OUTFXD Posted November 6, 2022 Report Share Posted November 6, 2022 Been paying a lot of attention to the fuel system lately. Noticed some wetness at the foot of the carb. It seems to be where the accelerator pump linkage goes into the bottom of the float bowl. Anyone have experience with this? Any suggestions on a fix? Thanks in advance! Quote Link to comment Share on other sites More sharing options...
Sniper Posted November 6, 2022 Report Share Posted November 6, 2022 Type of carb? Quote Link to comment Share on other sites More sharing options...
OUTFXD Posted November 6, 2022 Author Report Share Posted November 6, 2022 Its a Carter B&B1. Quote Link to comment Share on other sites More sharing options...
Sniper Posted November 6, 2022 Report Share Posted November 6, 2022 Ok, had to go look at my carb rebuild write up to refresh my memory. Float level too high, or a sunk float. 6th and 7th pictures will help you http://www.yourolddad.com/carb-rebuild 1 1 Quote Link to comment Share on other sites More sharing options...
Racer-X- Posted November 8, 2022 Report Share Posted November 8, 2022 Do those leather plungers and leather parts stand up to ethanol? On the Weber DG series carbs, the accelerator pump is one of the first things to crack and leak if you feed it ethanol blended gasoline. 1 1 Quote Link to comment Share on other sites More sharing options...
Booger Posted November 8, 2022 Report Share Posted November 8, 2022 1 hour ago, Racer-X- said: Do those leather plungers and leather parts stand up to ethanol? On the Weber DG series carbs, the accelerator pump is one of the first things to crack and leak if you feed it ethanol blended gasoline. they do not like corn gas. but float adjustment seems to be at fault. thanks to professor Sniper. I plan on rebuilding a DH1 over the winter just to have a spare handy Quote Link to comment Share on other sites More sharing options...
Booger Posted November 8, 2022 Report Share Posted November 8, 2022 snug up those mounting nuts to manifold 1 Quote Link to comment Share on other sites More sharing options...
rallyace Posted November 8, 2022 Report Share Posted November 8, 2022 When reassembling the carb, you will want to set the float about 3/32" lower than the spec. New fuels, especially ethanol enhanced fuels, are less dense than the gasoline available when these carbs were built and the float will not sufficient force to the needle to fully shut off the fuel inlet. The float has to be set lower to compensate for this. One more thing, the two check balls are not the same size. The smaller one is for the accelerator pump check valve. 1 Quote Link to comment Share on other sites More sharing options...
OUTFXD Posted November 10, 2022 Author Report Share Posted November 10, 2022 I got enough fuel leaks taken care of, looks like the gas is leaking from the pivot from the butterfly that links to the accelerator pump, eg, Time for a new carb. Quote Link to comment Share on other sites More sharing options...
OUTFXD Posted November 13, 2022 Author Report Share Posted November 13, 2022 So scratch that. Today drove to the gas station. She was doing her standard "Out-o-fuel" thing (Even though I had 3/4 of a tank). I put a splash of gas down the throat of the carb to "encourage" the fuel pump to work and about half the fuel splashed out from under the fuel bowl and onto the manifold. Now, when I rebuilt the carb I did a pretty thorough job cleaning it. I am pretty sure I would have noticed A crack in the body. I guess I will pull the carb off one more time to see whats what. Quote Link to comment Share on other sites More sharing options...
OUTFXD Posted November 13, 2022 Author Report Share Posted November 13, 2022 New thing I noticed. When I "Prime the pump" (ie splash some gas down the carburator) with the engine hot., I hear a hiss and can observe "steam" coming from the carb. This leads me to believe that, AT OPERATING TEMPERATURE, I am getting fuel boil caused by heat from the manifold. Is my assumption correct and is that how our cars are supposed to work? Theories? Advice? Experience? Place to source a "new" replacement carb? Quote Link to comment Share on other sites More sharing options...
JohnTeee Posted November 27, 2022 Report Share Posted November 27, 2022 (edited) Two thoughts from my reading . . . How's your heat riser assembly? Could it be diverting heat all the time to your intake manifold. @keithb7 has a good video about this (just finished watching it, again) and you can search the forums. Oh. Also a good link in the reference section. Also, there is a heat shield for the fuel pump . . . I think wrapping the fuel line (picture foreground, left side) in foil tape. Cheers! John Edited November 27, 2022 by JohnTeee 1 Quote Link to comment Share on other sites More sharing options...
OUTFXD Posted November 27, 2022 Author Report Share Posted November 27, 2022 2 hours ago, JohnTeee said: How's your heat riser assembly? Could it be diverting heat all the time to your intake manifold. On First inspection I was rusted to the point it couldnt move and the bimetal "spring" wasnt even attached. I shot it with penetrating fluid, let it soak, I could get it to move but it was tight. Then I noticed that in the video the heat riser rotated about 90degree, Mine rotated something close to 270degree. I think its safe to assume the heat riser assembly is shot. However with Christmas coming, Pulling the manifolds is not financially viable so will have to wait until next year. 2 hours ago, JohnTeee said: Also, there is a heat shield for the fuel pump . . . Okay that is cool and also not present on my car. Is this a stock piece? Do you have a source for buying one? 2 hours ago, JohnTeee said: I think wrapping the fuel line (picture foreground, left side) in foil tape. done and done. I wrapped mine (from fuel pump to carburator) in 500degree heat sheath. Thank you for all the input! Quote Link to comment Share on other sites More sharing options...
JohnTeee Posted November 28, 2022 Report Share Posted November 28, 2022 7 hours ago, OUTFXD said: Okay that is cool and also not present on my car. Is this a stock piece? Do you have a source for buying one? Don't know the answer to the stock question or recall if mine came with it or I added on down the road. However, I did remember that it lived in Downloads and here it is: John 1 1 Quote Link to comment Share on other sites More sharing options...
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