Stihl TS-350 2-stroke cement saw not starting. Bought used 5 months ago. Seller demonstrated that it started in one pull and idled great. Then sat in my barn 4 months. Gas tank has small crack in it so most gas leaks out over a day. Added fresh mix a month ago and it started fine. Used it for about 30 minutes. Sometimes stalled when I pulled the throttle. Restarted immediately and I just played with and pulled the throttle slowly. Used it two weeks ago for 15 minutes, same stalling but at least it restarted and I got the job done.
Today I go to use it - started in about 10 pulls. Worked good for about 10 minutes. Then stalled with a very small backfire. Seemed like intake backfire. Now does not start at all. I thought my mix might have been too strong (might be 32:1) so I added some unmixed gas. Still not starting. It currently has no mix and only a tank of regular gas. I thought if it started I would turn it off immediately and put in mixed gas.
Here is what I tried:
Heating and drying spark plug with propane torch. Sometimes the spark plug was wet with fuel other times dry. Tried other spark plugs. There is all kinds of visible spark when pulling rope while watching spark plug.
Took apart carburetor - Tillotson carburetor. Nothing visibly wrong and it was totally clean. Blew everything out anyways. The one diaphragm or whatever it is with the steel part on the back might have been a bit stretched, but could be okay.
Blew fuel line with my breath. It is clear along with the screen on the end of the hose in the tank.
I put a few drops of regular gas in spark plug hole. Pulled rope. Nothing. When I took out the spark plug there was a slight mist of smoke rising from spark plug hole, but not a hint of firing.
What else can I try? There seems like there should be good spark and I put a few drops of fuel in the spark plug hole. Shouldn't it at least fire and run for a few seconds if nothing else?
Did I miss something? What else and how else can I test anything? Thanks everyone.
Today I go to use it - started in about 10 pulls. Worked good for about 10 minutes. Then stalled with a very small backfire. Seemed like intake backfire. Now does not start at all. I thought my mix might have been too strong (might be 32:1) so I added some unmixed gas. Still not starting. It currently has no mix and only a tank of regular gas. I thought if it started I would turn it off immediately and put in mixed gas.
Here is what I tried:
Heating and drying spark plug with propane torch. Sometimes the spark plug was wet with fuel other times dry. Tried other spark plugs. There is all kinds of visible spark when pulling rope while watching spark plug.
Took apart carburetor - Tillotson carburetor. Nothing visibly wrong and it was totally clean. Blew everything out anyways. The one diaphragm or whatever it is with the steel part on the back might have been a bit stretched, but could be okay.
Blew fuel line with my breath. It is clear along with the screen on the end of the hose in the tank.
I put a few drops of regular gas in spark plug hole. Pulled rope. Nothing. When I took out the spark plug there was a slight mist of smoke rising from spark plug hole, but not a hint of firing.
What else can I try? There seems like there should be good spark and I put a few drops of fuel in the spark plug hole. Shouldn't it at least fire and run for a few seconds if nothing else?
Did I miss something? What else and how else can I test anything? Thanks everyone.