Posted by jturbo10 on June 26, 2016 at 19:51:24 from (71.51.59.136):
In Reply to: OT:Stihl MS 170 saw posted by Phil9N3667 on June 26, 2016 at 14:33:59:
Had the same problem with a new Echo commercial hedge trimmer. Was only used twice and less than 5 hours. Took it back to dealer and said it wasn't under warranty as it doesn't apply to carbs and the only solution was to buy a new carb. Did some research and it is a known problem with the new epa rules on emmissions. The cause is a the passage ways are extremely small and any debris, sludge, or ethanol gup will clog the "needle". At the top of the carb under the primer bulb is a "secret passage port" with a small plastic plug. Under the plug is locking plug that has to come out to get to the needle orifice. I used a sharp pick to remove the plastic plug, a drill bit to remove the plug and small flat head screw drive to get the needle out. I cleaned out the needle passage with a small wire I got off a drill wire brush. Do not drill very deep on the blocking plug or you could damage the needle. After cleaning out the needle, and reassembling, it worked great. I ordered a new carb for $20 off internet to have as a spare. Go to YouTube and there are several videos that show the procedure. You can thank the EPA and ethanol lobby for this common problem. I have started using the non-ethanol fuel mix you can buy in a can which does not have any ethanol for all my two cycle engines. More expensive but a lot less problems, especially on chain saws and anything that has fuel lines or carb seals and orifices.
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