Stihl bg86c blower. Quit running after abt twenty mins of good strong blowing. Didn't sputter or anything, just dead quit. Not getting fuel to cylinder. Checked filter,gas lines, took apart cleaned and put carburetor back on. Still no gas to top of cylinder? Also what is gap on spark plug supposed to be? Recommended plug? Also gap between coil and flywheel? This things makin me feel completely stupid? HELP is greatly appreciated!

It is a fuel / air problem. Do you have a primer bulb, did you replace it and put it in the right way around arrow to the carb? It is a known issue. There are lots of help online and there are some videos below..

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eReplacementParts.com https://www.ereplacementparts.com > lawn-equipment
If your blower runs for a while then dies, you'll need to check the fuel filters, spark plugs, and more. Our troubleshooting and repair guide can help.

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the tool you got with the unit for changing other parts
usually is a T shape and has two hex socket at the top of the T and the stem has a torx 10 or similar on it

is also used to change the spark plug

Sounds like a tricky one. Have you checked the magetism/functioning of the flywheel.? Tracking back the problem by having a new spark plug and coil would next point you to the flywheel. Coil to flywheel gap should be 0.25 feeler guage.

Hope this proves useful. :)

Maybe a problem with the 'connector' (item 4) as its the only way for fuel to pass in and out the fuel tank. Obviously assuming none of the pipes are leaking. Also check the fuel tank vent (item 2), these have valves in and can often perrish and leak to atmosphire.

Hi roberthoh288
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Check fuel is getting into the cylinder, check you have good compression, check you have a good strong continuous spark. Once you have checked all these, please provide more information. Thank you

If there is a spark arrester in the muffler outlet check this is not blocked with carbon.

take off the muffler and run it the screen inside it might be plugged and you can clean it off by opening the muffler

You will have to check for fuel and spark to the engine. By process of evaluation, you may come to the reason for this failure. Engines need 4 things to operate properly;
1. Good compression (engine not worn out or scored)
2. Good strong spark
3. Clean, fresh fuel mixed right and introduced to the engine correctly.
4. Clean air supply
These things may sound elementary and they are but these machines are very temperamental and if one of the 4 above things is off....performance will suffer or you will get the dreaded no-start condition.

running the right fuel mixture for the unit if not it could have to much oil & fouling out the plug or not enough oil & getting to hot & melting the piston ring & piston the only other thing is the carb adustments