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not difficult at all to do , first obtain Ryobi primer /fuel line kit from your local distributor , then remove air cleaner cover (pops off with fingers) then drain all gas from fuel tank back into storage tank , locate the two Phillips head screws next to primer bulb and remove them , careful not to drop them !! remove old bulb from ring and replace with new bulb from pkg. then using a clean cloth , carefully wipe out sealing grove where bulb seats down (I guarantee its dirty) when all clean , place bulb down in grove and make sure it seats well then secure with ring and replace screws (don't over tighten) you might as well replace the fuel lines as they come in kit , instructions are on pkg , I do suggest doing one at a time to not forget how they go , and do use the new fuel filter that's inside pkg too
FIXED- No start Weed Eater with the symptom of the primer bulb collapsed, not filling nor returning to pop out after pressed.
Worked in model WT-3100 with Walbro carburetor WT-583 and has to work in many others. It happened after winter hibernation, even when left with no fuel to prevent formation of fuel deposits.
FIRST, mark/scribe the carburetor fuel outlet that has the hose towards the primer purge bulb as 'OUT' and the fuel inlet coming from the fuel tank 'IN'
The problem was a fine mesh metal screen strainer blocked by contaminants, inserted at place shown as number '3' in figure 7 at
That fine mesh was removed by prying its edges around with a sewing needle held by pliers.
It you cannot see light trough it holding it against a lamp, is blocked even if looks clean.
Removed, discarded, reassembled and started. Later ordered the part or kit but was able to use the machine immediately.
Writing this as am tired of seeing responses like 'may be this' or 'try that' or 'perhaps the other' by guessers.
On your machine, it is easy. Remove the 2 large philips-head screws holding the bulb retaining ring. They are located on top, on either side of the bulb. Pull the ring off. Then, just pull the bulb out, replace it, making sure it is in the groove in the primer base assembly correctly. Then just re-install the retaining ring with the 2 screws. Don't overtighten these screws as they are going into softer metal. That is it!
Pull on the tap head. Straight out. Hard. Here's the Weedeater manual. http://184.108.40.206/manuals/545117522e.pdf
The spool should just pull out, its held in by 2 clips, royate it till it pops up then pull it out, with a wiggling motion,
Grasp firmly and pull straight out....per tech support from 800 number on machine.
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.
You need to clean the carburetor. Remove and disassemble carb. Use a den Tek Brush, (used to clean between teeth), to clean the small portals in carb. Use a carb. cleaner while cleaning. Make sure the small screen in carb. is free of debris. The smallest of paticles can cause the carb. not to run right. Reassemble the carb. and try starting. If there is no change, then you will need to buy a carb. kit for your trimmer. Replace all appropriateparts: gaskets, diaphragm, needle valve, and the small screen.
I had this same problem, would run a couple of seconds, stop, and you couldn't start it again.
Had good gas/oil mix 50:1 and 25cc Homelite. Had replaced the fuel filter, gas, spark plug, and took carb apart and cleaned with carb cleaner and primer bulb worked fine. None of that fixed it. What did? Take the muffler off and see if it will start and run with the muffler off. If it does, chances are the muffler is clogged. Also check the exhaust ports and clean them out if plugged with black oil carbon residue.
My muffler was clogged up, took it off, cleaned out the exhaust ports, there was some oil that was in the muffler(oil that didn't burn during combustion). It now starts and runs like a champ on first or second pull.