mm)
Practical RPM Range: 2,500-16,000
Output: 1.73 hp @ 16,000 rpm
Weight w/o muffler: 17.5 oz (497 g)
Includes: #8 glow plug, 61D carb, E-4010 muffler, needle extension cable set

 MAX 65AX

$199.95

This is a high performance two stroke engine designed for sport and aerobatic models.

  • Mounts in the same space as the 61FX ABL for easy drop-ins.
     

  • The 65AX is 1.9 ounces lighter than the 61FX.

  • Newly designed 61D carburetor features an angled needle for safety.
     

  • Includes an E-4010A muffler, #8 glow plug & needle extension cable set.
     

  • Compatible with the ultra-quiet, ultra-compact E-4050 muffler.

 

SPECIFICATIONS:
Stock Number: OSMG0575
Displacement: 0.75 cu in (12.3 cc)
Bore: 1.02 in (25.8 mm)
Stroke: 0.93 in (23.5 mm)
Practical rpm: 2,000-16,000
Output: 2.37 hp @ 15,000 rpm
Weight:20.39 oz (578g) w/o muffler
 26.46 oz (750g) w/ muffler
Includes: glow plug, Power Box E-4040 muffler
Recommended Props: 14x6, 14x8, 15x7

 MAX 75AX

$219.96

The new power source for .60 sized aircraft!

  • Fits the same mount and bolt pattern as the 61FX.
     
  • The angular head design looks great and significantly increases surface area for better cooling.
     
  • Includes the new Power Box™ muffler, designed with more volume for increased power while still being very compact.
     
  • A diagonally-placed needle means no remote needle valve is needed.

 

SPECIFICATIONS
Stock Number: OSMG0580
Displacement: 0.949 cu in (15.55 cc)
Bore: 1.091 in (27.7 mm)
Stroke: 1.016 in (25.8 mm)
Practical rpm range: 2,000-16,000
Power output: 2.86 hp @ 15,000 rpm
Engine weight: 20 oz (567 g)
Muffler weight: 6.28 oz (178 g)
Includes: E-4040 Power Box silencer, O.S. #8 Glow Plug, Needle Valve Extension
Recommended prop sizes: 14x8, 15x6-8, 16x6-8

 MAX 95AX

$279.99

The power of a 95 – in the same size bolt pattern as the 75AX!

The 95AX is another popular-sized engine in the AX series that's famous for providing uncompromising power in tight-fitting applications.

  • A high-performance engine that's ideal for aerobats and large-scale models.
     
  • Generous thread on the extra-long, balanced crankshaft means more secure prop attachment
     
  • Balanced crankshaft provides smoother running which is important on the larger single-cylinder engines as vibrations can literally shake apart the airframe.
     
  • The E-4040 Power Box™ muffler that's included dampens noise while boosting power.
     

 

SPECIFICATIONS:
Stock Numbers:
    OSMG0650 - with muffler
    OSMG0651 - without muffler
Displacement: 1.20 cu in (20 cc)
Bore: 1.197 in (30.4 mm)
Stroke: 1.083 in (27.5 mm)
Practical rpm: 1,800-9,500
Output: 3.1 hp @ 9,000 rpm
Engine weight: 22.8 oz (647 g)
Muffler weight:
    7.07 oz (219 g) with 90° adapter installed
    7.91 oz (245 g) with extension installed
Includes: #8 glow plug, 70D dual-needle carburetor, E-5020 Power Box muffler w/two adapters
Recommended Props: 15x10-12, 16x8-10

 MAX 120AX

$279.99

Perfect for 3D, precision and sport flying!

It's the "no mod" way to ratchet up horsepower for more flying fun! The 120AX fits in the same space as a .91 — while boasting 20% more displacement. That means it can turn bigger props with ease, resulting in improved 3D, precision and sport flying. Boost your plane's performance, without compromising weight or mounting space — bolt in a 120AX and see the difference for yourself!

  • Delivers 20% more power than a .91, and with new CCD technology will bolt right where the .91 used to be.
     
  • At 21 ounces, the 120AX is a very minimal weight increase over a .91.
     
  • The new angular head design not only looks great, it significantly increases surface area for better heat transfer.

 

SPECIFICATIONS:
Stock Numbers:
    OSMG0525 - with muffler
Displacement: 1.60 cu in (26 cc)
Bore: 1.32 in (33.6mm)
Stroke: 1.16 in (29.6mm)
Practical rpm: 1,800-10,000
Output: 3.65 hp @ 9,000 rpm
Engine weight: 32.6 oz (925 g)
Muffler weight:7.07 oz (219 g) with 90° adapter installed 7.91 oz (245 g) with extension installed
Includes: #8 glow plug, 70D dual-needle carburetor, E-5020 Power Box muffler w/two adapters
Recommended Props:

Aerobatic: 15x12-14, 16x10-14, 16.5x10-13
Sport: 17x10-13, 18x10-12

 MAX 160FX

$289.98

The state-of-the-art in sport/competition engines!

  • All FX engines come with remote needle valve - the feature most asked for!
     
  • A longer crankshaft provides more secure attachment for spinner, prop and nut
     
  • Dual ball bearing construction adds durability and longevity
     
  • Semi-square head shape creates more fin area to increase cooling capacity

     
  • Each engine comes with a high-performance carburetor and muffler with adjustable exhaust direction and built-in pressure tap
     
  • 61FX features a remote needle valve that can be positioned two ways, to help you avoid cowl modification and preserve your plane's scale lines; 160 FX remote needle can be mounted three ways

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02/25/13