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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 35 AX is a powerful two-stroke engine with a crankshaft mounted with a pair of ball bearings, suitable for all types of sport and competition aerobatic models. It is equipped with a 21K double-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-3080 (power box) is also supplied in the basic set. The direction of the exhaust port can be changed by rotating the back of the muffler 360 degrees.The same dimensions as the classic OS MAX 25FX and 35AX.The crankshaft has a thread for the propeller nut UNF 1/4-28.Recommended propeller dimensions: Break-in: 10x6" / sport and aerobatic: 10x6-7", 11x6", 12x6".Recommended fuel tank: 180-250ml; 180ml tank is enough for 10 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, no. 7 or No.6.Engine set includes: OS MAX 35 AX engine with RC carburetor 21K, exhaust silencer type E-3080, main needle extension set, glow plug no. 8, instructions.SpecificationsDisplacement: 5.77ccPower approx. (1.3) (hp) at 16,000 rpmSpeed ??range: 2,500 - 17,000 rpmBore: 20.2mmStroke: 18mmTotal weight: 363gCarburettor: 21LShaft thread 1/4"-28 UNFWeight 280gLength to hub: approx. 75.6 mmWidth: approx. 46 mmHeight: approx. 75.5mmDistance of mounting holes lengthways 15 mm, widthways 38 mmFixing hole Ø 3.2 mmRecommended propellers: 10x6" / sports and aerobatics: 10x6-7", 11x6", 12x6" OS13100

The OS 25FX II is a powerful 2-stroke side exhaust internal combustion engine. OS MAX 25FX II is the perfect choice for smaller .25 sport, scale and aerobatic models. The 25FX II features the proven 21L carburetor, which guarantees perfect throttle behavior and easy adjustment. The 892 two-piece silencer is included. The outlet of the silencer can be twisted to suit the model and the installation position of the engine.Features2-stroke combustion engine with silencer 89221L carburetorPerfect control behaviorLow-vibration running behaviorEasy adjustmentSpecificationsDisplacement: 4.07ccPower approx. 0.62 kW (0.84) (hp) at 18000 rpmSpeed ??range: 2,500 - 19,000 rpmBore: 18mmStroke: 16mmWeight: 260gCarburettor: 21LShaft thread 1/4"-28 UNFWeight 260gLength to hub: approx. 75.6 mmWidth: approx. 46 mmHeight: approx. 75.5mmDistance of mounting holes lengthways 15 mm, widthways 38 mmFixing hole Ø 3.2 mmRecommended propellers: Sport: 9x5, 9x6, 9.5x5, 10x5 and Aerobatics: 9x6, 9.5x5 OS12662

OS MAX AX two-stroke engines are the latest range of high-performance power units designed primarily for sports and aerobatic models. The thoroughly engineered design features a unique ABL (Advanced Bimetallic Liner) insert with a two-layer surface coating of specially developed alloys to minimise friction and wear during operation, ensuring high performance and long life. The futuristically shaped hexagonal cylinder head with large cooling fins provides excellent cooling and allows higher power output with the same overall dimensions as the classic FX range. Thanks to this, you can benefit from the wide range of kits and model plans developed over the last decades for two-stroke OS MAX engines, or achieve a performance increase for your existing model with FX engine!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 sport and competition aerobatic models of all types. It is fitted with a 70D twin needle carburettor, the main needle of which is angled backwards for safe adjustment when the engine is running. The basic set also includes a very efficient expansion muffler type E-5020 (Power Box). The direction of the exhaust opening can be changed by turning 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 aerobatics: 15x10", 15x12", 16x8, 16x10".Recommended fuel tank: 450-500 ml; 450 ml tank is enough for 10-12 minutes of aerobatics, provided you do not always fly full throttle.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 for higher percentage of nitro No. 10.Engine set includes: OS MAX 120 AX RING engine with RC carburettor 70D, exhaust muffler type E-5020, main needle extension set, glow plug No. 8, instructions.Technical data“ Displacement: 19.96ccm“ Power approx. (3.1) (hp) at 9,000 rpm“ Speed range: 1,800 - 9,500 rpm“ Bore: 30,4mm“ Stroke: 27,5mm“ Total weight: 892g“ Carburettor: 70D“ Shaft thread 5/16"-24 UNF“ Weight: 647g“ Length to hub: approx. 100.2 mm“ Width: approx. 67 mm“ Height: approx. 109.2 mm“ Spac. Locating holes lengthwise 25.0 mm crosswise 58 mm“ Pilot hole Ø 3,2 mm“ Recommended propellers: Sport and aerobatics: 15x10" / 15x12" / 16x8 / 16x10" "O. S. ENGINES", based in Osaka/Japan, is one of the world's most renowned model engine manufacturers and has been in existence since 1936 (!). Consistent further development and state-of-the-art production processes have enabled us to achieve a high level of technical development. This is the reason why "O. S."- Engines - advanced and competitively proven 2-/4-stroke enginesEngines for all areas of model making - so popular with renowned experts, too.Double ball bearing motor with high performance and durability, suitable for all types of aircraft, especially aerobatics and scale models. OS19210

OS MAX AX two-stroke engines are the latest range of high-performance power units designed primarily for sports and aerobatic models. The thoroughly engineered design features a unique ABL (Advanced Bimetallic Liner) insert with a two-layer surface coating of specially developed alloys to minimise friction and wear during operation, ensuring high performance and long life. The futuristically shaped hexagonal cylinder head with large cooling fins provides excellent cooling and allows higher power output with the same overall dimensions as the classic FX range. Thanks to this, you can benefit from the wide range of kits and model plans developed over the last decades for two-stroke OS MAX engines, or achieve a performance increase for your existing model with FX engine!OS MAX 65 AX is a powerful two-stroke engine with a crankshaft mounted with a pair of ball bearings, suitable for sport and competition aerobatic models of all types. It is fitted with a 61D twin-needle carburettor, the main needle of which is angled backwards for safe adjustment when the engine is running. The basic set also includes a very efficient expansion muffler type E-4010 (Power Box). The direction of the exhaust opening can be changed by turning the back of the muffler 360 degrees.The same construction dimensions as the classic OS MAX 61FX.The crankshaft has a thread for the propeller nut UNF 5/16-24.Recommended propeller dimensions: Break-in: 12x6" / Sport and Aerobatics: 12x6", 13x6", 13x7", 14x6".Recommended fuel tank: 350-400 ml; 350 ml tank is enough for 10-12 minutes of aerobatics, provided you do not always fly full throttle.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 for higher percentage of nitro No. 10.Motor set includes: Engine OS MAX 65 AX with RC carburettor 60D, exhaust muffler type E-4010, main needle extension set, glow plug No. 8, instructions.Technical dataDisplacement: 10.63ccmPower approx. (1.75) (hp) at 16,000 rpmSpeed range: 2,500 - 17,000 rpmBore: 24,0mmStroke: 23,5mmTotal weight: 653gCarburettor: 60DShaft thread 5/16"-24 UNFWeight 494gLength to hub: approx. 93.3 mmWidth: approx. 60 mmHeight: approx. mmSpac. Locating holes lengthwise 25.0 mm crosswise 52 mmPilot hole Ø 3,2 mmRecommended propellers: 12x6" / Sport and aerobatics: 12x6" / 13x6" / 13x7" / 14x6" "O. S. ENGINES", based in Osaka/Japan, is one of the world's most renowned model engine manufacturers and has been in existence since 1936 (!). Consistent further development and state-of-the-art production processes have enabled us to achieve a high level of technical development. This is the reason why "O. S."- Engines - advanced and competitively proven 2-/4-stroke enginesEngines for all areas of model making - so popular with renowned experts, too.Double ball bearing motor with high performance and durability, suitable for all types of aircraft, especially aerobatics and scale models. OS16521

The OS MAX - 75 AX motor is a double ball bearing motor of high performance and durability, suitable for all types of model aircraft, especially for aerobatic and scale models.It is reliable and easy to handle. The nozzle needle is directed to the rear so that its adjustment can be made as safely as possible, at some distance from the running propeller.The construction was made according to the most modern aspects and the manufacturing is done on precision machines.This ensures consistent quality, high performance and reliability and long life.-- Supplied with silencer --.Technical data:Spacer holes lengthwise [mm]: 25Spacer holes transverse [mm]: 52Article number Manufacturer: 17400Version: 2-stroke NitroMounting hole Ø [mm]: 4,2Bore [mm]: 25.8Width [mm]: 61Speed range approx.: 2000~16000Recommended propeller: 13x8-14x8Total weight [g]: 578Approx. height [mm]: 105Stroke [mm]: 23,5Displacement [ccm]: 12,29Cooling: AirLength to hub: 130Power output: 1.77 (2.4)Power kW (hp) at: 15000Carburettor: 61 AShaft thread: 5/16"-24 UNF "O. S. ENGINES", based in Osaka/Japan, is one of the world's most renowned model engine manufacturers and has been in existence since 1936 (!). Consistent further development and state-of-the-art production processes have enabled us to achieve a high level of technical development. This is the reason why "O. S."- Engines - advanced and competitively proven 2-/4-stroke enginesEngines for all areas of model making - so popular with renowned experts, too.Double ball bearing motor with high performance and durability, suitable for all types of aircraft, especially aerobatics and scale models. OS17400

OS MAX AX two-stroke engines are the latest range of high-performance power units designed primarily for sports and aerobatic models. The thoroughly engineered design features a unique ABL (Advanced Bimetallic Liner) insert with a two-layer surface coating of specially developed alloys to minimise friction and wear during operation, ensuring high performance and long life. The futuristically shaped hexagonal cylinder head with large cooling fins provides excellent cooling and allows higher power output with the same overall dimensions as the classic FX range. Thanks to this, you can benefit from the wide range of kits and model plans developed over the last decades for two-stroke OS MAX engines, or achieve a performance increase for your existing model with FX engine!OS MAX 55 AX is a powerful two-stroke engine with a crankshaft mounted with a pair of ball bearings, suitable for sport and competition aerobatic models of all types. It is fitted with a 40K twin-needle carburettor, the main needle of which is angled backwards for safe adjustment when the engine is running. The basic set also includes a very efficient expansion muffler type E-3071 (Power Box). The direction of the exhaust opening can be changed by turning the back of the muffler 360 degrees.The same construction dimensions as the classic OS MAX 46FX.The crankshaft has a thread for the propeller nut UNF 1/4-28.Recommended propeller dimensions: Break-in: 12x7" / Sport and Aerobatics: 12x7", 12x8", 13x6", 13x7".Recommended fuel tank: 350-400 ml; 350 ml tank is enough for 10-12 minutes of aerobatics, provided you do not always fly full throttle.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 for higher percentage of nitro No. 10.Motor set includes: Engine OS MAX 55 AX with RC carburettor 40K, exhaust muffler type E-3071, main needle extension set, glow plug No. 8, instructions.Technical dataDisplacement: 8,93ccmPower approx. (1.7) (hp) at 16,000 rpmSpeed range: 2,000 - 17,000 rpmBore: 23,0mmStroke: 21,5mmTotal weight: 512gCarburettor: 40LShaft thread 1/4"-28 UNFWeight 404gLength to hub: approx. 85.4 mmWidth: approx. 51 mmHeight: approx. 91.1 mmSpac. Lengthwise position holes 17.5 mm Crosswise 44 mmPilot hole Ø 3.2 mmRecommended propellers: 12x7" / Sport and aerobatics: 12x7" / 12x8" / 13x6" / 13x7" "O. S. ENGINES", based in Osaka/Japan, is one of the world's most renowned model engine manufacturers and has been in existence since 1936 (!). Consistent further development and state-of-the-art production processes have enabled us to achieve a high level of technical development. This is the reason why "O. S."- Engines - advanced and competitively proven 2-/4-stroke enginesEngines for all areas of model making - so popular with renowned experts, too.Double ball bearing motor with high performance and durability, suitable for all types of aircraft, especially aerobatics and scale models. OS15612

OS MAX AX two-stroke engines are the latest range of high-performance power units designed primarily for sports and aerobatic models. The thoroughly engineered design features a unique ABL (Advanced Bimetallic Liner) insert with a two-layer surface coating of specially developed alloys to minimise friction and wear during operation, ensuring high performance and long life. The futuristically shaped hexagonal cylinder head with large cooling fins provides excellent cooling and allows higher power output with the same overall dimensions as the classic FX range. Thanks to this, you can benefit from the wide range of kits and model plans developed over the last decades for two-stroke OS MAX engines, or achieve a performance increase for your existing model with FX engine!OS MAX 46 AX II is a powerful two-stroke engine with a crankshaft mounted with a pair of ball bearings, suitable for sport and competition aerobatic models of all types. It is fitted with a 40K twin-needle carburettor, the main needle of which is angled backwards for safe adjustment when the engine is running. The basic set also includes a very efficient expansion muffler type E-3071 (Power Box). The direction of the exhaust opening can be changed by turning the back of the muffler 360 degrees.The same construction dimensions as the classic OS MAX 40FX and 46FX.The crankshaft has a thread for the propeller nut UNF 5/16-24.Recommended propeller dimensions: Break-in: 11x6" / Sport and aerobatics: 10.5x6", 11x6", 11x8", 12x6", 12x7.Recommended fuel tank: 300-350 ml; 300 ml tank is enough for 10-12 minutes of aerobatics, provided you do not always fly full throttle.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. 6, for higher percentage Nitro No.8.Engine set includes: Engine OS MAX 46 AX II with RC carburettor 40K, exhaust muffler type E-3071, main needle extension set, glow plug No. 8, instructions.Technical dataDisplacement: 7.45ccmPower approx. (1.65) (hp) at 16,000 rpmSpeed range: 2,000 - 17,000 rpmBore: 22,0mmStroke: 19,6mmTotal weight: 486gCarburettor: 40LShaft thread 5/16"-24 UNFWeight 378gLength to hub: approx. 84.5 mmWidth: approx. 44 mmHeight: approx. 85.4 mmSpac. Lengthwise position holes 17.5 mm Crosswise 44 mmPilot hole Ø 3.2 mmRecommended propellers: 11x6" / Sport and aerobatics: 10,5x6" / 11x6" / 11x8" "O. S. ENGINES", based in Osaka/Japan, is one of the world's most renowned model engine manufacturers and has been in existence since 1936 (!). Consistent further development and state-of-the-art production processes have enabled us to achieve a high level of technical development. This is the reason why "O. S."- Engines - advanced and competitively proven 2-/4-stroke enginesEngines for all areas of model making - so popular with renowned experts, too.Double ball bearing motor with high performance and durability, suitable for all types of aircraft, especially aerobatics and scale models. OS15490

Affordable motors OS MAX LA series for beginners and for sports models, reliable and easy to handle. The nozzle needle is laid to the rear so that its adjustment can be made as safely as possible, at a certain distance from the running air screw.Technical dataSpacing holes lengthwise [mm]: 14,5mmOffset holes transverse [mm]: 33mmProduct number Manufacturer: OS11532Version: 2-stroke nitroDepth of hole [mm]: 3,2mmBore [mm]: 15,2mmWidth [mm]: 40mmSpeed range approx.: 2500~18000 u/minTotal weight [g]: 138gHeight about [mm]: 62mmStroke [mm]: 13,7mmDisplacement [ccm]: 2,49ccmLength to hub: 64mmPower kW (hp)0.31 (0.41) at 17000 U/minCarburettor: 10 GShaft thread: M5 "O. S. ENGINES", based in Osaka/Japan, is one of the world's most renowned model engine manufacturers and has been in existence since 1936 (!). Consistent further development and state-of-the-art production processes have enabled us to achieve a high level of technical development. This is the reason why "O. S."- Engines - advanced and competitively proven 2-/4-stroke enginesEngines for all areas of model making - so popular with renowned experts, too.Double ball bearing motor with high performance and durability, suitable for all types of aircraft, especially aerobatics and scale models. OS11532

The OS MAX - 95 AX motor is a double ball bearing motor of high performance and durability, suitable for all types of model aircraft, especially for aerobatic and scale models.It is reliable and easy to handle. The nozzle needle is directed to the rear so that its adjustment can be made as safely as possible, at some distance from the running propeller.The construction was made according to the most modern aspects and the manufacturing is done on precision machines.This ensures consistent quality, high performance and reliability and long life.-- Supplied with silencer --.Technical data:Spacer holes lengthwise [mm]: 25Spacer holes transverse [mm]: 52Article number Manufacturer: 19120Version: 2-stroke NitroMounting hole Ø [mm]: 4,2Bore [mm]: 27,7Speed range approx.: 2000~16000Recommended propeller: 14x8-16x8Total weight [g]: 567Approx. height [mm]: 109Stroke [mm]: 25,8Displacement [ccm]: 15,55Cooling: AirLength to hub: 67Power output: 2.13 (2.90)Power kW (hp) at: 15000Carburettor: 61C "O. S. ENGINES", based in Osaka/Japan, is one of the world's most renowned model engine manufacturers and has been in existence since 1936 (!). Consistent further development and state-of-the-art production processes have enabled us to achieve a high level of technical development. This is the reason why "O. S."- Engines - advanced and competitively proven 2-/4-stroke enginesEngines for all areas of model making - so popular with renowned experts, too.Double ball bearing motor with high performance and durability, suitable for all types of aircraft, especially aerobatics and scale models. OS19120

Zweitakt-Flugzeugmotor 4,07ccm mit Glühkerze und RC-Vergaser. Leistung 0,6PS bei 15000UpM. Drehzahlbereich: 500 – 16000UpM. Gewicht ohne Dämpfer 197g.Preisgünstige Motoren OS MAX LA serie für Beginner und für Sportmodelle, zuverlässig und einfach zu handhaben. Die Düsennadel ist nach hinten verlegt, damit deren Einstellung möglichst sicher, in einigem Abstand zur laufenden Luftschraube, vorgenommen werden kann.Technische DatenHubraum: cm³ 4,07Leistung: ca. 0,44 kW (0,6) (PS) bei 15000 U/minDrehzahlbereich: U/min ca. 500 - 16.000 u/minBohrung: 18,0mmHub: 16,0mmVergaser: 20 HWellengewinde 1 /4 "-28 UNFGewicht: 197gLänge bis Nabe: ca. 67,5mmBreite ca. 44mmHöhe ca. 74,5mmAbst. Bef.-Löcher längs 14,0 mm quer 36 mmBef.-Loch Ø 3,2 mm OS12354