O.S. Engine

O.S. Engines is a leading manufacturer of single- and multi-cylinder model aircraft engines ranging from small two-stroke to "giant-scale" four-stroke radial engines. Japanese model engine manufacturer that produces very affordable and yet easy to use engines which won acclaim for their performance and durability.

Standard accessories:
Glow Plug No.8
E-5020 Silencer Assembly
E-5020 Silencer Extension Adapter
E-5020 Silencer 90 Adapter
Needle Valve Extension Cable Set

Specifications:
Displacement: 19.96cc
Bore: 30.4mm
Stroke: 27.5mm
Output: 3.1ps / 3.06hp / 9000 rpm
Practical rpm range: 1800-9500 rpm
Weight: 647g (engine)

O.S. Engine Spare Parts - OS27381940

Needle valve holder assembly (20C,60U,70D,40J)

Use this spare part for radio controlled airplanes, helicopters and other RC models.

OS Engine "O" Ring (4BK/60J/20J/60P/40J) 2 pcs.

Spare Parts for O.S. Engine OS MAX
OS24981837

O.S. Engine medium hot glow plug for aircraft engines

Glow Plug No. 7

O.S. Engine medium glow plug for aircraft and helicopter engines

Glow Plug No. 8

Also for O.S. Max FX series

O.S. Engines is a leading manufacturer of single- and multi-cylinder model aircraft engines ranging from small two-stroke to "giant-scale" four-stroke radial engines. Japanese model engine manufacturer that produces very affordable and yet easy to use engines which won acclaim for their performance and durability.

MAX 105HZ-R with Powerboost Pipe 105 (OS72146000)

The biggest, pure helicopter engine that OS have ever made delivers the levels of torque and power demanded by top fliers for both '3D' and sport applications. The 15% increase in capacity offers a big increase over the .91 class engines yet still fits in mounts designed for that class.

Features:
Easy carburetor adjustment that stays in tune
More torque in the mid range for 3D
Velocity stack on carburetor sucks cool, undisturbed air from the fan flow
Power output of a 105HZ with 15% nitro is similar to a power of 91HZ with 30% nitro

The latest DRS system (Demand Regulator System) uses a crankcase pressure tap-off to pressurize the fuel tank via a one-way valve. The pressurized fuel is then carefully regulated at the carburetor to provide the optimum mixture no matter what demands are placed on it. This is done by using the negative pressure in the carburetor Venturi as part of the regulation system.

The carburetor itself has three mixture controls for low/mid and high speed settings. Once set for the fuel demands of your model/type of fuel and muffler, there is rarely any need to change those settings again.

The main mechanics of the engine itself are the same as with the regular MAX 105HZ engine.

Standard accessories:
Glow Plug No.7, 8, 10
Powerboost Pipe 90/105

Specifications:
Displacement: 17.17cc
Bore: 29.0mm
Stroke: 26.0mm
Output: 3.8ps / 3.75hp / 15000 rpm
Practical rpm range: 2000-16500 rpm
Weight: 608g (engine)

O.S. Engine Spare Parts - OS22805010

Connecting Rod for 25FX,21RF,SE

Use this spare part for radio controlled airplanes, helicopters and other RC model internal combustion engines.

O.S. Engine glow plug for (four) 4-stroke aircraft engines

Glow Plug F

O.S. Engine hot glow plug for aircraft engines

Glow Plug No. 6 (A3)

O.S. Engines is a leading manufacturer of single- and multi-cylinder model aircraft engines ranging from small two-stroke to "giant-scale" four-stroke radial engines. Japanese model engine manufacturer that produces very affordable and yet easy to use engines which won acclaim for their performance and durability.

O.S. PowerBoost Pipe 55 III (OS72149000)

Tuned muffler system especially designed to match to the new MAX 55HZ and MAX 55HZ-R engines. It can be also used with 50SX-H Hyper helicopter engines. It comes with the new design feature of through mounting holes - muffler is secured with a spring washer and a nut

Features:
Polished Aluminum pipe
High performance from hovering to the highest RPM

Specification:
Length: 281mm
Distance Between Mounting Holes: 37mm
Exhaust Outlet Diameter: 9mm

O.S. Engines is a leading manufacturer of single- and multi-cylinder model aircraft engines ranging from small two-stroke to "giant-scale" four-stroke radial engines. Japanese model engine manufacturer that produces very affordable and yet easy to use engines which won acclaim for their performance and durability.

Standard accessories:
Glow Plug No.8
892 Silencer Assembly

Specifications:
Displacement: 4.07cc
Bore: 18.0mm
Stroke: 16.0mm
Output: 0.84ps / 0.83hp / 18000 rpm
Practical rpm range: 2500-19000 rpm
Weight: 250g (engine) / 62g (silencer)

O.S. Engine cold glow plug for aircraft and helicopter engines

Glow Plug No. 10

Cold glow plug for engines over 10 ccm

O.S. Engines is a leading manufacturer of single- and multi-cylinder model aircraft engines ranging from small two-stroke to "giant-scale" four-stroke radial engines. Japanese model engine manufacturer that produces very affordable and yet easy to use model engines which won acclaim for their performance and durability.

The OS Engine GT22 best fit models designed for 15cc 2-stroke or 20cc 4-stroke glow engines. Provides pilots with its reliability and durability, simple and inexpensive operation, easy adjustment, high efficiency and high performance. It creates more power and thus comes with the ability to turn larger diameter propellers than competing engines of this class, making it the first choice for pilots with the highest expectations.

An investment in O.S. gasoline power quickly pays for itself in fast starts, higher power and more flights from your fuel budget.

GT22 High performance, hand-crafted, quality inspected O.S. engine.
Uses beam mounting, unlike most other gasoline engines, for easy installation in planes designed for glow power.
Pitts style muffler has been reinforced at seams, bends and mounting bolt locations for maximum strength.
The IG-02 electronic ignition system handles 4-6 cell NiCd/NiMH or 2-cell LiPo/LiFe batteries.
Rear-mounted Walbro carburetor is custom-designed for the GT22 — a choke rod guide has also been integrated into the crankcase for effortless setup.
260 ml tank is sufficient for 11-12 minutes of aerobatic flying with a reserve
Comes with single prop locking nut.

The fuel tank and all fuel lines must be for gasoline (Tygon).

Standard accessories:
Spark Plug CM-6 (NGK)
WT1054 Walbro Carburetor
New IG-02 Electronic Ignition
E-5040 Silencer Assembly

Specifications:
Displacement: 22.12cc
Bore: 32.0mm
Stroke: 27.5mm
Output: 2.7ps / 2.66hp / 9000 rpm
Practical rpm range: 1800-9000 rpm
Weight: 762g (engine) / 133g (silencer) / 105g (ignition module)

O.S. Engines is a leading manufacturer of single- and multi-cylinder model aircraft engines ranging from small two-stroke to "giant-scale" four-stroke radial engines. Japanese model engine manufacturer that produces very affordable and yet easy to use engines which won acclaim for their performance and durability.

Standard accessories:
Glow Plug No.8
E-4040 Silencer Assembly
Needle Valve Extension Cable Set

Specifications:
Displacement: 15.55cc
Bore: 27.7mm
Stroke: 25.8mm
Output: 2.9ps / 2.86hp / 15000 rpm
Practical rpm range: 2000-16000 rpm
Weight: 567g (engine)

O.S. Engines is a leading manufacturer of single- and multi-cylinder model aircraft engines ranging from small two-stroke to "giant-scale" four-stroke radial engines. Japanese model engine manufacturer that produces very affordable and yet easy to use model engines which won acclaim for their performance and durability.

Features:
The O.S. GT120T is a 120cc flat twin petrol engine ideally suited to large aerobatic aircraft where only the best will do. The impressive 10ps (9.88hp) power output is perfect to power a 100" class aerobatic aircraft as used in 3D and IMAC competitions across the world. The crankcase is precision made from aluminium using the latest machining technology OS have on offer. The HS-324A carburetor was designed to produce a special emphasis on throttle response. The GT120T includes a newly designed lightweight ignition unit called the IG-10 to provide a reliable and strong 'spark' with easy start ignition timing and protection against backwards running. To make installation simple the mounting dimensions match most popular existing 120cc twin petrol engines.

CNC aluminium crankcase
Precision HS-324A carburettor
Advanced IG-10 ignition unit included
Perfect for large 100" aerobatic aircraft
Common mounting dimensions

O.S. takes advantage of liner-less cylinder construction for benefits that include lower weight, improved cooling, and exceptionally efficient exhaust scavenging. Intake and exhaust timings are tuned to perfection as well.

Instant throttle response makes the GT120T an outstanding choice for 3D flying. When you need more power ASAP, this engine delivers!

Electronic ignition system offers fast, easy starting — and accepts LiFe, LiPo, NiCd and NiMH power.
1000 ml tank is sufficient for 12-13 minutes of aerobatic flying with a reserve

The fuel tank and all fuel lines must be for gasoline (Tygon).

Standard accessories:
2x Spark Plug CM-6 (NGK)
IG-10 Electronic Ignition Module
Propeller Washer and 6x Cap Screw (M5x50)
HS-324A Carburetor
2x Throttle Lever

Specifications:
Displacement: 2x 59.91cc
Bore: 44.0mm
Stroke: 39.4mm
Output: 10.0ps / 9.88hp / 7000 rpm
Practical rpm range: 1600-8000 rpm
Weight: 2450g (engine) / 150g (ignition module)

O.S. Engines is a leading manufacturer of single- and multi-cylinder model aircraft engines ranging from small two-stroke to "giant-scale" four-stroke radial engines. Japanese model engine manufacturer that produces very affordable and yet easy to use engines which won acclaim for their performance and durability.

MAX 105HZ-R with 61E Carburetor (OS18700)

The biggest, pure helicopter engine that OS have ever made delivers the levels of torque and power demanded by top fliers for both '3D' and sport applications. The 15% increase in capacity offers a big increase over the .91 class engines yet still fits in mounts designed for that class.

Features:
Easy carburetor adjustment that stays in tune
More torque in the mid range for 3D
Velocity stack on carburetor sucks cool, undisturbed air from the fan flow
Power output of a 105HZ with 15% nitro is similar to a power of 91HZ with 30% nitro

The carburetor itself has three mixture controls for low/mid and high speed settings. Once set for the fuel demands of your model/type of fuel and muffler, there is rarely any need to change those settings again.

Standard accessories:
Glow Plug No.7, 8, 10
Powerboost Pipe 90/105

Specifications:
Displacement: 17.17cc
Bore: 29.0mm
Stroke: 26.0mm
Output: 3.7ps / 3.65hp / 15000 rpm
Practical rpm range: 2000-16500 rpm
Weight: 596g (engine)

O.S. Engines is a leading manufacturer of single- and multi-cylinder model aircraft engines ranging from small two-stroke to "giant-scale" four-stroke radial engines. Japanese model engine manufacturer that produces very affordable and yet easy to use engines which won acclaim for their performance and durability.

MAX 105HZ-R with 61G Carburetor  (OS18750)

The biggest, pure helicopter engine that OS have ever made delivers the levels of torque and power demanded by top fliers for both '3D' and sport applications. The 15% increase in capacity offers a big increase over the .91 class engines yet still fits in mounts designed for that class.

Features:
Easy carburetor adjustment that stays in tune
More torque in the mid range for 3D
Velocity stack on carburetor sucks cool, undisturbed air from the fan flow
Power output of a 105HZ with 15% nitro is similar to a power of 91HZ with 30% nitro

The latest DRS system (Demand Regulator System) uses a crankcase pressure tap-off to pressurize the fuel tank via a one-way valve. The pressurized fuel is then carefully regulated at the carburetor to provide the optimum mixture no matter what demands are placed on it. This is done by using the negative pressure in the carburetor Venturi as part of the regulation system.

The carburetor itself has three mixture controls for low/mid and high speed settings. Once set for the fuel demands of your model/type of fuel and muffler, there is rarely any need to change those settings again.

The main mechanics of the engine itself are the same as with the regular MAX 105HZ engine.

Standard accessories:
Glow Plug No.7, 8, 10
Powerboost Pipe 90/105

Specifications:
Displacement: 17.17cc
Bore: 29.0mm
Stroke: 26.0mm
Output: 3.8ps / 3.75hp / 15000 rpm
Practical rpm range: 2000-16500 rpm
Weight: 608g (engine)

O.S. Engines is a leading manufacturer of single- and multi-cylinder model aircraft engines ranging from small two-stroke to "giant-scale" four-stroke radial engines. Japanese model engine manufacturer that produces very affordable and yet easy to use engines which won acclaim for their performance and durability.

MAX 55HZ-R

The latest engine in the 600/50 helicopter class borrows much of its technology from the fabulous MAX 105HZ-R, to provide class leading power under the most demanding conditions in 3D flying.

The latest DRS system (Demand Regulator System) uses a crankcase pressure tap-off to pressurize the fuel tank via a one-way valve. The pressurized fuel is then carefully regulated at the carburetor to provide the optimum mixture no matter what demands are placed on it. This is done by using the negative pressure in the carburetor Venturi as part of the regulation system.

The carburetor itself has three mixture controls for low/mid and high speed settings. Once set for the fuel demands of your model/type of fuel and muffler, there is rarely any need to change those settings again.

The main mechanics of the engine itself are the same as with the regular MAX 55HZ engine.

Standard accessories:
Glow Plug No.7, 8, 10
Powerboost Pipe 55/II/III

Specifications:
Displacement: 8.93cc
Bore: 23.0mm
Stroke: 21.5mm
Output: 2.1ps / 2.07hp / 17000 rpm
Practical rpm range: 2000-20000 rpm
Weight: 429g (engine)

O.S. Engines is a leading manufacturer of single- and multi-cylinder model aircraft engines ranging from small two-stroke to "giant-scale" four-stroke radial engines. Japanese model engine manufacturer that produces very affordable and yet easy to use engines which won acclaim for their performance and durability.

The best '50-class' engine on the market just became better with the introduction of the 50SX-H Hyper.

CNC machined cylinder head has been developed to give better power and improved cooling at the same time. The new carburetor has also been improved to help extract more power than the standard engine without sacrificing the throttle precision you have come to expect from OS helicopter engines.


Standard accessories:
Glow Plug No.7, 8, 10

Specifications:
Displacement: 8.17cc
Bore: 22.0mm
Stroke: 21.5mm
Output: 1.9ps / 1.87hp / 17000 rpm
Practical rpm range: 2000-20000 rpm
Weight: 406g (engine)

O.S. Engine Non-Bubble Weight

Fuel clunk

OS Engine Piston 105HZ

Spare Parts for O.S. Engine OS MAX
OS28703200

OS Engine Piston Ring for 108FSR/105HZ

Spare Parts for O.S. Engine OS MAX
OS29203400

OS Engine Head Gasket (0.2mm) for 105HZ

Spare Parts for O.S. Engine OS MAX
OS28704160

OS Engine Head Gasket (0.1mm) for 105HZ

Spare Parts for O.S. Engine OS MAX
OS28704161

OS Engine Connecting Rod 91SX-H C Spec/105HZ

Spare Part for O.S. Engine OS MAX
OS29505010

O.S. Engines is a leading manufacturer of single- and multi-cylinder model aircraft engines ranging from small two-stroke to "giant-scale" four-stroke radial engines. Japanese model engine manufacturer that produces very affordable and yet easy to use model engines which won acclaim for their performance and durability.

Second in the line of O.S. gasoline engines — but second to none in quality and performance!
When it comes to gasoline aircraft engines, the GT-33 is in a class of its own. It has the muscle to swing larger props, and it stands out for many other reasons, too. The GT-33 runs more quietly than comparable engines while exceeding their output, and it starts easily with electronic ignition that accepts many battery types. Once again O.S. has produced a gasoline powerhouse for the serious pilot!

Produces 10% more power than any other engine in its class!
Electronic ignition system offers fast, easy starting — and accepts LiFe, LiPo, NiCd and NiMH power.
Rear-mounted Walbro® carb and intake simplify mounting and installation.
O.S. E-5030 muffler effectively controls exhaust noise without compromising performance.
350 ml tank is sufficient for 13-14 minutes of aerobatic flying with a reserve
Comes with single prop locking nut.

The fuel tank and all fuel lines must be for gasoline (Tygon).

Standard accessories:
Spark Plug CM-6 (NGK)
WT1054 Walbro Carburetor
New IG-02 Electronic Ignition
E-5030 Silencer Assembly

Specifications:
Displacement: 32.98c
Bore: 36.0mm
Stroke: 32.4mm
Output: 3.9ps / 3.85hp / 9000 rpm
Practical rpm range: 1800-8000 rpm
Weight: 980g (engine) / 133g (silencer) / 105g (ignition module)

O.S. Engine (NGK) Spark Plug CM-6 for O.S. Gasoline engines

Spark Plug CM-6

Features:
This engine is designed and made in commemoration of our 80th anniversary. Cylinder head, crankcase carburetor and all the internal parts are fully machined without sacrificing easy start and easy operation, which O.S.is proud of.

Standard accessories:
Glow Plug No.8
871A Silencer Assembly
Head Gasket(0.2mm)
Spinner fastening bar

Specifications:
Displacement: 1.79cc
Bore: 13.44mm
Stroke: 12.65mm
Output: 0.31ps / 0.31hp / 18000 rpm
Practical rpm range: 2500-18000 rpm
Weight: 157.8g (engine) / 38.5g (silencer)

Features:
The MAX-15LA have been developed to meet the requirements of beginners and sport flyers. Of modern design and having a separate needle-valve unit mounted at the rear, where manual adjustment is safely remote from the rotating propeller, they offer the advantages of reliability and easy handling, at lower cost.

Standard accessories:
Glow Plug No.6
871 Silencer Assembly


Specifications:
Displacement: 2.49cc
Bore: 15.20mm
Stroke: 13.70mm
Output: 0.41ps / 0.40hp / 17000 rpm
Practical rpm range: 2500-18000 rpm
Weight: 138g (engine)

O.S. Engines is a leading manufacturer of single- and multi-cylinder model aircraft engines ranging from small two-stroke to "giant-scale" four-stroke radial engines. Japanese model engine manufacturer that produces very affordable and yet easy to use engines which won acclaim for their performance and durability.

Standard accessories:
Glow Plug No.6
892 Silencer Assembly
Silencer Retaining Screw (M3x27 2pcs.)

Specifications:
Displacement: 4.07cc
Bore: 18.0mm
Stroke: 16.0mm
Output: 0.6ps / 0.59hp / 15000 rpm
Practical rpm range: 2500-16000 rpm
Weight: 197g (engine) / 62g (silencer)