Homelite Chainsaw starting problem

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  #1  
Old 11-22-13, 04:51 PM
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Homelite Chainsaw starting problem

I can't start my chainsaw. It is a homelite 3314 with a Walbro WT 673 carb. It was working OK and then just stopped. I checked the fuel lines and they were corroded in the tank and fell apart. Filter looked OK. i replaced both the fuel line with the filter and the return line. Now it won't start and the primer bulb sticks in (and doesn't pop out) so fuel doesn't get thru the system. I don't see any cracks in the bulb. It will partially start if I spray carb cleaner directly in the carb, but then die because no other fuel is getting thru. I checked the spark plug and that is still sparking.
I am not qualified to try to take apart and clean the carb without help. The filter may be clogged.
Any suggestions? Home Depot sells a replacement filter/bulb/fuel line. I plan on trying that next
Thanks.
 
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  #2  
Old 11-23-13, 05:00 AM
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Welcome to the forums! I think changing out the entire component, ie. bulb, hoses and filter would be a good start. Also make sure you have the suction and return lines in the same position as when you removed them.
 
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Old 11-23-13, 06:15 AM
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Ethanol fuel is the main cause of the lines failing.
Use nonethanol or at least use an additive to counter act the effects of it.
Any place that sells gas power equipment will have it and or the premixed gas with nonethanol fuel.
 
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Old 11-24-13, 01:41 PM
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Follow-up

I replaced the primer bulb, and the new one seem to work, but still having trouble. I also have fresh gas in it. It started up but then quickly died. It was putting out a lot of smoke.
When I prime it 3 times, gas starts coming thru the carb. Not sure of the problem now. The spark plug is also wet with gas.
 
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Old 11-24-13, 04:30 PM
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Gas shouldn't be coming out of the carb when priming. If it is, the lines are connected wrong or something is wrong in the carb.
 
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Old 11-24-13, 04:53 PM
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That's what I thought, so I tried switching the lines into the primer bulb, but then only air went thru the line.

My connections are:

Line from fuel tank (with filter) goes into the intake on the side upper part of the carb (Walbro WT).
Second line from carb (angled fitting about halfway up the side of the carb) goes into the primer bulb on the longer nipple
Third line from the primer bulb (short nipple) back into the fuel tank.

Gas fills right up in the bulb when I prime it with this set up.
 
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Old 11-24-13, 05:25 PM
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Not knowing exactly what carb is on it, generally the fitting at the middle of the carb is the inlet and the one near the cover would be the return. If this is the case, the line with the fuel filter goes to the fitting in the middle of the carb that is angled. The other fitting should have a short line that goes to the suction fitting on the primer (press the primer and let go... the fitting that sucks in when you let go is the suction line). Then, the pressure line that pushes gas out when you press the primer goes back to the tank.
 
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Old 11-25-13, 11:02 AM
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Thanks. it is the Walbro WT 673. I will try it again this afternoon and report back.
 
  #9  
Old 12-01-13, 01:51 PM
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I redid the fuel lines and I think it got it right. No more fuel leaking thru the carb. Now it fires up for 10-15 seconds and then dies. it also produces a lot of smoke during those 10 seconds.
Any other suggestions?
 
  #10  
Old 12-01-13, 02:34 PM
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Too much smoke makes me suspect three things. First, wrong mixture settings. I'd start with the screws that control the mixture settings. In my experience I can usually screw them all the way in, then screw them out one full turn, and get it to crank. The second is too much oil in the gas. I've forgotten to put oil in the gas before, so I can easily imagine thinking I hadn't put oil in, and doing it again. The last thing is worn ring(s). If the other two thing don't fix it, I'd do a compression test and compare to what I could find on the internet for your engine's compression.
 
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Old 12-01-13, 05:04 PM
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Too much smoke could be it burning off oil that accumulated in the crankcase when the carb was leaking. Try to keep it running full throttle for as long as you can, feathering the choke if it helps, and see if it quits smoking so much. If no, it's probably running too rich.
 
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