Echo trimmer won't start, gasoline flows out of exhaust

Echo 1500 hedge trimmer
Kathy, Gas mixture 50:1, with mid or premium gas.
Check the attached links,manual,instruction and guides, Good luck
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http://www.echo-usa.com/getattachment/f9348047-25e4-468f-b298-f5927ec23249 2 Cycle Oil Mix Chart
Small Engine Repair How to Calculate or Mix 2 Stroke Oil with Gasoline or...

If you have been running Ethanol (regular gasoline) in the gas+oil mix, your problem sounds pretty common. I suspect your trimmer is a year old or more and probably not heavily used. I had the same problem after a year. Took it to a professional and they told me the carburetor was shot. Home Depot sells the Echo and they do not repair the machine. What happens is the ethanol in the gas attracts moisture, which shortens the life of these 2 cycle engines. New carburetor, $139.00 +labor. New decent trimmer, $139.00.

For all others with String trimmers, blowers and other 2 stroke style engines...
If no power on high, tends to bog, won't run once choke off, check these:

• Fuel Filter - It's IN the Gas tank; Just replace it
• Spark Arrestor at Muffler, it's a screen that tends to clog up and causes very restricted exhaust flow
• Spark Plug - again just replace it
• Carburetor, clean or install rebuild kit
• And adjust sorta hidden High/Low carburetor adjustment screws

Take a look here...

And here:

And one more...

Make sure the carb is adjusted properly. And make sure that ater the engine starts, that the choke is in the RUN position.

when it first dies check for spark or even better get a inline spark tester

It could be an air/petrol mix that is wrong that would explain why it works with exhaust off

Hello. Do this. Go to the auto parts store or even a walmart and purchase a can of starting fluid. Spray some starter fluid into the air intake and start it up. Then keep giving it short blasts of starter fluid for a couple of minutes until it takes off on the gasoline. Joe

several months ago I worked on a friends blower same thing you did and still could not get the right rps pulling my hair out i started to take it apart again this time when I started it i noticed some fuel popping back out of the carb and just for the heck of it i turned it over a checked out the exhaust bam there it was the exhaust port was clogged with carbon i took a small screwdriver cleaned out that exhaust port and it was like new hope this is your problem to

A 50:1 ratio with 89 Octane fuel can be used in all ECHO 2-stroke equipment, provided the oil is ISO-L-EGD and JASO M345 FC/FD certified. ISO-L-EGD and JASO M345 FC/FD oil must be used with a mid-grade (89 octane) or premium gasoline in all 1997 and newer engines.
A 50:1 Ratio = 1 US Gal. 89 Octane + 2.6 fl. oz. ECHO POWER BLEND OIL
Echo Power Blend Universal 2-Stroke Oil can be used in all of our 2-cycle air-cooled equipment ever made. You may also use this oil in any other brand of 2-cycle air cooled equipment, but it should always be mixed at the 50:1 ratio whether or not it was a 32:1 or 16:1 etc. machine. This oil is the highest quality 2-cycle oil on the market today. There is no need to have more than 1 tank of fuel for your 2-cycle equipment any more.
Use only fresh gasoline with a minimum octane rating of 89 through 93 (mid-grade to premium) at all times. The gasoline suppliers blend mid-grade and premium gasoline with greater amounts of detergents and anti-oxidizing additives to keep the engines clean. Lack of these detergents and additives in a 2-stroke engine will cause a heavy build-up of varnish and gum deposits on the piston surface and ring grooves. Regular unleaded 87 octane or lower gasoline may not contain enough of the detergent additives that are needed in a 2-stroke engine to keep varnish, gum, and tar deposits from forming. Use of 87 octane fuel may shorten the life of the engine.

ALL TWO-STROKE OILS ARE NOT EQUAL!
ECHO POWER BLEND OIL, is manufactured exclusively for ECHO, Inc. and meets the (ISO) International Standards Organizations highest performance rating of ISO-L-EGD for Air Cooled 2 Stroke oils and is JASO M345 FC/FD REGISTERED. Years of research and testing have resulted in an oil that is fully compatible with fuels containing 10% ethanol and can be used in all air - cooled, outdoor power equipment 2-Stroke engines at 50:1 ratio. ISO-L-EGD and JASO M345 FC/FD rated oils must be used with a mid-grade (89 octane) or premium gasoline in all 1997 and newer engines. Always look for the JASO M345 FC/FD square logo and registration number to ensure you are using the highest quality 2-stroke oil for your ECHO product.
ECHO POWER BLEND OIL is made for high revving, (7,000 RPM and up) air-cooled 2-stroke engines that are E.P.A. and C.A.R.B. emissions certified. Make sure the oil has a EGD and FC/FD certification. Oils that meet ISO, EGA/EGB/EGC and JASO FA and FB are of lesser quality, designed for applications such as water-cooled boat engines, low RPM lawnmower engines, or snowmobile engines and should not be used in ECHO Engines. Prior to 1997, oils were not manufactured to these higher standards. Some or most of the oils were simply 30 or 40 weight 4-stroke engine oil with minimum amounts of additives. ECHO POWER BLEND OIL is the highest quality 2-Stroke oil available and will provide maximum protection against engine wear and carbon buildup.