Why won't my Kohler generator shut off after exerciser cycle?

You will likely need to reference your instruction manual for that specific control panel.

Kohler Generator issue 20 RES - YouTube

? 0:24
www.youtube.com/watch?v=CT9u64dZna0
Apr 28, 2012 - Uploaded by Jeremy vanEyk
Brand new Kohler Generator Test cycle issue. ... Oh, and Mike, good call on the carb--that happens on some 20RES models. ...Indicates Locked Rotor (Lr). ... I'm on my second 20 RES-L,home depot swapped out the 1st one. ... Kohler 20KW RESA Whole House Standby Electrical Generator - Duration: ...

Maybe the start motor is damaged. You can check it first.

Power generation: www.dieselgeneratortech.com

The governor and / control maybe your issue. Also if you have the electronic governor model, check the speed sensor screwed in near the fly wheel, it should have approx 2VAC on it during crank.

On exercise it isn't under load, you may have too much gas pressure, have the gas pressure and fuel/air ratio checked on the mixer

If you have a drip leg near generator open that up for a sec and then try it again.

The monitoring system of our Kohler propane generator has sent a "UU" message. What does this mean as it causes the generator to shut down 10 seconds after starting? Also how can this be corrected?

U need to make sure that the relay driving ur auto start stay closed all thru the crank cycle.

http://www.homegeneratorsystems.com/service_support/manuals/index.cfm?rd=1

This link will take you to their site where you can download their manual.

Setting Exercise Timer
The Home Standby Generator is equipped with an exercise
timer that will start and exercise the system once every
seven days. During this exercise period, the unit runs for
approximately 20 minutes and then shuts down. Electrical
load transfer DOES NOT occur during the exercise cycle
(unless an utility power outage occurs).
A switch on the control panel is labeled “Set Exercise”
(depicted on page 10).The specific day and the specific time
of day this switch is pressed is programmed into the
control board memory.This date and time is then used to
automatically initiate the system exercise cycle.
To perform the Set Exercise procedure:
1. Choose the day and time you want your Home
Standby Generator to exercise.
2. On that day and time, set the AUTO/OFF/MANUAL
switch to OFF.
3. Press and hold down the “Set Exercise” switch for two
seconds.
4. Set the AUTO/OFF/MANUAL switch to AUTO.“Set
Exercise” is complete.
For example, if you press the “Set Exercise” switch on
Sunday morning at 10:00 AM, the unit will run an exercise
cycle the following Sunday at 10:00 AM (+/- 1/2 hour).
NOTE: “Set Exercise” will only work if the unit is in the
Automatic mode and this exact procedure is followed.The
exerciser does not need to be re-set if the 15 Amp fuse is
removed or changed.The exerciser will need to be re-set if
the 12 Volt DC battery is disconnected.
If you want to change the day and time the unit exercises,
simply perform the “Set Exercise” procedure at the exact
weekday and time you want it to take place.
• To prevent possible injury that might be caused by such sudden
starts, always set the AUTO/OFF/MANUAL switch to OFF.
• Remove the 15 Amp fuse before working on or around the
generator or transfer switch.

On your Automatic Transfer Switch ( the little gray box you see on the right in the picture above) you have two blue buttons. One is a Manual test switch. The other has a clock on it and this is your exercise set button. Hold it down for a FULL 3 seconds if you want it to excercise without a load (not powering your home) Hold it down for a FULL 6 seconds if you want it to exercise with a load every week. Your generator will start and run for 20 minutes, and then shut down. Now every week your generator will exercise at the time and day that you pushed the set button.