I have a Homelite Model: UT109470 chainsaw which does not stay running. I put in a new spark plug and got it started, used it to cut down a few branches, then it started smoking (due to bar oil running low). I shut it down, filled oil, then started it up again. Cut few more branches and the saw died. While I was using it, it would die occasionally, but started back up.
Since then I tried starting it, but it wont stay running. It would start, run for few seconds and die. I started it today, got it running for a while, but when I release the trigger and push it in again, the saw dies immediately. It also does not sound very good while it's running. Any suggestions????
Thanks in advance!
I have a Homelite 33cc which has never run smoothly since it was brand new. Erratic running, sometimes wont idle, and never seems to develop full power. Adjusting the jets achieved no lasting improvement. In frustration I stripped it down right back to the intake port on the cylinder and found the problem. The two screws that hold the the carb mounting plate to the cylinder were a tad too long in manufacture, and even though done up very tight they bottomed out in their holes before applying proper pressure to the sealing gasket, which then developed some "flutter" in the airflow and partially disintegrated, leaving massive air leaks. No way it was EVER going to run properly like that. Check that this isn't the problem area on your particular model before you go crazy trying to tune your carburetor.
Make sure you are using fresh fuel mix (50:1 ratio). Don't use boat motor oil in a saw--only modern synthetics made for saws. Always premix the oil and fuel thoroughly before adding to the saw. Check the fuel filter for plugging and the condition of all fuel lines, plus the primer bulb condition. Check all carburetor fasteners for tightness. Make sure the air filter and muffler are not plugged. If still no help, you may need to service the carburetor. For an excellent article on Walbro carburetors, go to: http://www.drystacked.com Pay particular attention to the placement of the lower diaphragm and the cover gasket--interchanging positions of them cause many headaches. Adjustment of the two jet screws require a special 'D' screwdriver which may necessitate a trip to a servicing dealer for adjustment. Hope this helps!
Empty the fuel tank and look inside. You should see a short length of line dangling near the filler cap. Another, longer length of line is found near the back end and it has the fuel filter on the end of it. This line feeds the carburetor directly. The filter just pushes onto the line which can be brought out using a wire hook to grab it. You will find this easier to deal with if you remove the cap retainer from the cap opening first. If you pull the top cover (three screws I believe), then the air cleaner and carrier plate (two nuts), you can see the upper ends of the lines. The rearmost line goes to the carburetor and the filter-less line goes to the primer bulb. Good luck!
Drain the fuel from the tank, fish the cap retainer out of the tank mouth, and look inside the tank. You will see two lines hanging in the tank--one with the fuel filter on it's end. Fish the filter out of the tank with a hooked wire, then pull the filter off of the line. If you can't draw air through it, either soak it in spray carburetor cleaner, or just replace it. When repaired or replaced, try to pump fuel with the primer bulb--it should start to fill after the third pump. If still nothing, the carburetor will likely need servicing. Go to:http://www.drystacked.com for an excellent article on Walbro carburetors--theory and repair. Pay particular attention to the positions of the lower chamber gasket and diaphragm. Good luck!
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I am using a 50:1 mixture. Where can I find the fuel filter on this model? I took the top and side cover off and don't see any hoses?
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