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I bought this washer at an auction and my wife used it once, I got it out today to wash the house and it will crank and run, but rough. I took the cover off from the front of the carb to do some adjusting, there are no screws! I thought I had one but looking closer all it does is adjust the gubner. Under the bowl there is just a bolt to hold the bowl on, no adjuster screw. I see none on the top of the carb. Do these things have no adjustment at all anymore?

This thing is constantly up and down, the sprayer works but every so often it quits spraying like the motor aint turning it hard enough to build pressure.
 

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Some new carbs don't appear to have adjustments.
I would hope they're just hidden to keep the unwashed masses from working on them.
 

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New carbs on anything larger than a string trimmer size have not had mixture adjusters for almost 20 years now.
Some riders have a low speed minimum screw and a low speed mixture but it does nothing for running the way you use it as full operating speed.

They are all fixed orifice or fixed jet ones.

Most briggs ones and even the newest tecumsehs have the jet drilled into the bowl nut.
One cross drilled hole at the bottom and one through the jet down the middle . You have to run soft wire like copper or cheap spring through it to clean it out and blow with air and carb spray.
The tecumseh has one extra really small one on the top around the edge that goes in toward the middle one.

The newer ones and imports are like a Honda.
The bowl screw is just a bolt to hold it on.
THe jet is 95+ % of time up inside the aluminum tube coming down from carb body.
use your cellphone camera on selfie or a mirror to see it.
It has a slot in it for a flat screwdriver.
You unscrew it to remove it and then tap the side and it should fall out and there is the emulsion tube/metering tube above it that sticks just it tip into the carb through you can see...and it will fall out too. The thin longer part goes up.
These tubes rarely get clogged but I clean them anyway.
The removeable jet is what gets clogged. When one won't start you can't even see light through it.
Now there is another jet of two main styles in these and the tecumseh carbs but it doesn't cause near the probs the main one does.
If you have a honda or a clone import one that runs nice and fast but surges up and down quickly..it needs the other one cleaned out.
Harder to get to and do on all but the tecumseh and you have to have very tiny wire to run through it.
 
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