I ran pre-mixed 40:1 fuel through the trimmer brand new out of the box. Ran well the first tank. Now it will not run when in the "run" position. It runs half way well on half choke but doesn't have full power. If i move the choke leaver and hold it in between half choke and run it spools up and has more power but won't stay there unassisted....???
Sounds like the fuel filter is particularly plugged. Maybe you had a little trash in your gas, or a bit of it was in the tank from manufacturing. Hopefully changing or blowing out the filter will help. That's the first thing I'd check.
SOURCE: After rebuild only runs on half choke.Adjusting screw doesn't help
The rebuild you did is correct, but did you clean the small ports in the carb.? I use a Den Tek Brush (used for cleaning teeth). They work great for this job. You may also want to check the small screen in the carb. The smallest of particles can cause this problem.
Jim
SOURCE: My Poulan featherlite weed eater will not run on no choke
yes you could have
anytime you have to run half choke or choke to get to run you have a lean condition and not enough fuel.
you could also have a stuck ring on the piston which is very common and this requires dismantleing engine to access,also scuffed piston and etched cylinder wall.
if you have a compression guage you can screw into the spark plug hole and hold throttle open and pull the rope 5 0r 6 times like your trying to start it your final reading should be 70 psi or above if its below 70psi you may have the above mentioned
also check the tightness of the 2 head bolts allen type or torx type sometime they loosen and the gasket between the cylinder head and crankcase blows out
just some things to check hope this helps some
SOURCE: trimmer only works on full choke
Check the fuel lines for cracks/breaks. If they are o.k., then:
You
will need to disassemble the carburetor and spray
with carb.cleaner. Make sure the small screen is free of debris.
(Should be able to see daylight through it.) Use a Den Tek Brush, (http://www.drugstore.com/products/prod.asp?pid=165357&catid=1152),
to clean the small portals in carb. These portals can
become blocked. Reassemble and start.
If you need further assistance, just let me know.
Jim
SOURCE: i have a poulan pro trimmer, it wont stay running
First of all, YES. boggs is a word in my dictionary. Remove the muffler and carefully take it apart. Pay close attention as to how it comes apart because it is vary important it goes back the same way. you will probable find that it is clogged. If it is then remove the debree. If it isn't then you will have to adjust the fuel mixture screw. First start the trimmer, then let it run for a few minutes to warm up, then gently turn the screw a little bit at a time counter clockwise first, squeezing the throttle inbetween adjustments . If it starts to take off then fine tune it untile your happy. If it boggs worse then turn it clockwise.
But first check the muffler.
Good luck
SOURCE: My Poulan Pro weed trimmer SM132 does not run.
The primer does require two lines attached as it is a Walbro style primer. All four SM132 models uses the WT628 Carb. Since the trimmer ran 10 minutes then you have got all the lines connected right. Mostly you got trash in your carb or it simply needs rebuilding as the diaphragm may have pin hole in it or the check valves are worn out. Depending on the age and use of your unit you may also have a sticking piston ring.
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