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Old 05-04-2015, 10:46 AM
rsudol rsudol is offline
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Join Date: May 2015
Posts: 3
LawnBoy YT14H Yard Tractor Issue

i recently aquired this unit from my wifes parents. I had complete overhaul or what i thought was one done. Now im having the following 2 issues.

1st Issue - As i am mowing it seems like i have a loss of power randomly. If i stop mowing and shut off mower, start it again i have no issues. It was suggested it sounds like its starving for fuel and to check the fuel cap. I did replace the Fuel Cap at an 80$ cost.

When i went to test again i now have this issue. That i go to crank over engine and, it sound like starter isnt even cranking or trying to.. Battery is brand new. I thought perhaps its a Battery Cable so i bought a new positive and negative cable, but before i replace i want to ask.

I know the mower is getting power as the low oil indicator lights up before cranking, and i can hear the fuel pump. Since the overhaul last month i have only fully mowed once and well partial a second time due to the power loss.

Service guys stated since the mower left them they cant honor work. BS if you ask me so looking for some thoughts.
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  #2  
Old 05-04-2015, 11:07 AM
Uncle Knuckle Uncle Knuckle is offline
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Posts: 397
By what you describe it sounds like multiple problems. If you are tired of needlessly spending money replacing good parts and your machine is having a condition where you turn the key to the start position but nothing happens, then why not address that first. Make sense? If so, then use the following procedure for a no crank condition:

Lawn mower no crank diagnosis

I wrote this procedure with tractor style mowers in mind but this works on zero turn mowers as well. For a zero turn mower, the steering levers must be out, parking brake engaged and the PTO switch in the off position. Some mowers have an operator presence switch in the seat and you may need an assistant to sit in the seat while performing the following tests.

Electrical problems can be very easy or very difficult, depending on four things:

1. How well you understand basic electricity.
2. What tools you have and know how to use.
3. How well you follow directions. Ahem.
4. You don't overlook or assume anything and test/verify everything.

Remember, I cannot see what you are doing. You are the eyes, ears and fingers in solving this problem. You must be as accurate as you can when you report back. The two basic tools I will ask you to use are a test light and a multimeter. If you have an assistant when going through these tests it would be very helpful. These steps work the best when done in order, so please don't jump around. Now let's solve this problem.

First, make sure parking the brake is engaged and the PTO switch is in the off position. Physically remove the negative battery cable first and then the positive battery cable and clean both the battery terminals and cable connectors with a wire brush. Reinstall cables after cleaning starting with the positive first and then the negative. Next, turn the key to the run position, check all fuses with a grounded test light – should light on both sides of fuse. Check battery voltage - above 12.5 volts should be good. Believe it or not, this first step will take the most amount of time, usually around five minutes and the rest of the steps can be accomplished in under a minute.

Second, check for power from the battery to one of the large terminals on the solenoid. One of the wires is connected directly to the battery and has power all the time so one of the large terminals should light a test light or show battery voltage on a meter at all times.

Third, check for power at the small terminal of the solenoid while depressing the clutch/brake pedal and holding the key in the start position (you may need an assistant to sit in the seat to override the safety switch). If your solenoid is a four wire solenoid, check both small wire terminals as one is ground and the other is power from the ignition switch. If your solenoid is a three wire solenoid, make sure the solenoid body is not corroded where it bolts to the chassis of the mower as this is your ground path back to the battery. If in doubt, remove the solenoid and clean the mounting area down to bare metal. If there is no power to the small terminal then your problem is most likely a safety switch, ignition switch or in the wiring. You should have battery voltage on this small solenoid wire when the key switch is held in the start position.

Fourth, check for power on the other large terminal of the solenoid while holding the key in the start position (you may need an assistant to sit in the seat to override the safety switch). You should have battery voltage on this terminal when the key is held in the start position.

Fifth, check for power at the starter while holding the key in the start position (assistant again). You should have battery voltage during this test.

Sixth, check your ground circuit back to the battery. Just like the battery, make sure connections are clean and tight. Very Important!

This procedure is a simple starting point and there is more to it so after you have gone through each of the above steps, let me know what happened when you performed each test. At that point I will have great info to tell you how to proceed. Remember you are the eyes, ears, and fingers, so please be as accurate as possible. Some lawnmowers use a relay in the starter control circuit so keep that in mind.

Be as specific as possible with voltage readings as this will help diagnose your problem quicker. If you do not know how to perform the above checks, just ask and I will try to guide you through it. I prefer to use voltage drop tests but some people get too confused over this subject so in an effort to keep it simple, for now, just follow the procedure and report back with your findings.
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  #3  
Old 05-21-2015, 12:45 PM
rsudol rsudol is offline
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Join Date: May 2015
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I want to thank you for assistance. It was a grounding problem compunded b a starter problem and an additional carberator problem.
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  #4  
Old 05-21-2015, 02:49 PM
Uncle Knuckle Uncle Knuckle is offline
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Join Date: Apr 2015
Posts: 397
Good job getting it sorted out. A machine with multiple problems can be very frustrating.
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