Posted by Hobo,NC on December 03, 2017 at 18:38:55 from (75.136.231.157):
I have had the same issue the last 5 years on my 77 f350 it did not show up till I replaced the engine I used the original carb on the replacement engine. I have been into the carb 3 times never could find are make it leak so lived with it. I worked on a Jeep a few weeks ago that had the same carb a nice rebuilt good working carb the owner said he was going to put a 4 BRL on it. I ask for the carb a few days later it was laying at my front door :)... I put my jets in the replacement and ITS FIXED no more burning a starter UP trying to start it.
I have checked the old carb every way I know how I never could find a problem with it other than I had set the float too high. I have replaced and checked the fuel pump never could find a problem with it. Mine has a seat tank no way it can drain back up hill its a mystery that had something to do with the carb. NO DOUBT the carb did not have fuel in it as much as I had to pump it if it had fuel in the carb it would have flooded it. On my 390 coolant flows thru the carb spacer between the carb and manifold I once thought the heat from the coolant may be a problem evaporating the gas from the carb when I shut the engine off I never tried to bypass the spacer.. The Jeep carb had a 1/4" insulator between the carb and spacer I could have used the insulator if I had found some longer mounting studs but did not use the insulator. The other problem is sometimes it will not start till you let off the ignition switch I have checked it never found a problem with it. It does not do it every time so learned to deal with it. I drive it 1000 miles a year its old its a FORD I have never had a OLD FORD truck I did not have to work on it more than I drove it...
The problem reminded me of a Chrysler thermoQuad the seals would dry out and empty the float bowl overnight and never have a indicator the engine was flooded with fuel.
When a Ford power valve leaks I have always been able to tell but not on this one once started it ran great with no indication of ruining rich. I am not going to rule it out I did replace it and did all the shadtree checks I know of of check the power valve.
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Today's Featured Article - Earthmaster Project Progress Just a little update on my Earthmaster......it's back from the dead! I pulled the head, and soaked the stuck valves with mystery oil overnight, re-installed the head, and bingo, the compression returned. But alas, my carb foiled me again, it would fire a second then flood out. After numerous dead ends for a replacement carb, I went to work fixing mine.I soldered new floats on the float arm, they came from an old motorcycle carb, replaced the packing on the throttle shaft with o-rings, cut new ga
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