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Lawn Mower Repair: Dying Engine and Safety Seat Switches

By Asiantnsuy Subscribe to RSS | June 29th 2012 | Views:

Have you ever tried to employ the mowing deck or release the brakes from your lawnmower and suddenly the engine dies? If so, then it’s probably a damaged seat switch also known as the operator presence switch. While it is the most common problem with lawn mowers these days, not many people or shops are able to diagnose it properly. The problem is that even though there is zero voltage people still expect to see some type of voltage through the wires located at the seat switch. On a lot of the push lawn mowers and other types of mowers, you can actually test to see whether or not the problem is with the switch by disconnecting the kill wire. You can expect brands such as Stratton, Briggs and Kohler have those simple ground wires that can be disconnected. Understanding this problem and knowing the lawn mower repair you have to perform is what we will talk about today.

Lawn Mower Repair: Diagnosing Common Problems

If you take a look at the engine on your lawn tractor, you will see a speed control bracket that is metal on the engine. You will also see throttle wires connected as well as a plastic connector and wire combined. Once you do, you can start the simple lawn mower repair. First, you have to disconnect the wire from the plastic clipping without letting it touch any other lawnmower parts and see if the engine will still run. Sometimes grounding the wire to metal is necessary in order to be able to shut it off. It all depends on the make and year of your lawn mower.

With most big or small lawn mowers the switch is encouraged to function by grounding coil. This happens when the switch is under the impression that no one is in the driver seat, the PTO is employed and the parking brakes are released. So, if you notice the riding mower engine still running, you can move on to the seat switch. In our lawn mower shop we are known for replacing the switches with one that works well. However, some people don’t have this luxury and should use a continuity light or ohmmeter to test their switch.

Lawn Mower Repair: Lawn Mower Troubleshooting

When it comes to seat switches, there is a large selection. Some are small, rectangular, large, round and even encased in plastic. Yet, there are only two ways in which they can work; open or closed. What the test entails is that when the test is done in one position, it should have continuity all throughout the switch. In another position, it should have no continuity at all. To test using one end of your continuity light and ohmmeter both opened and closed. If you have at least 4 wires, then it’s best to seek the help of a professional considering they will be using colors that correspond.

Whether there is too much continuity in your switch or never any in it, you’ll probably just need to replace it anyway. Choosing parts to use for repair lawn mower such as switches is simple. Open switches are usually made of copper which can adjusted to position it just right. Safety switches used in riding mower repair can be a pain in the rear because they are difficult to troubleshoot and the problems that occur are often disguised as other problems. However, they should never be disconnected. We have actually had people come into our shop who have bypassed the switch. Once they’ve done this, they automatically think that they have eliminated a problem when they have actually caused another one. This makes it difficult for the engine to fire and for the mower to start.

Asiantnsuy - About Author:
Author runs a Blog on how to Lawn mower repair and is being doing it for over 15 years and would like to share his knowledge and know-how with others that need help.Please Click here...

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