O.S. GT15 (61H) W/E-4040 Silencer

This is the O.S. GT15 (61H) Gasoline Engine with the E-4040 Muffler.OS38160         
                                                                             
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                          
                                                                             
Specifications:   
Displacement: 0.912 cu in (14.95cc)                                
Bore: 1.091" (27.7mm)                                              
Stroke: 0.976" (24.8mm)                                            
Practical RPM: 2,000-11,000 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
time 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 Outlet: 4.4" (112.3mm)