Author Topic: husqvarna 445 wont start  (Read 3722 times)

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Offline phil1863

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Re: husqvarna 445 wont start
« on: June 04, 2017, 07:16:16 am »
Thanks everyone for your valuable input.  Using the carb cleaner as a method to get the chainsaw to start I had read on another forum(wash my mouth out).  As suggested I obtained a compression tester and tested the compression.  I was fairly confident that it would be fine.  Wrong again!!! Either I am doing something totally wrong or the new compression tester is'nt working!!!  I tie wrapped the throttle, made sure the compression release button was fully up and pulled the starting rope at least 6 times.  The dial only shows 55 psi. :o.
As suggested I took the muffler off and looked at the cylinder.  In my novice opinion it looked fine.  No scractches that I could see, and the piston ring looked ok.  I am very dissapointed because I have used the saw so little.  What to do next??

Whilst waiting for the compression tester I did remember that last year ( at least 3 or 4 fuel fill ups ago ) that I very stupidly put chain oil in the fuel tank!!!  :-[. I know it was very stupid!!!!
I realised what I had done straight after, and quickly emptied and flushed the tank.  Could this somehow have lead to this problem???

My plan at the moment is to test the compression gauge on something else and see if it looks to be working, not sure what yet.

My second thought is could it be the compression release button.  I dont think so, as the reading is even lower when the button is depressed.  How can I check it though?

If the compression tester is ok (being new I would expect it to be) how should i take it from here.  I am still game to have a go at fixing it myself.  Before I do that I think I need to understand what i have done to break it in the first place.  I alway used husqvarna engine oil and mixed it to between 50:1 and 33:1. The strange thing is, as well that the chainsaw seemed to be cutting fine when I last used it and simply ran out of fuel???  Does that make sense?? In those last few seconds the engine started going faster like it always does when its about to run out of fuel.  It did'nt just stop, I turned it off!!!  Any thoughts?

Thanks again for your help!!!

 

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