Operation - Murray MP450 Operator's Manual

NOTICE: The engine does not contain OIL or PETROL.
Before you start the engine, make sure you add oil according
to the instructions in the Operator's Manual for the engine. If
you start the engine without oil, it will be damaged beyond
repair and will not be covered under warranty.
For the type of petrol and oil to use. See the Operator's
Manual for the engine. Before you use the unit, read the
information on Safety, Operation, Maintenance, and Storage.
How To Change The Mulcher Plug - Figure
WARNING: Before you remove or install the
mulcher plug, disconnect the spark plug wire and
keep it away from the spark plug.
Some models have an optional mulcher plug (A). See Figure
10. Use the mulcher plug to mulch the grass for a clean, fine
cut. To discharge the grass into the grass bagger, remove the
mulcher plug.
How To Install The Mulcher Plug
1. Raise the rear door (B). See Figure 10.
2. Slide the mulcher plug (A) into the discharge opening.
How To Remove The Mulcher Plug
1. Raise the rear door (B). See Figure 10.
2. Remove the mulcher plug (A) from the discharge opening.
How To Assemble
The Side Discharge Chute - Figure
WARNING: Before you remove or install the side
discharge chute, disconnect the spark plug wire
and keep it away from the spark plug.
1. Raise the mulch cover (A). See Figure 11.
2. Slide the two tabs (B) on the side discharge chute (C)
under the pivot rod (D).
3. Lower the mulch cover (A). See Figure 12.

Operation

Illustrations and pictorials begin on page 2.
Engine Stop Lever - Figure
Release the engine stop lever (A) and the engine and the
blade will automatically stop. To start and run the engine, hold
the engine stop lever (A) in the operating position (B).
Before you start the engine, operate the engine stop lever
several times. Make sure that the engine stop cable moves
freely and that the engine stop lever operates correctly.
How To Stop The Engine - Figure
To stop the engine, release the engine stop lever (A).
Disconnect the wire and keep it away from the spark plug to
keep the engine from starting.
en
10
11 12
13
13
Rear Wheel Drive System - Figure
WARNING: For safe operation, the drive system
must immediately disengage when the drive lever is
released. If the drive system does not disengage
correctly, do not operate the mower until the drive system is
adjusted or repaired by an authorized service centre.
Self-propelled models have a rear wheel drive system.
Operate the drive system as follows.
1. Hold the engine stop lever (A) in the operating position.
Start the engine.
Note: To stop the engine, release the engine stop lever
(A).
2. Push the drive lever (C) completely forward. The drive
system is now engaged and the mower will move forward.
3. To disengage only the drive system, release the drive
lever (C). In the disengaged position (D), the mower will
stop moving forward but the engine will continue to run.
4. To disengage both the drive system and also to stop the
engine, completely release the engine stop lever (A).
Note: When the drive system is disengaged on a new unit, it
is possible for the rear wheels to rotate if lifted off the ground.
This is normal with a new belt and will stop after one or two
hours of operation.
How To Start The Engine - Figure
WARNING: The blade will rotate when the engine
runs.
Important: Before you start the engine, operate the engine
stop lever several times. Make sure that the engine stop
cable moves freely and that the engine stop lever operates
correctly.
1. Check the oil. See the Operator's Manual for the engine.
2. Fill the fuel tank with regular unleaded petrol. See "How
To Prepare The Engine".
3. Make sure the spark plug wire is connected to the spark
plug.
4. Engines with primer: For most temperature conditions,
firmly push the primer bulb (E) three times. See Figure 15.
In cooler weather, additional priming may be needed. A
warm engine will usually not require priming. Every time
you push the primer button, wait two seconds.
Note: When starting a new engine for the first time, push
the primer bulb five times.
Note: Excessive priming can flood the carburettor with
fuel. See "The Engine Will Not Start" in the
Troubleshooting section.
5. Self-propelled models: Make sure the drive lever (C) is
in the disengaged position (D). See Figure 14.
6. Stand behind the mower. Use one hand to hold the engine
stop lever (A) in the operating position. See Figure 5. Use
the other hand to hold the recoil starter handle (I).
7. Slowly pull the recoil starter handle until resistance is felt,
then pull quickly to start the engine. Slowly return the
recoil starter handle.
8. If the engine does not start in 5 or 6 tries, see the
Troubleshooting section.
14
5 14 15
9