New to forum. I have had my mm55 for probably 5 years. Great machine. But just like my Stihl chainsaw, it seems that they are very sensitive to fuel issues. The mm55 ran great for the first year. Was a little tempermental the second year. Then in order to get work done we had to run it with the choke partially on. Now it doesn't run well even with that.
Yesterday I pulled the carb off, dissassembled and cleaned everywhere I could. I removed and inspected the fuel line, and didn't see any cracks or holes. I do notice that the primer doesn't come back up well now, but it seems primed. I think it actually runs worse now than it did before all of this. The gasket going to the air cleaner assembly tore slightly during disassembly. I wasn't able to get the high speed needle out to clean behind it because of the limiter, and didn't want to break it.
My saw is already in repair shop prison for repair for a week now. I need to get to the point where I can do these repairs, since the Stihl always seems to need it. Not bashing it, but they do seem fussy. I have no access to fuel without ethanol around here anymore. I am running fresh 87 octane with Stihl mix.
Any help is sure appreciated. I could use the help!:confused2:
Oh, I did remove the spark arrestor and inspect. It was by no means clogged, nor did it have all that much carbon. So I reinstalled.
Yesterday I pulled the carb off, dissassembled and cleaned everywhere I could. I removed and inspected the fuel line, and didn't see any cracks or holes. I do notice that the primer doesn't come back up well now, but it seems primed. I think it actually runs worse now than it did before all of this. The gasket going to the air cleaner assembly tore slightly during disassembly. I wasn't able to get the high speed needle out to clean behind it because of the limiter, and didn't want to break it.
My saw is already in repair shop prison for repair for a week now. I need to get to the point where I can do these repairs, since the Stihl always seems to need it. Not bashing it, but they do seem fussy. I have no access to fuel without ethanol around here anymore. I am running fresh 87 octane with Stihl mix.
Any help is sure appreciated. I could use the help!:confused2:
Oh, I did remove the spark arrestor and inspect. It was by no means clogged, nor did it have all that much carbon. So I reinstalled.
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