Operating your lawn mower, Starting the engine, Stopping the engine – Cub Cadet 439 User Manual
Page 9: Using your lawn mower, Warning
 
9
Using as Mulcher
For mulching grass, remove the grass catcher or side 
discharge chute from the mower. Refer to Setup section 
for instructions. For effective mulching, do not cut wet 
grass. If the grass has been allowed to grow in excess 
of four inches, mulching is not recommended. Use the 
grass catcher to bag clippings instead.
Using Grass Catcher
You can use the grass catcher to collect clippings while 
you are operating the mower. 
1. Attach grass catcher following instructions in Setup 
section. Grass clippings will automatically collect in 
the bag as you run the mower. Operate the mower till 
the grass bag is full. 
2. Stop engine completely by releasing the blade
control. Make sure that the unit has come to a 
complete stop. 
3. Lift discharge door and pull grass catcher up and
away from the mower to dispose of the grass 
clippings.
Using Side Discharge Chute
Instead of collecting grass clippings in the bag, you may 
attach the side discharge chute to expel the clippings. 
Refer to the Setup Section for instructions on attaching 
the side discharge chute.
Starting the Engine
WARNING: Be sure no one other than the 
operator is standing near the lawn mower 
while starting engine or operating mower. Never 
run engine indoors or in enclosed, poorly ventilated 
areas. Engine exhaust contains carbon monoxide, an 
odorless and deadly gas. Keep hands, feet, hair and 
loose clothing away from any moving parts on engine 
and lawn mower. 
Refer to engine manual for help with the engine.
1. Place the fuel valve lever found on the left side of the 
engine into the ON (OPEN) position, Figure 4-2.
2. Move the choke lever all the way backward into the
choke position.
3. Standing behind the mower, squeeze the blade control
against upper handle, Figure 4-2. The choke will now 
begin to slowly return to the off choke position after 
activating the blade control. Therefore, quickly move 
onto step four below. 
4. Holding these two handles together firmly, grasp recoil
starter handle and pull rope out with a rapid, continu-
ous, full arm stroke, Figure 4-2. Keeping a firm grip on 
the starter handle let the rope rewind slowly. Repeat 
until engine cranks. Let the rope rewind each time 
slowly.
WARNING: Wait for the blade to stop com-
pletely before performing any work on the 
mower or to remove the grass catcher.
Stopping the Engine
1. Release blade control to stop the engine and blade.
2. Disconnect spark plug wire from spark plug and 
ground against the engine.
Using Your Lawn Mower
Be sure lawn is clear of stones, sticks, wire, or other 
objects which could damage lawn mower or engine. 
Such objects could be accidently thrown by the mower 
in any direction and cause serious personal injury to the 
operator and others.
WARNING: If you strike a foreign object, stop 
the engine. Remove wire from the spark plug, 
thoroughly inspect mower for any damage, and repair 
damage before restarting and operating. Extensive 
vibration of mower during operation is an indication 
of damage. The unit should be promptly inspected 
and repaired.
4
Operating
Your Lawn
Mower
WARNING
The operation of any 
lawn mower can result 
in foreign objects being 
thrown into the eyes, 
which can damage your 
eyes severely. Always 
wear safety glasses while 
operating the mower or 
while performing any 
adjustments or repairs 
on it.
Be sure no one other than 
the operator is standing 
near the lawn mower 
while starting engine or 
operating mower. Never 
run engine indoors or 
in enclosed, poorly 
ventilated areas. Engine 
exhaust contains carbon 
monoxide, an odorless 
and deadly gas. Keep 
hands, feet, hair and loose 
clothing away from any 
moving parts on engine 
and lawn mower. 
Never operate your mower 
without either the rear 
door or the entire grass 
catcher assembly firmly 
secured.
Figure 4-2: Starting the mower.
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