Just got a new Carter yf today. Can not get any vacuum except where the choke heat tube hooks up. Don't know if its something i did wrong or the carb is messed up. Anyone have an idea? It is on a 223 with a 240 points dizzy. It is a Chinese carb that had very good reviews, so i took a chance
Carter YF vacuum issue
- Thread starter sixbangr
- Start date
Did you open up the carb base mounting of the 223 intake any? One of the most common things is using the wrong type of base gasket that doesn’t have the needed passageway going into the Carb Hole so then it just cant get any manifold vacuum signal. Good luck
The ported vacuum is probably not drilled into the carburetor bore. I matched up the location and size from my old carb and used a Dremel to drill the hole on my China carb. I had to remove the throttle blade and it still wasn't easy. Otherwise the carb works good out of the box.
Is the hole supposed to line up where the vacuum hose fitting is? I can see a small bump inside the bore that lines up with that fitting. i thought about drilling it out but seems like that would make it manifold vacuum. It would be under the throttle blade
I didn't change anything on the intake, still using the stacked gaskets, just used a new one under the carb. It has two passage ways on the bottom and they both have a groove that exits into the intake.
Do you have the original carb to measure the hole location (height and angle from the throttle shaft)? I measured from the base of the carb but had to adjust the height because the throttle shafts were at different heights from the carb base. The ported vacuum fitting should not have a slot in the gasket. It would have been easier to drill from the outside and seal the outside drill hole but I didn't have a fixture to do it accurately. I really just used the Dremel to "center punch" the hole with a small ball head diamond bit and basically drilled and reamed the hole by hand with a Dremel drill bit.
Thanks for your help. I double checked everything to be sure there was no hole. It just went from the tube to a hole in the base plate. It was covered by a gasket. I marked where it needed to go and pulled the throttle plate and drilled it. That tiny drill bit moved on me so it was a little to high so I shimmed the throttle blade with a piece of copper and it was just right. It works like it should, very happy right now. When the weather changes i will test it. THANKS
got it running, drove it a couple times, tweaked things a bit. Not good at all, idles great, revs great. But second and third both have a big bog from the start. Gets better when it gets going. Have not looked in the bowl to see how it is set up. Maybe I should
You will probally need to tune on the acelerator pump shot amount and duration. With a bigger Carb it maybe to much pump shot causeIng the bogging or it can also be from not enough of a shot. Check that the float level is right also. Best of luck
Both the float and the pump were way off. Just now drove it and it is almost perfect. Has a minor bog shifting into third. Will go back and put in a better screw for the metering rod adjustment. It has a slight bend when you get it where Mikes Carb says it should be. Many thanks for the help
Congratulationfs sixbanger! Since I think you are one of the very first to do one of these installs on a 223 six. Be sure to update us somemore when you can on how you like it's drivability and where your fianle tuning ends up at. This will be some good baseline info for any other site members that might want to try it on their 223 sixes. It should be a very good combo with your 240 six distributor swap. Best of luck
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