Question about Husqvarna 450 e-series 18" Chain Saw

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I have a Husqvarna 50 that I purchased new in 1986. Great saw with few hours. Last time when I started it I found it would not run to full speed and did not have any power. I put new gas in it and no change. I changed the spark plug and no change. I then took the carb apart and could not find any dirt or issues. I then disconnected the fuel filter and it still did not run at full speed. I then took the top end apart and installed a new piston ring. No difference. I have no idea what to do next. Any ideas? Thanks

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I think you went too far, you should have opened up the high speed jet, it would have revved up and ran at high speed no problem, but since you rebuilt it, it should be good to go. The jets are very sensitive, just a 1/4 turn at a time should be enough. If it doesn't do anything after a few turns, turn it back to where it was, count the turns, then start to close it down 1/4 turn at a time, if it still doesn't run, put the jets back to factory settings, 1 1/4 turns out each should get you started, then fine tune from there,did you clean those jets when you had the carb apart? Check it out, you can get those things out without removing the carb. Make sure they are clean, if they have holes in them, make sure they are clear. Hope this helps.

Posted on Aug 06, 2010

  • dmalarik Aug 06, 2010

    Thanks, I did try to adjust the high speed jet by turning it slightly to get a higher rpm while I held the unit at full throttle. Turning in would drop the rpm, turning out a 1/4 turn or more out and it would die. I will pull it out all together and look for blockage. Any point in rebuilding the carb if the high speed jet looks clean.

  • Ned  White
    Ned White Aug 06, 2010

    I had a bike once that wouldn't run right, kept stalling and wouldn't rev, sputted and missed, we took a shot of carb cleaner in the throttle and that thing came to life, never missed again. We don't know what it was, but we were going to pull the carbs off and redo them. I don't know what is going on with yours, but I would blame the carb. It has to be a combination of the mixes. Unless the chain is bogging down on the bar? does it slide free? You did mix oil in the gas? Try squirting gas in the cylinder to see if it races? Put your question back on and see if somebody else has had the problem. My Husky has never even sputted once in 20 years. Unbelievable, hope this helps.

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