Missing high low adjustment screws - replace carb?

[waylonJ]

Hello, I am working on a Homelite leaf blower I got for cheap. I have identified that either the high or low carb adjustment screws is missing and it's causing it bog down when gas is given.

I looked around a bit and cant' find just the replacement screws. I really don't have any junk carbs to pull one from either. Have you guys seen small engine shops sell the adjustment screws? Also, I would assume the high and low screws are interchangeable, right?

 

[StarTech]

First even they are the same thread they not the same most time. Now you know why you got it cheap...Needs a replacement carburetor expecially if it has a Ruixing carb.

 

[waylonJ]

First even they are the same thread they not the same most time. Now you know why you got it cheap...Needs a replacement carburetor expecially if it has a Ruixing carb.

Thanks for the quick reply! I don't fully follow your first sentence.

 

[bertsmobile1]

No they are different.
The Low needle is longer and has a different taper.

Adjustable needles are now illegal so you will not find one for sale
Since tier 3 came in most new products are fitted with rotary valve carbs so have no H & L needle .

 

[bertsmobile1]

If you want help, then we need to know exactly which blower you have .
There are around 22,000 ( got that number off the web ) different cube carbs for engines under 100cc capacity.
I carry around 40 and still have to buy in a new carb around 1 in 7 times that I have to replace one.
The wholesale supplier has a $ 50 in order hence the large stock of complete carbs.
After that I keep around 100 different rebuild kits
Not uncommon for a product to be fitted with different carb every season

 

[waylonJ]

Okay, sounds like I just need a new carb. Thanks guys!

 

[1saxman]

I have thrown away a power head in great condition because of that damned little square carb. I recently thought I was going to have to do it again but my Ryobi came back to life after acting like it was fuel-starved. At $99 for a new one that I'll get 5 - 10 years out of, I won't spend that much or more to fix an old one with old clutch and other parts. I use synthetic oil, premium gas and Startron in it. I never have any trouble with any of my other OPE, just the trimmers.

 

[StarTech]

That's your choice but most cubes are repairable.

 

[1saxman]

I concluded it costs me $12-$15 a year to keep buying new ones when the old one craps out. I did discard the above Ryobi and picked up the new model which has a lot of improvements - like, it starts and idles! I gave the other one to my son who had no trimmer on a large, mostly-wooded lot. I said, 'Well now you have half a trimmer depending on if you can start it or not.' LOL

 

[StarTech]

No they are different.
The Low needle is longer and has a different taper.

Adjustable needles are now illegal so you will not find one for sale
Since tier 3 came in most new products are fitted with rotary valve carbs so have no H & L needle .

Even the rotary carbs usually have an idle mixture screw or at most that I have worked on does but I have ran across a couple that were permamently sealed with a ball bearing.