The CA55M-500 mixer no air horn or throttle body. Common on forklifts and small engines. The 4 screws on top and bottom are where your air horn and throttle body mount to, it is more common for the diaphragms in the Propane Carburetor itself to go bad so save your self some time and and money by just replacing the LP Mixer.

 

 

 

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

 

 

If adjustment is needed, follow these steps:

* Set parking brake and block the drive wheels
* Connect a tachometer to engine.
* Accelerate engine to full governed rpm.
* Pull backward on tilt lever until pump reaches hydraulic relief bypass. The rpm should drop according to the spec for hydraulic bypass (typically a 250-500 rpm drop). If the rpm does not drop, check and adjust the hydraulic pressure before you continue.
* Turn the power mixture valve until the highest engine rpm is reached at 0.30 to 0.70 percent carbon monoxide.

 

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.