classic_cruiser

Here are a couple pictures of the innards. I’ve taken pictures each time I had it apart, to keep track of the original state and how I’m changing it. The last time, I put a check ball in the pump discharge nozzle, and ran it today. It did not seem to run badly. It did not seem that there was a clip to hold a check ball at the base of the accelerator pump, so I have not put one in at this point. The accel pump is also missing the spring and the clip at the top, which may be what makes it stumble when the throttle is applied quickly. Any idea which specific model this could be?

Jon, unfortunately it is not stamped besides the AAV-26 on the base. There are no stamped numbers in the cover near the accelerator pump like I’ve seen on others. I do not know the history, so I have little to go on. I’ve taken some pics and attached, I also have a few of the innards when I had it apart. Any idea which one this could be? I’ve not heard of unstamped ones, and it doesn’t look like a stamping was removed.

I know this thread is rather dated, but I came across it by accident searching for AAV-26 info. I have an AAV-26 that is on this 1937 LaSalle engine I bought, and it used to idle but would die when you hit the throttle when hot. I took it apart to clean it out (was full of sediment) and I also noticed - like the original poster of this thread - the check balls were missing at the bottom of the accelerator pump cavity and the one under the pump discharge nozzle. The pump inlet check valve was present though. I also wonder how this thing even ran. Was removing these check balls a way to work around other problems with this model of carburetor? Terry

That's a keeper there... I'd love to find a 37 like that down my way!