Use a hooked/bent piece of wire or similar to get fuel line and filter out of petrol tank filler hole
Remove fuel filter from end of fuel line
Remove air filter housing
Remove choke control/ plate from carburettor
Ease old fuel line from carb. inlet. And clean inlet tube if necessary
Gently but firmly pull old fuel line through hole in base of tank
Fitting new fuel line
the new fuel line has too big a diameter to fit through the hole in the base of the fuel tank.
To get round this I heated the end of the tube with a lit match (but a blow torch or gas ring would do) until it was soft enough to fashion into a point- take great care the plastic obviously gets very hot and could burn ***** flesh. The tapered end you form should be at least 1cm long. Allow to cool
Trim off the end of the tapered point if necessary
My next problem was to get the tapered end through the tiny hole inside the fuel tank. To help with this I took the innards out of a standard biro then put the fuel line through the empty tube with the tapered end projecting from where the ballpoint used to be. Push the tapered end through the hole inside the tank.(a torch was useful here to help see inside the tank)
Pull the fuel line through from below the tank until you have enough to push on to the fuel inlet on the carb.
Cut the tapered end off the tube and push onto the fuel inlet .
Cut the other end of the tube so there is enough length to reach all parts of the fuel tank.
Something could be keeping it from getting the right mix of air and gas. It could be a crack in one of the fuel lines or primer bulb. Maybe the carb needs rebuilt. I made some videos on how to do all that. I got all my parts form Home Depot, except the carb rebuild kit I got from Amazon. Hope this helps.
My experiance with these is that they are a throw away item as people hate working on them. Do yourself a favour and get a husky. My reason for this is reliabilty. I have owned a 524l for 6 months and reliable as ive also owned a 132r for 30 years that did the rings but for 30 years with minimal maintanance i think that speaks for itself. Dont muck around with this cheap chinnese rubbish. It will cost you. Both now and in the long run
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.
not sure what you're trying to accomplish but the idle screw and low speed mixture screw work together. most 2 cycle trimmers idle happy at 3k rpm's... just before clutch engagement
Typically, if any small engine chainsaw, weedeater, lawnmower...... will only run on choke the unit is starving for fuel. There can be many reasons for this. I'll try and list a few reasons and possible solutions.
#1 reason is the fuel is over 30days. If you think your fuel is even close to 30days or older, get rid of it by taking it to a recycling center if possible or some other earth friendly way, and put in brand new fresh gas. The additives the gas manufacturers put in their gas evaporate very quickly. The gas companies expect their product to be used very quickly and in most cases it is. The problem is the small engine industry. Many of us use a tool and then put it up and don't use it again for a couple weeks. This leads to buying 2-5 gallons of gas and then it sitting around and the additives in the fuel evaporating. This is by far the easiest, cheapest, and most common problem to fix. Whether you think the gas is old or not, try it, most cases it will fix you problem. Can't even remotely count how many pieces of equipment i pour the fuel out and put in fresh gas and the unit runs great.
#2 reason is a clogged fuel filter on chainsaws and weedeaters, or anything with a small 2cycle engine. These engines will almost always have a small fuel filter inside the fuel tank attached to the end of the fuel line. This is a pretty easy repair. Take an old wire cloths hanger or other similar piece of metal, cut it about 12 inches long, bend a hook in one end, remove the fuel cap on the fuel tank, and work to fish out the fuel line. It's pretty easy in most cases, sometimes the fuel filter will be a little hard to get out, but with patience and maybe a pair of needle nose pliers you can grab it and pull it out. Got to your local repair shop and purchase a new one and put it back on the end of the fuel line, and if the fuel filter was the problem, your problem will be solved. Just looking at a fuel filter will not tell you whether it is good or not in all cases. Sometimes the white felt fuel filters will be brown in color and if so, then it could be clogged. Its always a cheap and easy fix to try.
#3 reason is a cracked, or broken fuel line, either inside or outside the fuel tank. If a fuel line is cracked and it is letting in air, the carburetor won't be able to supply enough fuel to the engine and this will cause a lean mixture and could be a reason for the problem. This is common on weedeaters and chainsaws. If the crack is on the outside of the tank, usually you will see it leaking or a build up of excess fuel and dirt. If it is on the inside of the tank, you might not be able to visually see the problem until you remove the fuel line for close inspection. The fuel line can be purchased from a local repair shop (take your old hose with you so they can get you the correct size) and is pretty easy to replace in most cases. If the fuel tank has a separate grommet for the fuel line to go through, then but about 12-14 inches of the hose and cut a long point in one end of the fuel line. This will reduce the amount of effort it takes to get the hose through the grommet. Slide the hose as far as possible and then fish the end of the hose out of the gas cap hole with a hook tool (see above cloths hanger idea) and or a pair of needle nose pliers and pull the hose until you have enough to connect to the carb. Cut the long point off that you made earlier so the end of the hose is square again, and put on the new fuel filter, push the fuel filter and hose back in the tank and fill it back up, and you should be good to go if this was the problem.
#4 reason is a clogged fuel cap vent. The fuel caps on many (not all, some small engines have a different type of venting system) small engines for weedeaters and chainsaws will have a duck bill valve, or some other type of vent in the gas cap. If the vent is clogged, cleaning it will fix the problem. Sometimes the vent isn't accessible and the cap needs to be replaced. Just depends on the model.
#5 reason is a clogged, gummed up carburetor. If this is the cause, then you may want to take it to a repair shop. It's not that they are very hard to fix, but there are many passages inside the carb that could be clogged and I can't go over them all here. I youtube searched for a video about cleaning a homelite weedeater and it is pretty good. I didn't make the video.
https://www.youtube.com/watch?v=5Rt0XuBqAuI
#6 reason is an air leak either between the carb and the cylinder, or between the cylinder and the engine block or on super rare occasions the seals on the crankshaft bearings, and possibly if it has a split crank case a leak there. This should be repaired at a local repair shop, imho.
I'm sure others could point out other reasons, but these are the most common reasons I have found for problems and solutions for engines that will only run on full choke.
Good luck!
