I'm rebuilding the zenith carbs in a '71 911T… but I discovered something intriguing concerning the little accelerator pump check valves under the injector. I found all three in one carb just lying in the bottom of the float bowl - not where they belong, and in a place where they were clearly put by a previous owner, cause it would be impossible for them to come out of their correct position once the carb was bolted together. (note - I have not yet put the new o-ring on the clean injector in this photo)
Also, in the other carb all three check valves were totally missing - no where to be found ??
Here's my question - how does this valve actually work and why do I need it ? I have been driving this car for 20 years without any - apparent - trouble with throttle response, acceleration, etc. Although maybe if there were a subtle problem I wouldn't know it… which suggests (maybe ?) this valve performs an insignificant function - if any ?
Finally, if it is important to include this valve in the rebuild does anyone know where I can buy just three ? Oh, and I also need one fuel strainer for the banjo fitting.
Thanks for any advice/help.
