My Husqvarna LOY-TH20F42 has slowly been losing power over the last 2 years or so. If I have to go up a hill it will slow or even stop. If I depress the pedal fully it will not do anything for a few seconds and then it may whine or not but the wheels will stutter for a moment and then suddenly launch forward and seem to have good power and speed so long as I keep the pedal fully depressed. If I back off so I can go slower and I have to climb again or do a very tight turn it will slowdown or stop until I depress the pedal fully and it again delays (often whining) and acting as if its "spooling up" and then launches off at high speed. I want to suspect the hydrostatic transmission is low on oil but the manual says it a sealed unit and the oil doesn't require any maintenance. So what are the possible reasons for this problem and what are some solutions I could try (short of taking it to the local lawn tractor dealership)? I should add that I did try changing the drive belt (the only thing I've tried so far)... didn't solve the problem. I should also add the mower is about 5 or 6 years old and only has 218 hours on it. The engine runs fine all the time and doesn't strain or complain. Also there is no difference with the way it acts whether the blades are engaged or not.
Get a new drive belt
Testimonial: "Thanks... that was the first thing I tried, so apparently the problem's not with the drive belt. Actually that's the only thing I've tried so far, I probably should have mentioned it."
check and make sure the belt is on right,you shouldnt have to push on the peddle to go faster,it should be fully engaged when released,you have the belt on the wrong way on the clutch pulleys,heres your parts manual http://www.husqvarna.com/ddoc/HUSI/HUSI2...
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http://repairhelpcenter.blogspot.com/2011/11/how-exactly-vehicles-accelerator-cable.html
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http://repairhelpcenter.blogspot.com/2011/11/how-exactly-vehicles-accelerator-pump.html
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-----------This will help.Thanks.
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It does sound like trans problem, sealed or not..take a look around the trans is there an oily area? If so there has to be a fill plug remove it and check the oil level...if ok your trans is going...good luck...
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