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I am looking for the very small d tool used to adjust the idle mixture needle that is at the center of the barrel on many zama carbs used on echo equiment (and others). I managed to find one on amazon but it is still slightly too large.

Did you try a jeweler's screwdriver? It's in a set at walmart\northern tools\grocery store\etc for a few bucks.

The pn for the Echo tool is 91159L. They are not cheap however.

artemjemmy said:

I am looking for the very small d tool used to adjust the idle mixture needle that is at the center of the barrel on many zama carbs used on echo equiment (and others). I managed to find one on amazon but it is still slightly too large.

Click to expand...

also what is too large? Outside diameter or is it the D socket itself?

artemjemmy said:

I am looking for the very small d tool used to adjust the idle mixture needle that is at the center of the barrel on many zama carbs used on echo equiment (and others). I managed to find one on amazon but it is still slightly too large.

Click to expand...

There is a big D a small D & a double D
In some places it is illegal to sell the tools retail
OTOH the overseas vendors bypass local laws and it is cheaper to buy the 6,8,10,12,14 tool set than to get a single one .
So Alibaba and search "carburettor tool kit "
You will get 50 pages to wade through
while most will have a minimum buy ( because it is supposed to be a B2B platform , not a retail one ( hence bypassing retail sales laws ) nearly every vendor will do a 1 to 5 ltem "sample sale" at a higher price but still about 1/2 to 1/3 to buying local even if you can buy local .

I have bought two different sets from amazon, and cover the majority of screw types on carbs. The more pieces, the better.

StarTech said:

The pn for the Echo tool is 91159L. They are not cheap however.


also what is too large? Outside diameter or is it the D socket itself?

Click to expand...

D socket itself, here is the link I used: https://www.amazon.com/XLYZE-Single-Screwdriver-Walbro-Common/dp/B07B6MQVQB. Now that I look, it seems there are several "micro single D" adjusting tools but they all have poor reviews.

You can buy a 10 tool set on ebay for around $16 w free shipping. (search 'carburetor tools') I bought one of these sets and they've worked fine for me....

fwiw!

Yes most of the after market 2 cycle tools are poorly made. It took getting three kit to one that fit fairly well. Yet I put my oem tools in place of the Chinese ones where I had them.

But at least the last set had the A circle tools.

The micro D tool in my set didn't work well. I took a piece of thin wall brass tubing and tapped it onto the adjusting screw and it works fine.

this is the set i got, currently unavailable 21 Teeth Splined + 7 Teeth Splined + Single D + Small Head Single D + Double D + Pac Man + Small Head Pac Man + Hexagon.
So far haven't had any issues with fitting.

Hammermechanicman said:

The micro D tool in my set didn't work well. I took a piece of thin wall brass tubing and tapped it onto the adjusting screw and it works fine.

Click to expand...

Good idea, the only problem is idk what size tubing would work.

artemjemmy said:

Good idea, the only problem is idk what size tubing would work.

Click to expand...

Some stuff i had laying around. I think it was 1/8" id.