Hey I know I'm really late to this conversation but I wanted to add my opinion for future readers. Don't ever use kitty litter to clean up fuel or oil! I learned about marrying my husband that this can cause major problems when you throw that stuff out since it doesn't really properly absorb the oil/fuel. There's a range of other things out there that range in price but are super effective. Look up Goop cleaner, SpillFix, environmentally friendly oil cleaning solutions...you'll get much better results and won't create any pollution issues!

In looking at the wiring diagrams for both the machines (917.276020 & 917.276310), I see no differences between the two except for the Kohler version (020) featuring an operator presence relay where the Briggs version (310) features a more "complex" seat switch to accomplish the same goal. If,........you are connecting the white wire to the small terminal on the starter solenoid, you are making the correct connection,........AND the solenoid is in fact mounted to a grounded, metal surface or has been provided with a separate grounding jumper wire to ground the solenoid case! So, you might want to test that the solenoid is grounded by touching the probe of a test light (or volt meter) to the battery positive post and the other end/lead to the metal case of the solenoid body. If you detect voltage or the light burns, the solenoid is grounded. If you don't detect voltage, it is not grounded and you need to address that first. So let's go through some checks to determine what the trouble might be. The following outline is a step by step that will guide you through. Refer to the wiring diagram for your 917.276020 for the identifying "alpha characters" I refer to in the text. Make certain there is not a blown fuse before you do these tests. (begin test outline) It could be a "bad key switch" but my feeling is "bad clutch/brake switch", but it could be a "bad PTO switch" just as easy, so let's do some testing first. You have a volt meter and/or 12V test light? Be advised that moving or wiggling wires while doing these tests could result in continuity being accidently restored AND this might cause the starter to engage when you don't expect it to. To guard against this, unplug the small white wire from the starter solenoid and cover the wire terminal with tape to prevent a short. First off, you will need to access the backside of the key switch. Step 1. Find the WHITE wire on the back of key switch connector. (leave the connector attached to the switch) While holding the key in the start position, probe the area where the white wire enters the connector body with a test light or a volt meter. You should detect voltage on the test light or the volt meter. If you do not detect voltage, replace the key switch. If you detect voltage, go to step 2. Step 2. Find the PTO switch and identify terminals C & G on the switch. Probe terminal C while the key is in start position. If you detect voltage at C, probe terminal G next. If you detect voltage at C but not at G, replace the PTO switch (make double dang sure the PTO switch is in the OFF position). If you detect voltage at C & G, go to step 3. Step 3. Locate the clutch/brake interlock switch (should be near the pedal or close by, must be attached so pedal linkage can operate the switch. This switch will feature 4 wires, 2 will be white. With the key in the start position, and the pedal locked or held down, probe the white wires of the brake/clutch switch. If you detect voltage on one white wire only, make certain that the switch plunger is actually moving in far enough to operate the switch. If the plunger is moving far enough to operate the switch, but you still detect voltage on just 1 white wire of the switch, replace the clutch/brake switch. The seat switch does not inhibit cranking on this mower, it only functions to kill the ignition spark. Malfunctions in the PTO switch or the clutch/brake switch are capable of killing spark AND inhibiting the starter. Remember to reconnect the white wire to the starter solenoid after testing. I hope this helps in troubleshooting the interlock circuits. (end outline) After doing these tests, post back your results.

Here is a little more information that might help clarify the purpose of the diode across the PTO coil (paraphrased from a Wikipedia article): The functional name given to the diode is a 'snubber'. Snubbers are frequently used in electrical systems with an inductive load (PTO coil) where the sudden interruption of current flow often leads to a sharp rise in voltage across the device creating the interruption (the PTO switch). This sharp rise in voltage is a transient and can damage and lead to failure of the controlling device (PTO switch). When the current flowing is DC, a simple rectifier diode is often employed as a snubber. The snubber diode is wired in parallel with an inductive load (such as the PTO coil). The diode is installed so that it does not conduct under normal conditions. When current to the inductive load (PTO coil) is rapidly interrupted (by the PTO switch), a large voltage spike would be produced in the reverse direction (as the inductor (PTO coil) attempts to keep current flowing in the circuit). This spike is known as an "inductive kick". Placing the snubber diode in inverse parallel with the inductive load (PTO coil) allows the current from the inductor to flow through the diode rather than through the switching element (PTO switch), dissipating the energy stored in the inductive load over the series resistance of the inductor (PTO coil) and the (usually much smaller) resistance of the diode. So, this inductive kick does not feed back into ground or into any other part of the engine such as the starter (as mownie correctly mentioned). The potentially damaging energy is dissipated in the series resistance of the diode and the PTO coil.

Outsmarting the tree rats (squirrels) around my house is a full time job. This past spring I hit on a new idea. When I plant a container I invert an empty wire hanging basket over the container and the plant gets sun and can be watered but the squirrels can't dig in it. Another idea: I bring in a lot of plants to "over winter" under lights in my garage. I have so many that it is hard to reach my hand under the lights (4 shop lights) to the middle for watering. So I bought a pump sprayer with a long wand and it works great! In late winter I add a little liquid Dawn detergent, few drops, to each gallon of water and not only does the soil get wet easier but the worms that are waiting to hatch into distructive pets just don't hatch. Don't know what it costs me to run those four shop lights all winter but I don't care. It is a small price to pay to be able to "garden" every weekend in the garage. Many people have mentioned that they mark their outdoor plants with a "permanent Sharpie". In my experience there isn't a "permanent Sharpie", they all fade and quickly too. A grease pencil/china marker or expensive "no fade" garden center marker are the only markers I have found that won't disappoint you by fading. Eight years ago I decided to learn about gardening so I tapped into my local library. I checked out nearly every book they had on gardening and learned so much. The Gardenweb forums are also a wealth of information and entertainment. There is always something new to learn and I appreciate all of you who take the time to write in your ideas. One last idea from me...I keep a small notebook on my computer table and jot down any idea I find that's new and I will want to try. Little pieces of paper get lost but I always know where my notebook is and also use it when I order "on line" so I will remember the name of the company and the order date. Tina or Trowelgal