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CCKW C is fifor rugged waIt was in the vacuum erator Pump Circuit, compar echanical operated of the Die Cast Carburetor.
A th a Die Cast Carburetor is easier to start, especially if the CCKW has set ks.

There are two times when the vac drops and the cast iron carb gives a shot of gas:

1. When running and you want to accelerate and press down on the pedal AND
2. When you shut the engine off and it coasts to a stop.

I had an M151A2 I could not figure out why it started soooo hard and seemed to be flooded when hot till I looked into the carb when I shut it off....

RANGER wrote:The Cast Iron CCKW Carburetor is fifor rugged waIt was in the vacuum erator Pump Circuit, compar echanical operated of the Die Cast Carburetor.
A th a Die Cast Carburetor is easier to start, especially if the CCKW has set ks.

Huh??

With the mechanical acc pump, if there is fuel in the bowl, you can inject it into the engine by pumping the pedal a couple times prior to cranking the engine.

With the vac operated cast iron carb, you cannot 'pump' raw gas into the engine unless it is running and has vacuume.