Impco CA55-258L Is A 90° Dual Fuel Mixer With 2-1/16" Inlet And Outlet Adapters To Install In The Air Cleaner Hose.
   
  IMPCO CA55-256L Carburetor specifications:
   
  The Impco CA55-258L is a 90° dual fuel mixer with 2-1/16" inlet and outlet adapters to install in the air cleaner hose. When using the CA55-258L the existing gasoline carburetor throttle is used to control fuel flow. A lifter cable is required for gasoline operation.   	 		 			 			Specifications 			 |  		
 		 			| Fuel Type |  			LPG Vapor or Natural Gas |  		
 		 			| Nominal Inlet Pressure |  			-1.5" w.c. (-0.37 kPa) |  		
 		 			| Operating Temperature Range |  			-40° F to +250° F (-40° C to +121° C) |  		
 		 			| Mounting Position |  			Vertical |  		
 		 			| Horsepower |  			Up to 73 hp (54 kW) @ 118 CFM (55.7 L/s) and 2.0" in Hg manifold depression |  		
 	 
     
   
   
  DESCRIPTION
   
   
    	 		 		 	 	 		 			| SPECIFICATIONS |  		
 		 			| Fuel Type |  			LPG Vapor or Natural Gas |  		
 		 			| Inlet Pressure |  			-1.5” w.c. (-0.37 kPa) |  		
 		 			| Operating Temperature Range |  			-40ºF to +250ºF (-40ºC to 121ºC) |  		
 		 			| Mounting Position |  			Any |  		
 		 			| Diaphragm Material |  			N/A |  		
 		 			| HP/kW Rating |  			Up to 75 hp (55.9 kW) @ 118 CFM (55.7 L/s) and 2.0” Hg manifold depression |  		
 	 
       
  
 The idle air fuel mixture is best adjusted only with a engine CO exhaust analyzer and the mixture should be adjusted to 0.30 to 0.70 percent carbon monoxide.
 
 Alternate Method:
 * Adjust idle to 400-500 rpm
 * Turn idle air screw out until engine starts to run rough.
 * Turn idle air screw in approximately ¼ turn to ½ turn or until engine smoothes out.
  
   
       
     
CA55-258L MIXER
   Cross References
  
     INLPG-1110, LP233-6016, MPCA55-258L, SY58785