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Sthil 028AV Chainsaw
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Posted by Bob (WA) '48 8N on September 14, 2003 at 13:10:36 from (188.8.131.52):
I bought a Sthil 028AV cahinsaw about a zillion years ago. I have used it off and on since new, the longest average period of inactivity being 6 or 7 months. About the middle of april this year I dug it out to do some work. I topped up the fuel and bar oil. Like always it fired on the 2nd or 3rd pull. I warmed it up a moment or two and began to cut. The saw did the job perfectly until running out of fuel.
I refilled it and went back to work. About halfway through the second tank it just seemed to run out of power and eventually died. I checked the fuel level, it was ok. Even though I had cleaned the air filter earlier I checked it, still clean.
I went ahead and started it back up and it started and ran normally. I revved it up and went back to cutting and as soon as I applied a load to it it lost power and then died again.
I cleaned the fuel filter (what a pain to get out) & checked the tank vent. I tried adjusting the high speed needle and it didn't help. I have even drained the fuel and replaced with fresh fuel. The saw will start and idle just fine, it just won't pull a load.
So I am guessing that there must be a fuel pump of sorts on this saw and it is failing. Am I right? If so does anyone have a parts diagram or scan from a service manual showing the details?
Thanks in advance for the help.
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