Im getting ready for a rebuild. is there any way to drain the bowl of fuel before i place it on my work bench? Maybe even be able to save is so as to squirt it back in upon re-firing it up? 67 Carter 4 barrel from a 340 buick thanks
I took mine off and turned it up side down till it quit comming out then put it on the bench. shouldnt be more than a cup in there.
there is carb cleaner that can be bought at the auto supply,,, and some guys like me,,, use lacquer thinner... but be carefull, because lac thinner is flammable.... but then so is gasoline.... dont use vinegar at all , it is acidic alright, but it is also water based,,,, and water and carbs dont mix... also the acid would have to be neutralized to keep it from corroding the metal.... dont use it.... lac thinner will evaporate so will mineral spirits.... but blowing the carb out with compressed air after soaking it is what really cleans it....
Thanks for the info doc. What about boiling water with lemon juice. Someone on another post said that worked wonders for them. I just rebuilt my carb yesterday and used 2 gallons of carb-cleaner that i bought from the auto part store. Stunk up my whole block with fumes... But the parts cleaned up really nice. I blew it all out with compressed air and let it air dry for about 30min. When i re-installed the carb, it caused the engine to shake, like a vacuum leak was present, so now i need to track down that problem. a few things i need to go back and do. Adjust the floats properly, add the o-ring to the choke housing, and loosen the choke piston as it is currently stuck open!
Dont use anything that is water based,,,, water/and anything else will corrode the inside passages of your carb and will destroy it... use only petrolieum based cleaners.....:Smarty::Smarty:
That screw sets the idle air.... and the engine speed at idle.... makes a wonderfull sucking sound that a lot of people mistake for a supercharger.... they came on 1958 mercury turnpike cruisers... and on Buicks.... I think they are the primary carb on the 2x4 set up..... but not sure about that.....
Looks like where mine was, that screw has completely broken off. 1. Should i replace and tap the hole to put a new screw in 2. How important is it to have that screw operational? 3. How do you tune the carb with a third screw? thanks
HMMMM,,,,,, I cant imagine how some one would break off one of those big ,heavy screws.... it is probably a odd ball thread.... but,,,,,,,,,, i actually have one laying around here somewhere, if i can find it.....I have had it for 50 years or so.... aint nothing wrong with it....do you have a spring to go under it....????I dont have the spring.....
Careful now, not all AFB's have the third screw. The '67 Chassis Manual does not show it...the rest have a cast in boss where the screw is on some models. http://www.classicpreservation.com/Images/AFB.jpg Devon
I'll have to take a closer look. But it looks like when a head of a screw breaks off there is one side that is a little jagged. That's what it appears to be. I read that sometimes they get corroded and break off due to the fact that the screw is a different metal than the body of the carb. o No:
Yep,,, Dev is right ,,, not all afb's have it.... but I just figgured that the guy could look at it and tell if did or not.....:laugh:
