High-low Adjustment screws aren't screws...

[DougPunchak]

I'm having a problem where my backpack leaf blower only idles, but does not run when I pulled the trigger. Spark arrestor is clean, air filter is clean, fuel filter is clean, carb is clean.
I was thinking about adjusting the high and low screws but I can't because they're not screws. Does anyone know what tool I can use to adjust these? It doesn't look like a PacMan screw
Any other suggestions are welcome.

 

[ILENGINE]

Similar to pacman tool but instead of a pacman mouth there is a pin off of the edge of the tool that gets inserted into that hole in the screw.

 

[Scrubcadet10]

https://www.amazon.com/Carburetor-Adjustment-Screwdriver-Lucky-Seven/dp/B086ZFZMBP/ref=sr_1_2_sspa?keywords=2+cycle+adjustment+tool&qid=1665857435&qu=eyJxc2MiOiIwLjAwIiwicXNhIjoiMC4wMCIsInFzcCI6IjAuMDAifQ%3D%3D&sr=8-2-spons&psc=1

 

[DougPunchak]

Thanks all. Kinda funny the tool shape\type is called eccentric.
Any other thoughts as to what the issue can be?

 

[sgkent]

yes, is it possible you are using the wrong tool? I see a lot of scratches, ding, divots and otherwise.

 

[StarTech]

It called an "A Circle" and ScrubCadet has linked the kit of tools that has it in it.

 

[DougPunchak]

By other options I was asking if the carb adjustment isn't the problem, what else I can check . It's not quite a year old but the fuel line and airline that also goes in the tank could probably be replaced. Seems to be a bit deteriorated. Diaphragm is good
Could I put clean gas and run it temporarily without the fuel filter?

I bought the kit and hoping this will fix the issue. Thanks again everyone.

 

[StarTech]

I have seen newly carburetor repair kits to go bad in a few weeks. There more involved than just slapping in repair kit. First carburetor must be cleaned. The metering lever must be set correctly and the mixture settings set. And these mixture adjustment can change with a few days after a new repair kit is install and fuel mix is present. It is one reason I don't return a machine for a few days to let things settle in.

As for diaphragm being good it is relative as new one to go bad within a few days. You must how they should be normally. I had one from a new Walbro kit to go bad in a week this year. It all depends what is in the fuel mix. There is a lot additives in today's fuel that can damage rubber components.

As for running it was without the fuel filter it is not advisable as there can still be trash in the fuel tank that can clog the tiny passages in the carburetor. Example: I use drive 79 Chevy Malibu that had a paper filter at the carburetor that would clog up everytime I ran unleaded plus fuel through it. It happen so much I keep the tools and filter in my truck. Good thing too as one time was on the interstate out of Knoxville when the engine stalled due to filter being clogged.

Without knowing carburetor it is or what equipment is on I would not know if it is a Clone of a Walbro or Zama. I personally haven't seen the A circle mixture adjustment screws here yet. Of course I haven't seen the octagon Stihl mixture screws either but I already added that tool to my collection.

The EPA requires these crazy adjustment screws and think every machine is prefect out of the factory which they are not. I have seen replacement so out adjustment that they will barely work as a will start setting.

 

[ILENGINE]

Without knowing carburetor it is or what equipment is on I would not know if it is a Clone of a Walbro or Zama. I personally haven't seen the A circle mixture adjustment screws here yet. Of course I haven't seen the octagon Stihl mixture screws either but I already added that tool to my collection.

The EPA requires these crazy adjustment screws and think every machine is prefect out of the factory which they are not. I have seen replacement so out adjustment that they will barely work as a will start setting.

The A circle are fairly common on MTD Yard Machine, Yard Man and Remington trimmers. Seems like when I got my A tool it was still a OEM tool only and $38 then MTD was forced to stop selling the adjustment tools to dealers under pressure from the EPA because we were not equipped to do emissions testing after adjustment.

 

[StarTech]

The A circle are fairly common on MTD Yard Machine, Yard Man and Remington trimmers. Seems like when I got my A tool it was still a OEM tool only and $38 then MTD was forced to stop selling the adjustment tools to dealers under pressure from the EPA because we were not equipped to do emissions testing after adjustment.

I haven't just not seen them yet then. The Remington trimmers here has the 21 spline adjusters. The customer burned both them with few hours per the customer out of the box because they were so out of adjustment. But the pistons looks like they ran a lot longer. Anyway both are trash now.