65CJ5 SRD
Member
- Joined
- Aug 12, 2019
Hi All,
Been a while since I posted anything. I still have the Jeep. Been running it again after a long time and had some questions.
I have 2 carbs. One is the Carter YF which is original to the Jeep and is on it now. The other is a Solex which is being rebuilt again due to bad fuel. I prefer the Carter over the Solex. The following is all in reference to the Carter, not the Solex.
I was having the same stumble when accelerating from a dead stop as I had way back when and have posted about. I finally got around to adjusting the metering rod to see if that helped anything. I tried it as far down as it would go (several people suggested that), and when that didn't help I tried it as far up as it would go. It still didn't help with the stumble. So, I put it back to a middle position where it started.
I tried 2 other things. one was to clean out some light gray, powdery sludge from the bottom of the bowl. Not sure where that came from, but the fuel in the tank was really old. I replaced with fresh fuel, and put on a new filter and new regulator. I use a regulator since I'm using an electric fuel pump. I also put in the small rectangular gasket that goes on the flat bar thing inside the carb. It wasn't on there from the last rebuild it had done. After those 2 things, I seem to have fixed the stumble off a dead start.
However, the YF is still prone to flooding. From what I could find online, the YF has a pressure spec of from 2.5 to 3.75 psi. I originally had it set to 3, but it was just too much for my carb. I tried setting it to 2 psi and it was still flooding. I tried it at .5 psi (the lowest the regulator can do) and that stopped the flooding but it also ran out of gas before the bowl could refill. So I set it to 1 psi and that seemed to keep it from flooding and didn't starve if of fuel. But I don't trust it.
Float looks OK, no fuel in it, no bubbles when submerged in hot water. Float pin looks OK.
At this point I suspect the needle and seat just aren't up to snuff. The needle it has is a simple metal one with a rubber tip and it looks fine. No crud in the seat, it's clean. I can hold the top of the carb upside down and blow into the fuel inlet and it stops me from being able to blow into it. Hold it right side up and it lets me blow air through it. But I can't give it the pressure the fuel pump can when I test it upside down.
I have another needle and seat in the rebuild kit that has a larger needle that uses a small spring and plunger in the top of the needle. I'm wondering if that is the one I should be using?
My question would be, what type of needle and seat are you guys using in your YF carbs? Mine is an early carb with manual choke.
Thanks!
Stan
Been a while since I posted anything. I still have the Jeep. Been running it again after a long time and had some questions.
I have 2 carbs. One is the Carter YF which is original to the Jeep and is on it now. The other is a Solex which is being rebuilt again due to bad fuel. I prefer the Carter over the Solex. The following is all in reference to the Carter, not the Solex.
I was having the same stumble when accelerating from a dead stop as I had way back when and have posted about. I finally got around to adjusting the metering rod to see if that helped anything. I tried it as far down as it would go (several people suggested that), and when that didn't help I tried it as far up as it would go. It still didn't help with the stumble. So, I put it back to a middle position where it started.
I tried 2 other things. one was to clean out some light gray, powdery sludge from the bottom of the bowl. Not sure where that came from, but the fuel in the tank was really old. I replaced with fresh fuel, and put on a new filter and new regulator. I use a regulator since I'm using an electric fuel pump. I also put in the small rectangular gasket that goes on the flat bar thing inside the carb. It wasn't on there from the last rebuild it had done. After those 2 things, I seem to have fixed the stumble off a dead start.
However, the YF is still prone to flooding. From what I could find online, the YF has a pressure spec of from 2.5 to 3.75 psi. I originally had it set to 3, but it was just too much for my carb. I tried setting it to 2 psi and it was still flooding. I tried it at .5 psi (the lowest the regulator can do) and that stopped the flooding but it also ran out of gas before the bowl could refill. So I set it to 1 psi and that seemed to keep it from flooding and didn't starve if of fuel. But I don't trust it.
Float looks OK, no fuel in it, no bubbles when submerged in hot water. Float pin looks OK.
At this point I suspect the needle and seat just aren't up to snuff. The needle it has is a simple metal one with a rubber tip and it looks fine. No crud in the seat, it's clean. I can hold the top of the carb upside down and blow into the fuel inlet and it stops me from being able to blow into it. Hold it right side up and it lets me blow air through it. But I can't give it the pressure the fuel pump can when I test it upside down.
I have another needle and seat in the rebuild kit that has a larger needle that uses a small spring and plunger in the top of the needle. I'm wondering if that is the one I should be using?
My question would be, what type of needle and seat are you guys using in your YF carbs? Mine is an early carb with manual choke.
Thanks!
Stan
