Quote:
Originally Posted by KULTULZ
Reminds me of Yosmite Sam who shoots his horse after not stopping at his first command.
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LOL Yosemite Sam huh. "All right, all right, I'm a thinkin'! And my head hurts."
Quote:
Originally Posted by KULTULZ
You have not come across fuel evaporation in carbureted cars yet?
Fuel will drain through the needle and seat if the seat is damaged or the float setting is incorrect.
To check for a carb leaking down (bad bowl plug or cracked housing), simply shine a lite down the carb throat soon after shutdown. If the plenum floor is wet or puddled, you have a leak-down.
This problem (evaporation) is very common on a LINC specific forum with AFB's.
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I haven't used a Carter AFB but I had an Edelbrock Performer on my 460 for a few years. Initially it had a hot-start problem that was solved with the 'phenolic' (wood) spacer, but I've never ever had a carb evaporate completely dry after a matter of days. I could let the Bronco sit for a week and it would still fire on the first crank. My pickup normally sits for weeks at a time out in the direct sunlight and summer temps, and it's always fired right up, never had a problem with it evaporating off completely. Granted, it has an electric fuel pump, but I don't give it time to fill the carb, I just put the key in and crank.
The needle and seat are located well above the floor of the fuel bowl on every carb I've ever worked on (Edelbrock, Holley, Quadrajet, motorcycle and other small engine carbs), making it impossible to drain the fuel bowls through the fuel inlet. You might be able to skim a little fuel off the top before the level gets down to the needle and seat, depending on the carb, but it would never be able to drain enough out to cause a no-start condition.
It could complete evaporation due to boiling like you're saying, but would have to happen before the engine cools off, because I still don't think 'normal' evaporation would drain the bowls in 3 days. In that case, if he waited anything more than a couple hours, he would have this condition. A leak, on the other hand, could take any duration depending on the severity of the leak. You may not be able to see anything out of the ordinary immediately after shutoff, and as soon as you crack the throttle open the accelerator pump will squirt making it impossible to find a puddle from the leak. The only good way I know of to check for a leak is to take the carb off the vehicle with it full of fuel and set it on a box or something to watch for the wet spot/drips. I could be wrong, maybe my inexperience with the Carter AFB is showing through here, but I was under the impression that they were more or less identical to the Edelbrock Performer carbs.
