Engine cranking

I may have a unique solution to this extended-cranking problem. I'll post something on the subject later when I get more information.

Mark

This is an interesting issue and I think is a common problem (along with vapor lock) with many makes of cars from the late 1930's when they first changed to downdraft carburation.

My 1932 Auburn (with the updraft carburetor) does not experience this cranking problem. The car does not have an electric pump and will start in a few seconds after sitting for a month or more. It never experiences vapor lock and (after warm up) re-starts in less than one revolution no matter how long or short a time it sits.

Since the engines in the later Auburns are basically identical to the 32's except for the manifold system, it makes sense to me that the fuel is percolating out of the (downdraft) carburetors after the engine is turned off due to rising heat from the exhaust manifold. This being the case, an electric pump for priming purposes (as previously suggested) appears to be the proper solution.

Steve Stevens

I took my electric fuel pump off in an attempt to keep everything original on the car. Maybe this was a mistake.
On the other hand, if the float bowl is full, I don't see why it should have to crank so long. Any other suggestions?

Mark

One solution is to add an electric fuel pump. Before starting it turn on the pump for a short period of time, say five or six seconds. Turn it off and then try starting it.

HELLO YES EVERYONE HAS THAT PROBLEM. RANDY EMA

I have a 36 Auburn with a rebuilt engine and new fuel pump. When I go to start it after letting it sit for four days, it seems to take an eternity to fire up. With the carb at full choke, it takes about 30 seconds to finally fire. It runs fine after starting, by the way.
On another 8 cyl. Auburn I own, the former owner installed a small tube into the air filter for the purpose of giving the carb a shot of gas before starting.
Does the gasoline drain out of the float bowl overnight? Has anyone else had this cranking problem?

Mark