Adjusting high speed
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Find the adjustment screws on the front of the carburetor
There should be two screws on the front of the carburetor, which are used to adjust the air and fuel mixture. These often look like flat-head screws, and you can use a screwdriver to turn them, adjusting the amount of fuel and air mixing in the carb.
Turn the high speed or main jet screw clockwise until the engine begins to slow. Then, turn the screw the other way until the engine begins to slow. Turn the screw back to the midpoint. Once adjusted, check engine acceleration by moving the throttle from idle to fast.
You can do so by adjusting the idle mixture screws to 1.5-2 turns out, and the idle speed screw to 1-1.5 turns in. Warm the Engine Up. The engine`s running temperature directly correlates with proper air and fuel mixtures. So, be sure to let the engine run and reach normal operating temperatures before proceeding.
They are typically labeled L (low speed jet), H (high speed jet), and I (idler jet). Your saw may be labeled differently (in the photos in the Gallery below, the idler jet is labeled “S”), but you`ll have three screws that correspond to these descriptions.
The carburetor`s main function is to mix the fuel with air in a perfect ratio. It does so according to the engine`s speed and load conditions. Theoretically, the ideal mixture contains 15 parts of air and 1 part of gasoline fuel. Thus, it provides the air-fuel ratio of 15:1.
Fuel screw turned in (clockwise) gives a lean mixture and turned out (anti-clockwise) gives a rich mixture. Air screw turned in gives a rich mixture and turned out (anti-clockwise) gives a lean mixture. Lean means more air, less fuel. Rich means more fuel, less air.
Discover Relevant Questions and Answers for Your Specific Issue
the most relevant questions and answers related to your specific issue
Need Help Installing U-Turn Trimmer Head on Echo SRM-210
It is ridiculous, there are a bunch of bolts, and then a multi-fit brochure showing a grid of nonsense.There are instructions on the inside of the package, however that is how to string the line.
How do you load the trimmer head… Lost the user manuel
Check out the manual (available under the technical documents section of the Echo webpage, or at http://www.echo-usa.com/documentation.asp?Model=SRM-210&lang=E )and it will tell you how to change it.
Why does the echo start but die when i move from cold start to run?
Fuel issue, carb adjustment, fuel lines, carb rebuild.
What is the gas–oil mix for the echo hc-1500
FOUR PARTS GAS TO 1 PART 2STROKE OIL
Echo manuals hard starting hedge trimmer 1500
All echo manuals are available on line at echo.com for free
I need the lock for the coupler assy. Echo trimmer SRM-210SB
Here is a link to the complete parts list and ordering for your trimmer.
What would cause excess vibration in an Echo double sided hedge trimmer model HC-1500
Check for loose blade to case mounting bolts or cracked support bar.
Got a Echo 266 weed trimmer from my boss that seized up. Straight gas was put into it after only second use. I got it to turn and compression seems good and it sparks but still won’t start. What do i check for next? Thanks…
Sal check by putting a tiny bit of fuel in the block and see if it fires. It may need the carb gaskets changed