Thunder Tiger PRO .46 Ball Bearing ABN w/Muffler 
FEATURES: Dual ball bearing-supported crankshaft
          Schnuerle porting
          ABN (Aluminum Brass Nickel) piston/cylinder assembly
          Forged aluminum connecting rod with dual bushings
          Unique "squared" cylinder head design has more surface area than
            most conventional cylinder heads, for cooler runs
          Twin-needle carburetor

INCLUDES: Engine, Expansion-Style Muffler (with pressure fitting & rotatable
            outlet), glow plug, wrenches, decals, and instructions.

REQUIRES: Prop, engine mount, fuel filter, and fuel (Thunder Tiger
            recommends fuel with castor oil).

SPECS:    Displacement:                                 .455 cu in (7.46cc)
          Bore:                                         .853" (21.8mm)
          Stroke:                                      .7874"   (20mm)
          Power Output:                                1.43 HP @ 16,000 RPM
          Maximum RPM range:                           2,000 - 17,000 RPM
          Practical RPM range:                         2,500 - 14,000 RPM
          Weight (w/muffler):                          17.01oz (482g)
          Crankshaft thread size:                      1/4-28
          Crankcase width (for engine mount):          1.36"
          Exhaust mounting width (center to center):   37mm
          Overall height:                                3.4" (87mm)
          Overall width (w/mount flanges):                       1.97" (50mm)
          Overall length (backplate to front of drive washer):   3.39" (86mm)
          Recommended prop size: Break-In: 11x5
                                 Sport and Scale: 10.5x6, 11x6
                                 Aerobatic: 10x6.5, 10.5x6, 11x5

O.S. 155FS-a Pumped Engine INSTOCK 499.99
FEATURES: Ideal for 120 size scale and sport models and aerobatic models
            requiring stable power and linear throttle response
          PD-08 pump and 70R carburetor integrated with regulator ensures
            stable fuel delivery regardless of model attitude and fuel level
          F-6020 three piece design muffler with center heatsink
          New internal lubricating system eliminates breather tubing from the
            crankcase
          Two year limited warranty through Hobby Services beginning at date of
            purchase

INCLUDES: FSa-155-P Four Cycle Engine with PD-08 Pump System, 70R Carburetor
            F-6020 Muffler, Header Pipe, type F Glow Plug, Needle Valve
            Extension Cable, Instruction Manual

REQUIRES: Fuel: Glow fuel with 5-20% nitro content and no less than 18%
            lubricant content
          Propeller: 16x8-12 or 17x8-12
          Glow Starter
          Field equipment

SPECS:    Displacement: 1.548 cu in (25.36cc)
          Bore: 1.323" (33.6mm)
          Stroke: 1.126" (28.6mm)
          Practical RPM: 2,000 - 10,000 RPM
          Power Output: 2.6hp @ 10,000 RPM
          Engine Weight: 28.40 oz (805g)
          Muffler Weight: 3.35oz (95g)
            Carburetor Settings-
          Needle Valve: 2-1/2 - 3 turns from fully closed
          Mixture Control Valve: Factory set, make only small adjustments if
            needed, after adjusting needle valve as described in manual, turn
            30° to lean idle mixture or 90° counterclockwise to richen mixture
            then back again 45° clockwise


O.S. FS-95V Ringed 4-Stroke Engine IN STOCK $ 299.99 
FEATURES: Broad power band for a wide variety of airplanes including models
            designed for .60 2-stroke and .90 4-stroke engines
          Redesigned cylinder head to match angled valve layout for steady
            power at all times and a perfect balance between high combustion
            and efficient cooling
          Redesigned "Jet Stream" muffler with unique shape for more authentic
            four stroke sound
          Same mounting dimensions, drive hub position and linkage position as
            the O.S. FS-91 Surpass II, 61FX, 65LA, 75AX, 95AX and FS-110
          Two year limited warranty through Hobby Services beginning at date of
            purchase

INCLUDES: O.S. Engines FS-95V Four Stroke Engine with Type F Glow Plug, Muffler
            Header Pipe with two Locknuts and Instruction Manual

REQUIRES: Fuel: 5-20% nitromethane aircraft blend with 18% lubricant content
          Propeller: Sport & Aerobatic 13x7-9, 14x6-8
                     Scale 15x6-8

SPECS:      Carburetor Settings-
          Needle Valve: 2-1/2 - 3 turns from fully closed
          Mixture Control Valve: Rotate until slotted head is flush with carb
            body. After setting needle valve, rotate mixture control valve
            approximately 45° clockwise to lean the mixture or 45° counter-
            clockwise to richen mixture

FEATURES: Advanced Bi-Metallic Liner. This process uses a double layer of
            plating material rather than one thick layer. This helps the metal
            to bond to the cylinder and is more durable. Also, the plating
            process is more consistent, resulting in a more precise fit between
            piston and sleeve for better compression, longer life.
          Side exhaust
          E-3071 Power Box muffler with squared-off shape enables it to fit
            into a variety of cowls
          40K carburetor with rear angled needle valve for added safety
          Ball bearing-supported crankshaft
          Two-year limited warranty through Hobby Services beginning at date of
            purchase

INCLUDES: One O.S. Max .46AXII ABL BB model airplane engine w/muffler, A3 glow
            plug, two 3mm x 35mm cap head muffler screws, extension cable for
            remote needle, 3mm x 35mm cap head muffler screws, warranty sheet,
            decal sheet, and illustrated instruction manual

REQUIRES: Fuel containing 5%-20% nitromethane with at least 16% lubricant
          Most of the fuels we carry meet or exceed the lubricant content
            required for optimum performance and maximum engine life. In the
            past, the conventional lubricant content used in fuel was 18%. But
            with new advanced technologies, fuels like Red Alert and O'Donnell
            for example, have a better quality of lubricants even though the
            percentages of lubricant content are lower. These high-tech
            lubricants provide exceptional cooling and protection
SPECS:    Displacement: 0.455 cu in (7.45cc)
          Bore: 0.866" (22mm)
          Stroke: 0.772" (19.6mm)
          Practical RPM: 2000-17000
          Power Output: 1.65PS, 1.67HP/16000 RPM
          Weight: 13.3oz (378g) without muffler
          Recommended Propellers: 10.5x6, 11x6-8, 12x6-7, use 10x6 for break-in
          Crankshaft Size: 1/4-28

          Distance from remote needle to end of crankshaft:  4.7" (119.4mm)
          Distance from center of engine to drive hub:       2.4"    (61mm)
          Distance from center of engine to end of crankshaft:  3.4"  (87.6mm)
          Distance/crankshaft center to muffler exhaust outlet: 3.9" (100.5mm)
          Height from crankcase bottom to top of cylinder head: 3.3"  (85.2mm)
          Height/crankshaft center to top of cylinder head:     2.6"  (67.4mm)
          Width including mounting tabs:                          2"  (50.8mm)
          Width not including mounting tabs:                    1.4"  (35.6mm)
          Width/mounting hole centers same side:                .69"  (17.5mm)
          Width/mounting hole centers opposite side:            1.7"    (44mm)
          Diameter of muffler body:                             1.5"  (38.1mm)
          Angle of muffler in relation to engine:               4°
          Carburetor Settings;
            Needle Valve: 1½  to 2 turns out from closed position
            Low Speed Needle (aka: Mixture Control Valve): Close throttle rotor
             gradually from the fully opened position until it is just fully
             closed (do not turn further).
             Screw in the Mixture Control Screw until it stops. Now open the
             Mixture Control Screw approx. one turn.

O.S. 46AX II ABL 40K E-3071 INSTOCK, $134.99
 This is the OS Engines GT22 Gasoline Powered Engine with Muffler        
                         and Rear Mounted Carburetor.                          
                                                                               
    **Additional Technical Info Will Be Added When It Becomes Available.**     
                                                                               
FEATURES: Beam mounting design allows engine to fit inside cowls that are      
            sized for 2-stroke .60-.91 and 4-stroke 1.20 glow engines          
          Custom designed rear mounted Walbro carburetor with choke rod guide  
            integrated into crankcase that minimizes set-up time               
          IG-02 electronic ignition handles 4-6 cell NiCd, NiMH or 2-cell LiPo 
            and LiFe batteries                                                 
          Pitts style muffler has reinforced mounting bolt holes and webbing at
            high stress points                                                 
          Two year limited warranty through Hobby Services beginning at date of
            purchase                                                           
                                                                               
INCLUDES: GT22 Engine with Muffler, Electronic Ignition Module, CM-6 Spark Plug
            Muffler Gasket, Muffler Bolts and Instruction Manual               
REQUIRES: 2-cycle oil                                                          
          Ignition Battery: 4-6 cell NiCd, NiMH, or 2-cell LiPo                
            LiPo battery requires voltage regulator                            
          Propeller: 16x8, 16x10, 17x6, 17x8                                   
          Gasoline safe fuel tubing and fuel filter                            
                                                                               
SPECS:    Displacement: 1.35 cu in (22 cc)                                     
          Bore: 1.26" (32mm)                                                   
          Stroke: 1.08" (27.5mm)                                               
          Practical RPM Range: 1,800 - 9,000                                   
          Output: 2.66 hp @ 9,000 RPM                                          
          Weight:                                                              
            Engine: 26.86oz (761.6g)                                           
            Muffler: 4.68oz (132.6g)                                           
            Ignition Module: 3.7oz (105g)                                      
 
OS Engines GT22 Gasoline Powered Engine with Muffler $ 409.99   ON ORDER
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.46LA Non-Ring 40D Carb E3030 Muffler, instock 84.99

TECH NOTES

  This is the .46LA engine from O.S. Max designed for sport airplane use.  
  This is a non-ringed engine with a Two-Year Warranty.  
  This engine has a natural finish w/"O.S." & "46LA" on the side.  
   
FEATURES: 1-piece crankcase  
  Crankshaft is set in one long bronze Oilite bushing (no bearings)  
  Schnuerle porting (AKA Schnuerle scavenging)  
  Side exhaust  
  Nylon backplate with remote needle valve  
  40D carburetor  
  Aluminum piston with Nickel-plated brass cylinder liner.  
   
INCLUDES: One expansion-style muffler #E-3030  
  One instruction manual and sticker sheet  
  One assembled engine with glow plug  
  Two 3x30mm phillips head screws to bolt muffler to engine  
   
SPECS: Construction: Aluminum 1-piece crankcase, piston, cylinder head  
  Bore: 23.0mm (0.906")  
  Stroke: 18.4mm (.724")  
  Horsepower: 1.2 PS, 1.18 HP at 15,000 RPM  
  Distance from remote needle to end of crankshaft: 4.5" (114mm)  
  Distance from center of engine to drive hub: 2.0" (51.2mm) 
  Distance from center of engine to end of crankshaft: 3.0" (76.3mm) 
  Height from crankcase bottom to top of cylinder head: 3.3" (84.7mm) 
  Height/crankshaft center to top of cylinder head: 2.7" (69mm)  
  Width including mounting ears: 1.9" (48mm)  
  Width not including mounting ears: 1.2" (32mm)  
  Width between mounting holes same side: 0.69" (17.5mm) 
  Width between mounting holes opposite side: 1.6" (40.5mm) 
  Width between muffler mounting holes: 1.4" (36mm)  
  Width of exhaust opening: 1.1" (29mm)  
  Height of exhaust opening: 0.3" (7mm)  
  Diameter of muffler body: 1.3" (33.5mm) 
  Angle of muffler in relation to engine: 4°  
  Weight: 272g (9.6oz without muffler)  
  Crankshaft Thread Size: 1/4-28  
  Recommended Props: Break In: 11x6  
  Trainer and Sport Models: 11x6, 11x7  
  Scale Models: 12x5, 12x6  
  Practical RPM Range: 2,000 - 16,000 RPM (This engine will not turn  
  this many RPM on the ground) RPM curve is when the engine unloads. 
   
REQUIRES: Fuel with 5% - 15% Nitromethane and 18% (minimum) oil content  
  (Most of the 5%-15% fuels we carry meet these requirements)  
   
COMMENTS: The factory setting of the needle valves are as follows:  
  High speed needle: Turn all the way in and back out 2 turns.  
  Air Bleed screw: Turn all the way in and back out 2 turns.  
  The coverplate for the FX Series will NOT work on this engine.  
.55AX ABL 40K E3071, INSTOCK 169.99
  This is the O.S. Max .55 AX ABL Aircraft Engine  
  with the E3071 Muffler.  
   
FEATURES: Same mounting dimensions as the O.S. Max .46 AXII  
  Advanced Bi-Metallic Liner process uses a double layer of plating  
  material rather than one thick layer. This helps the metal bond to 
  the cylinder and makes the plating more durable. Also, the plating 
  process is more consistent, resulting in a more precise fit between
  piston and sleeve for better compression and longer life.  
  Angular head design offers increased surface area for better cooling 
  40K Carburetor with diagonally placed needle valve eliminating remote
  needle valve placement  
  Two year limited warranty through Hobby Services beginning at date of
  purchase  
   
INCLUDES: O.S. Max 55 AX ABL Aircraft Engine with E-3071 Muffler, 40K  
  carburetor, #8 glow plug, illustrated instruction manual, 3.5"  
  (90mm) long needle valve, extension cable and two 3x35mm muffler  
  screws  
   
REQUIRES: Aircraft blend fuel containing 5%-20% Nitromethane with at least 18% 
  lubricant  
   
SPECS: Displacement: .545 cu in (8.93cc)  
  Bore: .91" (23mm)  
  Stroke: .85" (21.5mm)  
  Practical RPM: 2,000-17,000  
  Power Output: 1.75 PS, 1.68 HP/16,000 RPM  
  Weight: 14.29oz (404g) w/o muffler  
  w/ muffler  
  Recommended Props: 11x6, 11x7, 12x6, 12x7, 13x6  
  Crankshaft thread size: 1/4-28  
  Distance from center of engine to drive hub: 2.4" (60.4mm) 
  Distance from center of engine to end of crankshaft: 4.4" (112.6mm)
  Distance/crankshaft center to muffler exhaust outlet: 1.4" (36.7mm)  
  Height from crankcase bottom to top of cylinder head: 3.6" (91.1mm) 
  Height/crankshaft center to top of cylinder head: 2.8" (72.6mm) 
  Width including mounting tabs: 2" (51mm)  
  Width not including mounting tabs: 1.4" (36mm)  
  Width between mounting holes same side: .69" (17.5mm)  
  Width between mounting holes opposite side: 1.7" (44mm)  
  Diameter of muffler body: 1.5" (38mm)  
  Angle of muffler in relation to engine: 4°  
   
  jxs 01/03/12
   
FS56-A Ring 40NA Carb F4040 Muffler, 309.99, INSTOCK

TECH NOTES

  This is the FS155-a P Four Cycle Engine with Pump System from O.S. Engines.  

FEATURES: Ideal for 120 size scale and sport models and aerobatic models  
  requiring stable power and linear throttle response  
  PD-08 pump and 70R carburetor integrated with regulator ensures  
  stable fuel delivery regardless of model attitude and fuel level  
  F-6020 three piece design muffler with center heatsink  
  New internal lubricating system eliminates breather tubing from the  
  crankcase  
  Two year limited warranty through Hobby Services beginning at date of
  purchase  

INCLUDES: FS155-a P Four Cycle Engine with PD-08 Pump System, 70R Carburetor  
  F-6020 Muffler, Header Pipe, type F Glow Plug, Needle Valve  
  Extension Cable, Instruction Manual  

REQUIRES: Fuel: Glow fuel with 5-20% nitro content and no less than 18%  
  lubricant content  
  Propeller: 16x8-12 or 17x8-12  
  Glow Starter  
  Field equipment  

SPECS: Displacement: 1.548 cu in (25.36cc)  
  Bore: 1.323" (33.6mm)  
  Stroke: 1.126" (28.6mm)  
  Practical RPM: 2,000 - 10,000 RPM  
  Power Output: 2.6 PS, 2.56 HP @ 10,000 RPM  
  Engine Weight: 28.40 oz (805g)  
  Muffler Weight: 3.35oz (95g)  
  Carburetor Settings-  
  Needle Valve: 2-1/2 - 3 turns from fully closed  
  Mixture Control Valve: Factory set, make only small adjustments if  
  needed, after adjusting needle valve as described in manual, turn  
  30° to lean idle mixture or 90° counterclockwise to richen mixture 
  then back again 45° clockwise  

  Width at Mounting Tabs: 2.6" 67mm)  
  Crankcase Width below Mounting Tabs: 1.8" (47mm)  
  Length from Drive Washer to rear of Carburetor: 5" (127.5mm)  
  Height from Mounting Tab to Pushrod Cover: 4.5" (114mm)  
  Height from bottom of Crankcase to Pushrod Cover: 5.4" (138.6mm)  
  Distance between Mounting Hole Centers Same Side: 0.98" (25mm)  
  Distance between Mounting Hole Centers Opposite Side: 2.3" (58mm)  
  Distance/front Mounting Hole Center to Drive Washer: 2.5" (64.5mm)  
  Distance/ Center of Engine to Drive Washer: 3.03" (77mm)  
  Crankshaft Size: 5/16-24  


FS95V Ring 60P F5050 4-Stroke, ON ORDER, 299.99
Double click here to add text. This is the O.S. Engines FS-95V Four Stroke Aircraft Engine.  
   
FEATURES: Broad power band for a wide variety of airplanes including models  
  designed for .60 2-stroke and .90 4-stroke engines  
  Redesigned cylinder head to match angled valve layout for steady  
  power at all times and a perfect balance between high combustion  
  and efficient cooling  
  Redesigned "Jet Stream" muffler with unique shape for more authentic 
  four stroke sound  
  Same mounting dimensions, drive hub position and linkage position as 
  the O.S. FS-91 Surpass II, 61FX, 65LA, 75AX, 95AX and FS-110  
  Two year limited warranty through Hobby Services beginning at date of
  purchase  
   
INCLUDES: O.S. Engines FS-95V Four Stroke Engine with Type F Glow Plug, Muffler
  Header Pipe with two Locknuts and Instruction Manual  
   
REQUIRES: Fuel: 5-20% nitromethane aircraft blend with 18% lubricant content  
  Propeller: Sport & Aerobatic 13x7-9, 14x6-8  
  Scale 15x6-8  
   
SPECS: Carburetor Settings-  
  Needle Valve: 2-1/2 - 3 turns from fully closed  
  Mixture Control Valve: Rotate until slotted head is flush with carb  
  body. After setting needle valve, rotate mixture control valve  
  approximately 45° clockwise to lean the mixture or 45° counter-  
  clockwise to richen mixture  
   
  Displacement: 0.951cu in (15.59cc)  
  Bore: 1.142" (29.0mm)  
  Stroke: 0.929" (23.8mm)  
  Practical RPM: 2,100 - 11,000RPM  
  Power Output: 1.7ps/10,000RPM  
  Weight: 20.88oz (592g)  
  Muffler Weight: 2.05oz (58g)  
  Crankshaft Size: 5/16-24  
  Height from bottom of Mounting Tab to Pushrod Cover: 3.8" (97.5mm)  
  Height from bottom of Crankcase to Pushrod Cover: 4.7" (119mm)  
  Distance from Carburetor to Drive Hub: 4.5" (115.7mm)  
  Distance/Mounting Hole Centers Same Side: 0.98" (25mm)  
  Distance/Mounting Hole Centers Opposite Side: 2" (50mm)  
  Mounting Hole Diameter: 0.16" (4.2mm)  
  Distance from Drive Hub to end of Crankshaft: 1.5" (37.4mm)  
  Distance from Drive Hub to center of Engine: 2.6" (66.5mm)  
  Width at Mounting Tabs: 2.4" (61mm)  
  Width Below Mounting Tabs: 1.7" (42.6mm)  
  Height/Mounting Tab Bottom to center of Needle Valve: 0.70" (17.8mm) 
   
.46AX ABL 40G Carb E3070 Muffler, 15481 INSTOCK 149.99 
 Ideally suited to a variety of R/C aircraft including trainer, sports  
  aerobatic, and scale types.  
   
FEATURES: Redesigned remote needle holder is separate bracket, not part of  
  backplate  
  Advanced Bi-Metallic Liner. This process uses a double layer of  
  plating material rather than one thick layer. This helps the metal 
  to bond to the cylinder and is more durable. Also, the plating  
  process is more consistent, resulting in a more precise fit between
  piston and sleeve for better compression, longer life.  
  Side exhaust  
  Newly designed Power Box muffler with squared-off shape  
  40G Carburetor  
  Ball bearing-supported Crankshaft  
  TWO-YEAR limited warranty  
   
INCLUDES: One O.S. Max .46AX ABL BB model airplane engine with muffler, A3 glow
  plug, 2¼" (57mm) section of tubing for remote needle, two  
  3mm x 35mm cap head muffler screws, warranty sheet, decal sheet,  
  and illustrated instruction manual  
   
REQUIRES: Fuel containing 5%-20% nitromethane with at least 16% lubricant  
  Most of the fuels we carry meet or exceed the lubricant content  
  required for optimum performance and maximum engine life. In the  
  past, the conventional lubricant content used in fuel was 18%. But 
  with new advanced technologies, fuels like Red Alert and O'Donnell 
  for example, have a better quality of lubricants even though the  
  percentages of lubricant content are lower. These high-tech  
  lubricants provide exceptional cooling and protection.  
   
SPECS: Displacement: 0.455 cu in (7.45cc)  
  Bore: 0.866" (22mm)  
  Stroke: 0.772" (19.6mm)  
  Practical RPM: 2000-17000  
  Power Output: 1.65PS, 1.63HP/16000 RPM  
  Weight: 13.2oz (375g) without muffler  
  Weight: 17.2oz (489g) with muffler  
  Recommended Propellers: 10.5x6, 11x6-8, 12x6-7, use 10x6 for break-in
  Crankshaft Size: 1/4-28  
   
  Distance from remote needle to end of crankshaft: 4.7" (119.4mm)  
  Distance from center of engine to drive hub: 2.4" (61mm)  
  Distance from center of engine to end of crankshaft: 3.4" (87.6mm) 
  Distance/crankshaft center to muffler exhaust outlet: 3.9" (100.5mm) 
  Height from crankcase bottom to top of cylinder head: 3.3" (85.2mm) 
  Height/crankshaft center to top of cylinder head: 2.6" (67.4mm) 
  Width including mounting ears: 2" (50.8mm) 
  Width not including mounting ears: 1.4" (35.6mm) 
  Width between mounting holes same side: .69" (17.5mm) 
  Width between mounting holes opposite side: 1.7" (44mm) 
  Diameter of muffler body: 1.5" (38.1mm) 
  Angle of muffler in relation to engine: 4°  
   
NEEDLE SETTINGS: High Speed Needle: 1½ to 2 turns Out from closed position,  
  per page 18 of manual  
   
  Low Speed Needle (aka: Mixture Control Valve): Close the  
  throttle rotor gradually from the fully opened position  
  until it is just fully closed. (Do not turn further.) Then  
  screw in the Mixture Control Screw until it stops. Now  
  unscrew the Mixture Control Screw approx. 3/4 turn. This is  
  the basic position, per page 23 of manual  
   
120AX Ring 70D Carb E5020 Muffler, INSTOCK, 279.99
  This is the O.S. Max Two-Stroke 1.20AX Ringed Engine with Muffler.  
   
FEATURES: Model Application: Ideal for 3D, Precision and Sport flying  
  Mounting Application: Mounts in same space as the .91FX (actual  
  mounting dimensions vary slightly, see SPECS)  
  Internal Construction: Steel piston ring and liner, aluminum piston  
  Muffler: E-5020 "Power Box" with extension and 90° adapters  
  Carburetor: 70D with rearward angled needle valve for safety  
  Glowplug: O.S. #8 supplied with engine, A5 (OSMG2693) will also work 
  Warranty: Two-year limited  
   
INCLUDES: O.S. Max Two-Stroke 1.20AX Ringed Engine with E-5020 Power Box  
  Muffler, #8 glow plug, muffler adapter, prop washer and lock nut,  
  needle valve extension cable,instruction manual and decal sheet,  
  two muffler screws, two muffler extension bolts, two long muffler  
  bolts.  
   
REQUIRES: Fuel: Two-Stroke with 18% lubricant and 5-20% nitromethane  
  Propeller: 15x10-12 or 16x8-10  
  Field Equipment: Glow starter, fuel filter, fuel pump, fuel tubing  
   
SPECS: Displacement: 1.218 cu in (19.96cc)  
  Bore: 1.197" (30.4mm)  
  Stroke: 1.083" (27.5mm)  
  Practical RPM: 1,800 - 9,500 RPM  
  Power Output: 3.1 PS, 3.06HP/9000 RPM  
  Weight of engine: 29.0oz (823g) with muffler  
  Weight of muffler: 7.074oz (219.2g) with 90° adapter installed  
  Weight of muffler: 7.907oz (245g) with extension installed  
  Crankshaft thread size: 5/16-24  
  Distance Between Mounting Holes Same Side: 0.98" (25mm)  
  Distance Between Mounting Holes Opposite Side: 2.3" (58mm)  
  Distance Center of Crankcase to End of Crankshaft: 4.3" (109.5mm)  
  Distance Center of Crankcase to Drive Hub: 2.7" (69.8mm)  
  Width Between Mounting Tabs: 2.6" (67mm)  
  Width of Crankcase Below Mounting Tabs: 1.8" (46.5)  
  Length from Backplate to End of Crankshaft: 5.5" (139.9mm)  
  Length from Backplate to Drive Hub: 3.9" (100.2mm)  
  Height/Bottom of Crankcase to Top of Cylinder Head: 4.3" (109.2mm)  
  Height/Bottom of Mounting Tabs/Top of Cylinder Head: 3.4" (85.7mm)  
  Distance center to center of muffler mounting holes: 48mm (1.89")  
   
  Needle Settings: High Speed: 2 - 2.5 turns out from fully closed  
  Low Speed: 3/4 turn out from fully closed with the 
  throttle fully closed  
   
COMMENTS: For version without muffler, order OSMG0651. The version without the 
  muffler does not include the muffler extension or the 90° adapter. 
  At this time one would not be able to use the muffler extension and
  90° adapter at the same time. The long muffler bolts are too long. 
   
  jxs 10/25/05
  Updated JBM 12-20-05
  updt WM 11/29/05
  ir/jxs
  updt lmm 3/30/09
GT15 Air w/E-4040, ONORDER, 349.99
This is the O.S. GT15 Gasoline Engine with the E-4040 Muffler.  

FEATURES: IG-06 electronic ignition handles 4-6 cell NiCd, NiMH or 2-cell LiPo 
  and LiFe batteries  
  Beam mounting design allows engine to fit inside cowls that are  
  sized for 2-stroke .60-.91 and 4-stroke .90 glow engines  
  Two year limited warranty through Hobby Services beginning at date  
  of purchase  

INCLUDES: GT15 Gasoline Engine with E4040 Muffler, IG-06 Ignition Module  
  CM6 Spark Plug, 61H Carburetor, and Instruction Manual  

REQUIRES: 2-cycle oil, see SPECS  
  Gasoline: Regular, no need to use high octane gasoline  
  Ignition Battery: 4.8-8.4V NiCd or NiMH, 6.6V LiFe or 2S 7.4V LiPo  
  pack, LiPo battery requires voltage regulator  
  Propeller: 13x8-11, 14x8-10, 15x8  
  Electric Starter  
  Gasoline safe fuel tubing and fuel filter  

SPECS: Displacement: 0.912 cu in (14.95cc)  
  Bore: 1.091" (27.7mm)  
  Stroke: 0.976" (24.8mm)  
  Practical RPM: 2,000-15,000 RPM  
  Weight: 22.26oz (631g) engine  
  6.28oz (178g) muffler  
  3.35oz (95g) ignition module  
  Gasoline/Oil Mixture: 30:1 - 50:1  
  25:1 fuel/oil mixture if brand of oil states 50:1 mix  
  Carburetor Settings;  
  Needle Valve: With engine running, close needle valve as RPM  
  increases, close further 60-90° from point where RPM starts to  
  decrease, open slowly as RPM increases, then open 90° further  
  from maximum RPM point  
  Mixture Control Valve; Open one turn, open and close throttle a few  
  times to make sure there is no resistance, close mixture control  
  valve 30°, repeat open and closing of throttle then open mixture  
  control valve approximately 90°  
  Width at Mounting Tabs: 2.4" (61mm)  
  Width of Crankcase below Mounting Tabs: 1.7" (44mm)  
  Length between Mounting Hole Centers: 0.98" (25mm)  
  Crankshaft Size: UNF 5/16-24  
  Muffler Mounting Angle from center of Engine: 4°  
  Needle Valve Mounting Angle from center of Engine: 30°  
  Length from Pump to Drive Hub: 4.2" (106.2mm)  
  Length from Pump to end of Crankshaft: 5.6" (142mm)  
  Length from Pump to center of Crankcase: 1.5" (39.4mm)  
  Length from Drive Hub to end of Crankshaft: 1.4" (35.8mm)  
  Length/center of engine/opposite side of Muffler: 4.1" (103.3mm)  
  Length/center of engine to side of Cylinder Head: 0.96" (24.3mm)  
  Length between Muffler Mounting Hole Centers: 1.6" (42mm)  
  Length from Crankshaft Center to Muffler
GT33 w/Muffler 33cc/4.384ci Re Carb, ONORDER, 419.99

TECH NOTES

  This is the GT33 Gasoline Aircraft Engine with Muffler and Rear Carburetor  
  from O.S. Engines.  

FEATURES: Electronic ignition accepts LiFe, LiPo, NiCd and NiMH power and also 
  offers low voltage warning  
  Rear mounted Walbro carburetor-NOTE the choke valve rod shown on  
  page 12 of the manual is not included  
  Pitts style E-5030 aluminum muffler black in color, 5dB lower in  
  noise than the competition  
  Two year limited warranty through Hobby Services beginning at date of
  purchase  

INCLUDES: GT33 Gasoline Aircraft Engine with Muffler, Carburetor, CM-6 Spark  
  Plug and Instruction Manual  

REQUIRES: 2-cycle oil, see SPECS  
  Ignition Battery: 4.8-6.0V NiCd or NiMH, 6.6V LiFe or 7.4V LiPo pack 
  LiPo battery requires voltage regulator  
  Propeller: 18x10-12, 19x10, 20x8-10, use 18x8 prop for break-in  
  Mounting standoffs, length depends on aircraft  
  Gasoline safe fuel tubing and fuel filter  

SPECS: Displacement: 2.013 cu in (32.98cc)  
  Bore: 1.417" (36mm)  
  Stroke: 1.276 (32.4mm)  
  Crankshaft thread size: 5/16-24  
  Total Weight: 2.7lbs (1230g)  
  Engine, 34.72oz (984g)  
  Muffler, 5.65oz (160.5g)  
  Ignition: 3.70oz (105.0g)  
  RPM Range: 1,800 - 8,000  
  Output: 3.9 PS, 3.85 HP/9,000rpm  
  Gasoline/Oil Mixture: 30:1 - 50:1  
  25:1 fuel/oil mixture if brand of oil states 50:1 mix  
  Replacement Spark Plug: NGK CM-6 or Denso U20M-U (.020" gap)  
  Height, Crankshaft Center to Exhaust Outlet: 6.1" (156.1mm)  
  Height, Crankshaft Center to Muffler Body: 4.1" (105.4mm)  
  Height, Crankshaft Center to Muffler Mounting Holes: 2.1" (54.4mm)  
  Height, Crankshaft Center to top of Cylinder Head: 4.3" (109.2mm)  
  Length, end of Crankshaft to Carb: 7.7" (196.6mm)  
  Length, end of Crankshaft to Backplate: 6.2" (158.9mm)  
  Length, end of Crankshaft to Center of Engine: 4.9" (125mm)  
  Length, Prop Washer to Center of Engine: 3.3" (84.5mm)  
  Length, Prop Washer to Carburetor: 6.1" (156.2mm)  
  Length, Prop Washer to Backplate: 4.7" (118.5mm)  
  Width, Muffler Body: 4.5" (114mm)  
  Width, Crankshaft Center to Exhaust Outlet: 1.2" (31.5mm)  
  Cylinder Head Diameter, front to back: 2.5" (62.8mm)  
  Cylinder Head Diameter, side to side: 2.6" (66mm)  
  Mounting Hole Centers top to bottom: 2.1" (54mm)  
  Mounting Hole Centers side to side: 3" (76mm)