Been having trouble with my my FS90R for a couple years now.
It dies at idle, is hard to start and doesn't like to idle down/disengage clutch. I have to crank the idle past clutch engagement so it doesn't die. Sometimes it acts like it is missing and has no power. A tune up kit helped it somewhat a few years ago with dying. The primer bulb is and always has been very, very stiff and always has some air in it. All my other Stihl equipment, the primer pushes easily and lots of times all the air comes out.
A couple weeks ago, I replaced the primer bulb after it broke, and adjusted the valves to spec, adjusted the carb to factory. It fired right up and ran excellent for one or two tanks. I ran it out of fuel yesterday. Put the next tank in and it went back to hell in a handbasket or worse, flooding out instead of running. Double checked the valve cover was tight and spark is extremely strong. Will jump an inch to the motor case.
Takes 20 pulls to get it restarted after shutting off last night, extremely frustrating.
Its possible it got a snoot full of bad fuel, but other equipment seems to run okay on that fuel.
Do these have an inlet screen on the carb?
Do they fall out of adjustment after adjusted?
Time to trade for a Kombi?
It dies at idle, is hard to start and doesn't like to idle down/disengage clutch. I have to crank the idle past clutch engagement so it doesn't die. Sometimes it acts like it is missing and has no power. A tune up kit helped it somewhat a few years ago with dying. The primer bulb is and always has been very, very stiff and always has some air in it. All my other Stihl equipment, the primer pushes easily and lots of times all the air comes out.
A couple weeks ago, I replaced the primer bulb after it broke, and adjusted the valves to spec, adjusted the carb to factory. It fired right up and ran excellent for one or two tanks. I ran it out of fuel yesterday. Put the next tank in and it went back to hell in a handbasket or worse, flooding out instead of running. Double checked the valve cover was tight and spark is extremely strong. Will jump an inch to the motor case.
Takes 20 pulls to get it restarted after shutting off last night, extremely frustrating.
Its possible it got a snoot full of bad fuel, but other equipment seems to run okay on that fuel.
Do these have an inlet screen on the carb?
Do they fall out of adjustment after adjusted?
Time to trade for a Kombi?