Installed a Kohler comfort Hight toilet at the cottage about a year ago. This week it started running after every flush. Seems like the float gets stuck 1/4 inch below the stop which creates a slow running of water. I could not see any reason foe it to get caught. Tried bobbing it up and down which stopped the running until the next flush when it would happen again. Any suggestions? Thanks!

you can't just replace 1 part in a toilet, your flapper is worn and needs replaced as well.

Try adjusting the float level. The float is what tells the toilet to stop filling. If the float is set too high, then water will just go down the overflow tube and never be able to get to the level it needs to turn off.

If the water keeps running, where is it going?
If it is going into the overflow tube, lower the water level setting.
Gary

The exact cause of a Kohler Cimarron toilet running non-stop depends on the exact model of toilet owned. In some, the lift chain connected to the handle can become kinked, preventing the ball seal from covering the drain completely. Just unkink the chain to fix this. In other cases, the float ball is stuck against the side of the tank, preventing it from returning to its normal horizontal position. When this happens, the toilet's tank doesn't stop filling with water. The excess continuously flows into the overflow pipe. Dislodge the float ball from the side of the toilet and this should clear the problem. Likewise, you might consider shortening the armature on which the float ball sits, so it won't become stuck again.

Read more: Troubleshooting a Kohler Cimarron Toilet ' eHow.com http://www.ehow.com/how-does_5017443_troubleshooting-kohler-cimarron-toilet.html#ixzz1CxKmz9ZQ

The Kohler Cimarron is one of the most popular and reliable toilets out there. (My Favorite). However, depending on the hardness of the water and if you use cleaner tabs in the tank, these factors can lead to a malfunction.
The first thing you should do is hold the flapper (rubber seal inside the tank that releases the water down to the bowl) down with your hands for a few seconds after a flush and see if the toilet stops running. Sometimes the flapper doesn't seal properly therefore the fill valve keeps working non stop. Stopping the fill while holding the flapper down will confirm that your flapper needs to be changed.
If this doesn't work then try this....
The other common problem with a running toilet is with the fill valve itself. There is an attached float on the fill valve that goes up and down depending on the water level. Once the water level rises, it rises the float, and the float tells the fill valve to stop filling the tank. While the toilet is running (hissing), try raising the float all the way up with your hand and see if it stops. If it stops but not consistently with every attempt, then you will need to change the fill valve. I believe the Fluidmaster 400A is the replacement model.

You may have a slight restriction stuck in the goosneck of the toilet or in the pipe elbow.........If you have little ones they seem to test our knowledge sometimes.Hope this helps.

Found your part: http://www.kohlerserviceparts.kohler.com/AccessoriesInformation.aspx?ServicePartID=f5a368efd5b74bcfae7fa0d0bb69bd39

low water in the bowl is only caused by the float being to high! the gurgles is Usually because of air coming back up through the pipe, check your vent pipe that come out the roof. this will help the draining.

Thanks

Kohler is correct. The most likely cause of this problem is an obstruction in the common vent stack that both toilets share. When you flush the old toilet it need more air to flush and will get it from the easiest source (your new water saver toilet). First adjust the float level in the old toilet so it won't use as much water or just stick a brick in the tank to take up space.Second, run a snake down the vent stack from the roof to check for obstructions. Birds will sometimes nest in there.