|Rebuild videos for the later Carter YFA.|
YF Carburetor Identification
When no carburetor number is present, you may be able to identify your carburetor by using the casting number. Keep in mind that the casting number is not definitive. In most cases this is enough to find the correct carbuetor kit, but it's another hint.
Check balls are often placed in the wrong hole, so don't assume you will find the correct size in the particular hole. To figure out which check ball goes in which hole, assuming you have two different sized check balls, look into the bottom of the holes and you should see which hole is bigger than the other. Simply place the bigger check ball in the bigger hole. Be sure each hole has a trough for the check ball to sit into. The check ball has to stop the fluid from going in one direction, so it will need to sit into a beveled edge hole. When there is no bevel, then it probably doesn't need the check ball. Once the check balls are in place you will need to test them to make sure they seal correctly. Use a test fluid, like carburetor cleaner (NOT WD-40), and a small punch to gently hold down the ball on it's seat and depress the pump in it's well by hand. If you get a hydraulic lock then you are good to go. On holes other than the accelerator pump simply watch that the fluid doesn't leak out. When the check ball isn't sealing, then you will need to re-size the hole by tapping on the check ball a couple of times. DO NOT use the new check ball for this. It could become mall formed. Use the old check ball if it isn't corroded or beat up.
Needle & Seat Some of our kits have two sets of needle & seats. One will be spring loaded and the other will not be. Try to use the spring loaded whenever possible, especially on off-road vehicles. The spring type of needle & seat keeps the float from bouncing on a rough road, which will allow too much fuel to enter the float bowl.What is the size of the vacuum advance port located in the throttle body?
The vacuum advance thread size is 1/8" FPT (female pipe thread), same as the fuel inlet thread.
Carter YF & YFA Technical
- Carter YF Rebuild Instructions
- Carter YF Exploded View
- Carter YF Carburetor Specifications
- Carter YF Troubleshooting
- YF Check Weight
- Lack of Power
- YF Jet Sizes
- YF YFA Idle Circuit
- Float Level
- YF Choke System
- YFA Exploded View Non Feedback
- YFA Exploded View - Feedback
- YF Metering Rod Adjustment
- Fuel Bowl Vent Adjustment
- Accelerator Pump Circuit - Hesitation
- YFA Carburetor
- Carter YFA Rebuild Instructions
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