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Runs then shuts down even after full choke. tried

Runs then shuts down even after full choke. tried with every choke setting and the same problem crops up. I have cleaned carb, replaced fuel lines re-mixed fresh fuel and installed a new electronic spark module. the plug seemed wet when i shut it off so it seems to be getting fuel. Product is Poulan pro trimmer/edger/blower, m/n ppb100
31cc.

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SOURCE: Ryobi 725 R runs only when choked, full throtle

you will have to rebuild carb.red and yellow caps just pull off you might have to get a tool to ajust carb and take them out

Posted on Jul 18, 2009

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1 Answer

Homelite gas edger cuts off after running about 10-15 seconds


The fact that is runs slightly longer on full choke may point still to a fuelling issue.. Does it actually Rev in those 10 seconds or does it just want to bog down and stall.?

May 18, 2016 | Homelite Lawn Trimmers & Edgers

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Need to know what carb screw adjustment need to be set at weedeater starts for about 4-7 sec then shuts down put new hoses on checked gas filter and cap checked out ok. i pump the ball about 10 times...


If there is a choke adjustment you should set that at full until the trimmer warms up, don't touch the gas. Then repull start at half choke, don't touch the gas either at this time. Then start at no choke, and then set your idle on the carberator with the adjustment screw. Also don't push the primer bulb so many time you will cause the spark plug to get flooded and drown out the spark, which is exactly what is happening.

Sep 06, 2010 | Homelite Mighty Lite Lawn Trimmer

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Wont start what is spark plug gap whatelse bulb full,new,gas in it,lines hooked


These are bad about flooding with the least amount of trying to. I usually can get mine started by letting it sit for 5-10 min. push the bulb 3-4 times hold the trigger and push the choke on full with 3/4 speed set. Pull 1x. Don't worry usually it won't start on this setting, it really just helps get the choke and carb set. Put choke back 1/2 way and try to start, if so, gas the trigger a couple of times but not holding in down. If it don't start put the choke on full again and try to start without holding the trigger. It should start after this. Take the plug out replace the coil wire onto plug and pull the cord gently to see if you're getting spark at the plug. Holding the coil boot to prevent it giving a small jolt.

Jul 27, 2010 | Homelite Mighty Lite Lawn Trimmer

1 Answer

My homelite string trimmmer will not run when choke is run position. it will run, but not at full throtle, when choke is set between full choke and half-choke.


you've got a fuel system issue , most likely carb problem, if this a newer trimmer it will likely need the carburetor replaced or adjusted, also check for cracking fuel lines or signs of old fuel varnish in the tank

May 31, 2010 | Homelite Mighty Lite Lawn Trimmer

1 Answer

Trimmer will only run in choke position


You have a few possibilities. Make sure you have good fresh gas in the tank. You're not getting enough gas, so choking helps get more gas than air, making it run better. Could be the carb diaphram (not very expensive if you replace yourself), when they get old they don't perform like they should. Could be the filter in the gas tank is bad, plugged. Also might be just an easy adjustment on the carb Low, and High speed screws. The choke has three positions, full choke, partial choke, and no choke, which means run position.

Apr 28, 2010 | Homelite Consumer Products 4.0 Amp, 13 In....

1 Answer

It won't run prorerly


I had the same problem. I took it to the dumpster and used my old echo that I purchased in 1986. The Homelite was 2 years old. My sugesstion is to dump it.

Apr 06, 2010 | Homelite Mighty Lite Lawn Trimmer

1 Answer

Only runs on full throttle


Are you saying full throttle, or full choke? if full throttle, you should be able to set the idle up. the idle screw will be the one when you give it gas, it will be the screw on you'r throttle linkage. If full choke, maybe the spark arrestor is plugged. You can remove it by removing the muffler.It would be between the muffler and cylinder head. You don't need this to run.I hope any thing I posted will help.

Jun 19, 2009 | Poulan 25cc 2-Cycle Gas Powered String...

2 Answers

I have an echo mfg'd Echo GT2000 string trimmer with bent shaft. Gas not getting to spark plug. Could it be a bad Carb?


could be but lets try some other things first
On the carb. you have a primer bulb have you pushed that several times and is there gas in the bulb itself?
Are all of your fuel lines intact and not broken or brittle including the primer bulb?
Are you using fresh fuel mixture?
Be sure your stop and run switch is in the run position.
find your air filter and remove the filter itself
then you will be looking at the inlet side of the carb.opening and a orange choke shutter
Take a thimbles full of mixed fuel and pour directly into the carb opening with the choke off( turn trimmer on its side to do this)
now with everything (except for the filter) set to run try to start your trimmer 4 or 5 pulls
does it try to run? runs and shuts off? if so then you have carb. issues
which you can either replace or rebuild
sometimes if you do not want to tackle it yourself then it is less time consuming to replace it
but not cheaper.

hope this helps you some

Jun 13, 2009 | Echo Lawn Trimmers & Edgers

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