My friend has a John Deere 100 riding mower and it won’t start, after doing some research and checking out my own note, I think there are two possible places that might cause this.

I found these helpful videos and they provide some visual information for this

1. The starter solenoid coil failure
2. This lady did a good job on cleaning carburetor, successful story.
3. There are some common mistakes in starting the engine wrongly. 

I am writing this note to program a Kwikset Powerbolt Deadbolt Lock, and I find this helpful video. The guy did a fantastic job and he really deserves the credit. If people prefer to read instruction manual, here it is: powerbolt2-programming-instructions

A few important reminders:

The powerbolt is powered by 4 AA batteries
The reset button is located at the back (inside) of the lock, by pushing it down for 5 seconds until it beats, 
The manufacture master code is always: 0-0-0-0. 
Never make the master code same as the manufacture's master code
Beeping for twice is a successful sign, while beeping for 3 times is a bad one.

To reset the lock and get ready to program the pass code

1. Make sure the lock is in the unlocked position.
2. Remove the battery cover.
3. Press and hold the “Reset” button for 5 seconds. You will hear 3 long beeps after the 5 seconds is completed indicating the lock has been reset.

As a result, You will reset your User Code to 1-2-3-4 and Mastercode to 0-0-0-0 when the reset is complete.

To set locking/unlocking positions

1. Make sure the door is open and in the unlocked position.
2. Press 0 – 0 – 0 – 0 – LockSign – 0 – LockSign
Note: Each button represents two numbers (i.e. ONLY push the button once for 0). If you incorrectly enter the code, wait 10 seconds until you hear three beeps. Then you can try again.
3. If the step was completed correctly, the latch bolt will extend out and retract back in completely.
4. It should beeps twice.

What can go wrong, if you hear it beeps three times.

	
It must be set at completely unlock position
	
If you missed, it can be fixed by
	
Use key to turn it to lock position, then do:Press 0 – 0 – 0 – 0 – LockSign – 0 – LockSign
	
It should retrack back to unlock position, then reset to manufacture setting
	
Then re-do it.

To test the lock

1. Make sure the door is open and in the unlocked position.
2. Press LockSign
3. The latch will extend fully to the lock position and end with one beep and the keypad will turn off.
4. Enter 1 – 2 – 3 – 4 – LockSign
5. The latch will retract fully in the unlock position and end with one beep and the keypad will turn off.

To delete all user’s code

1. Make sure the door is open and in the unlocked position.
2. Enter the default Master Code 0 – 0 – 0 – 0 – LockSign – 5 – LockSign
3. The lock will beep twice and the keypad will flash Green.

To delete a specific user’s code

1. Make sure the door is open and in the unlocked position.
2. Enter the default Master Code 0 – 0 – 0 – 0 – LockSign – 3 – LockSign
3. Press that user's code – LockSign
3. The lock will beep twice and the keypad will flash Green.

To set user’s code
NEVER make user’s code as “manufacture default master code”, it allows up to 6 different codes.

1. Make sure the door is open and in the unlocked position.
2. Enter the default Master Code 0 – 0 – 0 – 0 – LockSign – 1 – lockSign
3. Enter a 4 to 10 digit code and press LockSign
4. The lock will beep twice and the keypad will flash Green.

The following advanced features may not needed for common usage:

To set one-time code
It ONLY allows one one-time code

1. Make sure the door is open and in the unlocked position.
2. Enter the default Master Code 0 – 0 – 0 – 0 – LockSign – 1 - 9 – lockSign
3. Enter a 4 to 10 digit one-time code and press LockSign
4. The lock will beep twice and the keypad will flash Green.

To changer the master code

1. Make sure the door is open and in the unlocked position.
2. Enter the default Master Code 0 – 0 – 0 – 0 – LockSign – 7 – LockSign
3. Enter a 4 to 10 digit code and press LockSign
4. The lock will beep twice and the keypad will flash Green

To mute or unmute beeping noise

1. Make sure the door is open and in the unlocked position.
2. Enter the default Master Code 0 – 0 – 0 – 0 – LockSign – 1 - 5 – LockSign
3. The will mute or unmute the beeping sound

To set auto-lock feature and set auto-lock time

1. Make sure the door is open and in the unlocked position.
2. Enter the default Master Code 0 – 0 – 0 – 0 – LockSign – 1 - 1 – LockSign
3. The will mute or unmute the beeping sound

The factory master code for all the locks are 0-0-0-0
One is allowed to program his/her own master code, BUT, never make this 0-0-0-0