Question about Husqvarna Garden
I have a Husqvarna 345 chainsaw. Runs excellent, has just had a tune-up (spark plug, fresh mixed gas, air filter, etc). Runs excellent until it has ran for 17-20 minutes (yes, I've timed it carefully), then it dies. Of course, at this point, the chainsaw (engine) is very hot, no doubt. So right away, I changed the gas in the tank, thinking it might be old/stale a bit? Anyways, within moments, I started it again, runs great, cuts great and all.... 20 minutes later, dies. What do you think may be causing this problem?
It sounds like it may be getting lean at that point, and it could be something like a tank vent. When this happens, open the filler cap, close it, and see if the saw will start.
Another easy test is to fill the tank completely in the event that a small hole has formed in the fuel line inside the tank. I doubt that is the problem, but worth the time to check before moving on to other tests.
If that doesn't work, disassemble the carburetor and clean all passages with non flammable brake cleaner (carburetor cleaner can damage check valves and soft small engine components). Sometimes dirt can accumulate in places that affect how the diaphragm moves.
If none of this works, have a service shop evaluate the unit. Pressure and vacuum tests will reveal the culprit(s) and determine if the saw qualifies for service.
Posted on Apr 23, 2014
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Posted on Jan 02, 2017
Sounds like it could be fuel starvation. I just had a case of exact same except mine finally worsened. Most likely and what I just encountered, its your fuel line. It's a quick and simple fix and you can do it yourself. Youtube has several videos showing you how to do it. Feel your tube, if it feels soft or spongy, it's probably got cracks or even a pin hole somewhere. It's $10 and as I've learned, one of the most common fixes when saws start cutting out at full throttle or under load. My dealer said he's been through 15 of them in the past 3 months.
Posted on May 07, 2009
First, check the fuel lines for cracks/breaks.
If they are o.k.,then you will need to disassemble the carburetor again and spray with carb.cleaner. Make sure the small screen in the carb. is free of debris. Usea 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.
Posted on Jun 14, 2009
I suspect she is flooded. Flooding is the most common cause of fails to start on a chainsaw. Remove the plug I bet it's wet.
I've a 359 one time I forgot to pull then push the choke (sets fast idle). My shoulder gets sore just thinking about it.
Posted on Nov 10, 2009
Fuel starvation - 'lean fuel' condition
Basic things to check:
1) spark plug
2) spark arrestor in muffler
3) fuel lines and tank filter
4) turn adjustment needles out (counterclockwise) 1/4 to 1/2 turn
5) check impulse tube and intake boot for cracks or leaks
*if all of the above are OK and/or do not improve performance then:
6) replace gaskets/diaphragms
a) use a spray carb cleaner to clean jets, holes, and body of carb
b) fuel pump diaphragm goes against the carb body,
then the gasket towards the outside
c) metering gasket goes against the carb body,
and the diaphragm goes towards the outside
Posted on Nov 25, 2009
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