High needle adjustment

[123Michael]

Hi,

I have an 011 that seemed to run pretty well. Until the other day it kept bogging down. I leaned out the high jet, seemed to fix it, but started doing the same thing moments later. i ended up screwing the high jet in all the way and it still ran, but bogged down when cutting.

Airfilter is clean, saw is well maintained etc. Could it be an incorrectly adjusted needle leaver? I do remember fiddling with this once, probably adjusted it out, in line with the theory below.

On the subject of needle leaver adjustment, is it possible that by adjusting it up a little, old saws will start easier? As i understand, lack of compression and failing crank seals will effect the operation of the diaphram on the carb, causing it to not move as much as it did when new. would minor adjustments to the needle leaver correct this?

Any ideas. I will pull the back off the carb this weekend and set the leaver down a bit and see what happens.

 

[sedanman]

Check the stiffness of the diapragms, I had an older 011 that was a bear to start and kept needing high speed adjustment, a new carb kit solved all of its problems, then I sold it on e-bay!

 

[123Michael]

Well the carb gaskets are original so i imagine that they wouldnt be in peak condition. It starts great, but has only recently acquired this high end bog down.