Guys, I thought I would pass some information that I have recentlly learned messing with my alky carb. I'm new to this stuff so this may not be the gospal but hope it may help someone. I bought a used alky carb to dyno my 468 with from a buddy. He had only ran the carb one weekend and went back to gas saying he didn't like the alky. I had noticed his motor never idled right on with carb and had a huge stumble on takeoff. The price was right on the carb so I figured I could fix it. My motor acted like it wanted to jump off the dyno below 3000 rpm so I new something wasn't right with it. I called the guys who built the carb and they sent some different emulsion bleeds for it, that made no change in it. I got tired of messing with it and borrowed an APD alky carb from a buddy. The thing fired right up and idled like it was on gas and was a complete different motor with his carb. He told me the guy that had it was bad about overtightening stuff and had warped the main body sealing surfaces on his gas carb and messed up the idle on it since the gaskets wouldn't seal. The builder told him to have the sealing surfaces flycut and it would fix it. He took a file to them and fixed the problem with it. Since the same guy owned this alky carb, it seemed like that would be the problem. I filed them flat and threw new gaskets in it and it made no difference. My buddy came over to help me with it and it would run good after we took it apart and blew air threw all of the holes in the metering blocks. I decided to drill small holes in the throttle blades so I could close them up a little and have better control over the idle mixture. Put it on and it ran like heck, same horrible fat idle and a horrible studder at tip in. When I took it off I noticed some white junk coming out off the squirters when I pumped them dry. Took it apart and they were full of the white crud that the alky leaves behind when it drys up. I figured that stuff got under the needle and seats and caused some flooding. I new that carb cleaner won't touch this stuff, so after some head scratching, I decided to use something on it that would disolve calcium since that is what the alky leaves behind when it drys. It's hydroscopic, meaning it absorbs moisture from the atmosphere. I know it seems kinda jickey, but I used CLR to clean that stuff out and it worked like a champ. We put it back on and it ran good for a while but acted the same yesterday when I tryed to warm it up to change the oil in it. This thing is driving me nuts by know, I'm just about out of ideas. Since it always ran good for a while after we cleaned the metering blocks out I thought maybe that stuff had plugged something up in one of them and just wouldn't come out with the air pressure. So, I soaked both of them in the CLR for about an hour and a half, washed them out with hot soapy water and blasted em good with the garden hose and blew them dry with compressed air. Put it back together and shazaam, she idles great and takes throttle like the race motor that it is. I've decided that I'll have to remove the carb and flush it with gas thru the vents and pump it thru the accelerator pumps to make sure I don't have these problems in the future. Sorry for the long post, but I thought the whole story would show the problems you can have if you don't do some maintenace with the alky. Thanks for reading, L.T.