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2019/09/17 16:25:27
Reinman

Echo ES-210 Blower Bogging

Have an Echo 210 blower that runs fine at idle (and for a long time), but as soon as throttle is applied, bogs and quits.

I’m just getting into small engine repair, have done a lot of reading - no experience, but this one has me stumped so far. Not good for my first project.

Here is what I’ve done:

- Did tune up - replaced spark plug, fuel lines, and new carb (C1U-K78) Single fuel setting - 2 turns out from closed.
- Checked tank pressure - still does with cap off tank. Also took fuel filter off and does better with it off. Not the filter since it’s brand new and I’ve tried multiple ones.
- Compression pressure is at 90psi after 5 pulls. No leaks - pressure maintains after 5min. I’ve done a lot of reading on what a good pressure is and it almost seems to be a religious argument ;-).
- Checked exhaust - screen looks good, no blocks.
- Gaskets around manifold and carb all look good.

This machine is just not getting enough fuel at WOT. Any ideas would be appreciated.

Rein
2 comments Leave a comment
AVB
Well from my experience if your compression reading is done with the throttle held wide open it is too low. Personally I use 100 psi as a minimum for any 2 cycle engine. I seldom ever get a engine to run properly below this psi.
 
Second reset your mixture screw to an initial setting of 1-1/2 turns. On this carburetor this adjustment screw is the main [high speed] mixture setting screw. Since it idles well I am thinking either the main mixture setting is wrong or the metering lever may be set too low causing lean out or set too high causing an overrich condition; of course, it will need fine tuning. New carburetors are not always set properly from the factory. Either one will cause bogging at wide open.
2019/09/17 17:10:50
Reinman
Thank you so much for the reply. I tried the pressure test with WOT (I didn’t know there was a difference) and it was 110psi. Throttle closed was 90psi. I put in new ethanol free gas and set the mixture screw to 1-1/2 and it started right up and worked great. I didn’t know it was than sensitive 1-1/2 to 2 turns. You’re my first post and reply. Love this forum.
2019/09/17 18:20:18

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