How To Repair an Echo CS-310 Chainsaw That Runs Bad

This video shows how to repair an Echo CS-310 chainsaw that was not purchased from a dealer. Having not come from a dealer, the saw was never fueled, oiled, test ran, and re-tuned if needed, prior to the purchaser taking possession.

The saw started easily and would idle, but it bogged when given throttle, wouldn't reach full rpm, had a constant, rough running misfire, and of course, no power.

NOTE:
I made an error in the original video, in the pop-up banners at the end of the video, and thankfully a viewer: @michellatour150 messaged me and pointed out my error(Thank you!). I wasn't able to fix that using YouTube's editor, so I had to remake the video and post it a second time. I've deleted the original.

On 2-stroke engines, turning carburetor mixture screws counter-clockwise ADDS FUEL/RICHENS THE MIXTURE. Turning carburetor mixture screws clockwise DECREASES FUEL/LEANS OUT THE MIXTURE.