Baby Stihl

[JBS 181]

 Have a little branch cutter Stihl. I believe it is an ms170. Runs great cutting, but will not idle in normal or cutting position. Horizontal. It will idle when saw is tipped vertical. Nose of bar pointing at ground. Where might I start examining  saw first for idle problem. Saw is around 5 years old. Thanks.

[sawguy21]

Check the fuel line and impulse line for cracks.

[thecfarm]

I am no expert. But I would be concerned about that sucking air and running on the lean side.

[joe_indi]

Though it could be a fuel hose gone stiff, symptoms  are similar when the jet valve in the carb does not seal properly. This causes air to enter the metering chamber thus leaning out the fuel

[Pulphook]

All the above , and : fuel filter, fuel tank vent ( in the saw ), change and/or regap & clean plug.
Since I'm dumb. look for simple fixes.
My 170 is the "emergency" saw when the others don't work or are stuck. Stihl made it for "the girls" :D : light, easy to run and start.
Thanks to the brain who suggested using canola oil for the bar in the cold.....my boss however didn't like it. :-[

[Air Lad]

They also have a plastic band to help hold the boot to cylinder head,
a hose clamp would do better. Also the spark arrestors get clogged and give bogging issues. A mate gave me one he had melted piston. I fixed it up and it's one handy little saw.
Good luck with it