My Stihl MS 290 won't run below half of a tank of fuel....runs great on full tank and just developed this problem

Stuart

• 99 Answers
• Posted on Oct 26, 2008

SOURCE: cant find serial number on stihl chain saw ms 290

If the silver rating label is still on the safety brake lever, it should be on there. If not, look at teh housing to the left of the exhaust by the 'teeth' on the body, or on the housing below the exhaust. It is normally stamped into the plastic.

SOURCE: ms 290 acts like not getting enough fuel

hi

check the screen filter from the carb,check the assembly needle-spring -lever,check the fuel filter ,check all the membrans and gaskets from the carb,check the sparkplug pipe if it is fit snugly on the plug.

regards savumihai71

SOURCE: Stihl MS 260 Pro wont run wide open or idle.

Hi brandon First change the sparkplug with the same heat range,Check and clean the gas filter with compressed air.Remove the carb and very carefully disassembly entirely.Check the gaskets and the diafragms.At the fuel pump side there is a fine screen(clean it).Check the needle,the spring and lever.Unlock the screws L and H(note how many turns are they).Put the corp of the carb in a special clean solution for 12 hours and then clean it with compressed air(something is clogged there).Put all back together and try to start the engine. regards savumihai71

SOURCE: My Stihl MS-180be chainsaw is leaking a small amount of gas

This saw has a fuel tank vent that could be leaking a small amount of fuel, or the fuel line coming out of the tank could be leaking. Fuel line replacement isn't complicated, you could try installing a new one. If it's the vent, odds are it's not enough to cause alarm........unless the vent line is cracked. In that event, you should replace the vent hose. Again, not a complicated repair.

SOURCE: stalling chainsaw stihl ms310

One more thing to try hold her on her side and loosten the fuel cap a little. A plugged vent may also cause your problem. HTH
Lou