I have a four-year-old Stihl SH 85C blower that has developed a problem the last three times I have used it. After running at full power for about 10 minutes, the engine speed slowly decreases until it barely runs. If I shut it down and let it cool off for about 5-10 minutes, it starts right up and will run fine for another 10 minutes or so until the problem repeats.
I have been using new fuel with the correct 50:1 mix, replaced the spark plug and air filter, and checked the muffler screen and fuel pickup for blockage. Everything seems normal, so I am wondering what could be causing this. Like I said, it runs perfectly for about 10 minutes and then starts to die for no apparent reason.
Thank you.
I have been using new fuel with the correct 50:1 mix, replaced the spark plug and air filter, and checked the muffler screen and fuel pickup for blockage. Everything seems normal, so I am wondering what could be causing this. Like I said, it runs perfectly for about 10 minutes and then starts to die for no apparent reason.
Thank you.
