1950 Willys Truck re-rebuild by 50wllystrk

4 minute(s) of a 620 minute read

I want to get more pictures of the choke system on most all carbureted engines.

On this particular carb, it uses a cable to set the choke, simply pull a lever and the choke plate closes. There is one other thing that happens when you pull the lever, it's called "high idle". When the choke plate is closed, at the same time there is a wedge/cam that raises the idle speed.

A look at the choke plate open.

Now a look at the choke plate closed.

You can see the plate blocks the air supply very well. This produces a very rich mixture which is needed to start a cold engine

As you can tell, if that choke plate doesn't get opened just a little bit, it will flood the engine if it doesn't get air soon after start up. When this engine starts to run rough soon after starting, push the choke lever in a little bit to allow air into the engine, but not so much that you fully open the choke plate, it still needs to warm up.

This is a manual choke carb, by hand, all this happens.

Now, anybody want to venture as to how an automatic choke sets the choke plate closed?

Then after the vehicle starts, how does the choke plate open to allow some air to enter so the vehicle doesn't flood out from too much fuel?

Remember, with the automatic choke, you have no cable to control the operation

3-20-2012

cooter402.....It's good to hear from you again.

As I grew up in the '70s, working on cars and trucks, and now that I flash back to that time I remember removing the automatic choke on projects. Yup, it was the cool thing to do, remove that crap, it's just in the way.

Ha,ha, truth was, we didn't know the function and the workings of the automatic choke, so the tough guy thing to do was to remove it. Truth was, I lived up north where it was much colder, I can't count the days that I had to play with the throttle for the first couple minutes to keep the enginerunning.

If I knew what I was doing, I would have set up the automatic choke and started the vehicle and ran back inside where it was nice and warm til the vehicle warmed up.

I have to gather some pics and we'll get into the automatic choke. In the meantime, Read the enthusiasm that Scooter402 displayed in his reply above.

Once your knowledge grows in all these areas we've covered in this thread, it's like I've mentioned before, you look forward to reading and being involved in the theory and the inner workings of stuff, instead of backing away and being a shadow in the distance.