I mentioned these metering lever set gauges the other day in a thread just thought I would put a picture of them up and explain what little I know about them. Please keep in mind I have not used one yet but hopefully I will with success this weekend. I ran across these while troubleshooting a WAT walbro carb that I rebuilt. That's when I found the metering lever was not to be set level with the floor of the carb but higher. I also found the same about the HDC however at the time I had them confused. Looking at the gauge the HDC would set on the straight edge side of the "W" laying across the outer body of the carb which would have it above the floor. Now I haven't tried this yet but if I decide to fix the XL I got I will but I am thinking its going to be a parts saw. The LX30 Bandit I have has the WAT carb. Looking at the gauge it also sets a little high off the floor of the pump body but not as high as the HDC. It should set by the middle leg of the "W" which is just a few mills below the outer carb body. Now what information I am giving here hopefully isn't wrong but it is also not from experience. I just read this stuff in a Walbro service manual on Walbro's website. I hope it helps somebody along the way and I also hope that if someone here has experience with these things they might could offer some more info. Anyway I bought them in a set on Amazon because of the price. it was 12 bucks for the two where as I was finding just the Walbro for 8 and 10. I have only rebuilt one Zama didn't really have any issues and its the only one I have. One plus side to these is if they are totally useless they do have a hole in them you can turn them into a nifty key chain.
Ok first is I will correct myself on the WAT carb which is a WTA I don’t know how or why I haven’t caught that before now. I did use that tool on a WTA today, one I’ve been having trouble with and it seemed to set just fine. With the tool the metering lever was just a touch above the floor but I can’t say if you set it with the floor that it wouldn’t work. I can say that it was not the source of my problem either. The low (if memory is correct) idle screw was only about 1/4 turn out. I had also read when putting a diaphragm kit in a carb to leave the hi low settings alone as they are likely right or very close to where you need to be. In the case of this saw that was very wrong, once I set them 1 turn out it fired up, I made a few minor adjustments and now the Bandit is running fine