Replacing front drive cable.

adjust the cable to the stop on the end of the bracket behind the carby body
remove the recoil starter and replace the spring

The Toro 20016 mower is a front wheel drive mower and fairly simple to change the belt on. Start by disconnecting the spark plug to prevent start ups while working on the machine.

Remove the blade and adapter. The adapter includes the pulley for the belt.
two screws under the mower, with 3/8 heads hold the black cover over the belt. remove the cover and now you will see the transmission
The transmission, depending on the year of your machine will have a guard holding the belt on. Bend or remove the guard to remove the belt. Install you belt in reverse order.

You can get parts and special tools like the blade stop at a store like www.arcolawn.com

The transmissions gear is bad need to replace

Remove the left wheel and check the gears inside the wheel and the drive sheft. They might be worn or sheared and need renewing or maybe they just need oiling. Spray them with WD 40.

You have to remove the whole engine air shroud over the flywheel to gain access to the recoil and rope mechanism. If you need specific help on your exact model engine I need all of engine model type numbers 5 to 6 char then 4 char then 2 char i.e XXXXXX-YYYY-ZZ for B & S Honda numbers are by the engine oil port on the base of the crank case. Thanks for using FixYa, Kelly

Note your Model Number and click HERE for parts drawings. Locate your part number and call your local shop for purchase.

Hope this is helpful,
Dolf-

it isn't the spark plug if it wont turn over. maybe your battery is dead.

the belt. or the belt tensioner.

that cable your pulling on has adjusters you need to adjust it and tighten it

If you take the wheels off and remove the belt from the small pulley on the the front axle underneath the pulley you should see a small transmission. You usually can split this unit in half . You will see two gears and sometimes one plastic and one metal. The plastic one is usually the culprit. Hope this will help you out. Donnyb60