Murray MP450 Manual Del Operario página 8

How To Prepare The Engine
WARNING: For the type of petrol and oil to use,
see the Operator's Manual for the engine. Al-
ways use a safety petrol container. Do not
smoke when adding petrol to the engine. When inside
an enclosure, do not fill with petrol. Before you add
petrol, stop the engine. Let the engine cool for several
minutes.
CAUTION: 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 in-
formation on Safety, Operation, Maintenance, and Storage.
How To Change The Mulcher Plug
WARNING: Before you remove or install the
mulcher plug, disconnect the spark plug wire
and keep it away from the spark plug.
(Figure 8) Some models have an optional mulcher plug. Use
the mulcher plug (A) to mulch the grass for a clean, fine cut.
To discharge the grass into the grass bagger, remove the
mulcher plug as follows.
How To Remove The Mulcher Plug
1. (Figure 9) Raise the rear door (B).
2. Remove the mulcher plug (A) from the discharge opening.
How To Install The Mulcher Plug
1. (Figure 9) Raise the rear door (B).
2. Slide the mulcher plug (A) into the discharge opening.
Operation
Illustrations and pictorials begin on page 1.
Engine Stop Lever (Figure 10)
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 10)
To stop the engine, release the engine stop lever (A). Discon-
nect the wire and keep it away from the spark plug to keep
the engine from starting.
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Rear Wheel Drive System (Figure 11)
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 le-
ver (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
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. (Figure 12) Engines with primer: For most temperature
conditions, firmly push the primer bulb (E) three times. 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 Troubleshoot-
ing section.
5. (Figure 11) Self-propelled models: Make sure the drive
lever (C) is in the disengaged position (D).
6. (Figure 13) Stand behind the mower. Use one hand to
hold the engine stop lever (A) in the operating position as
shown. Use the other hand to hold the recoil starter han-
dle (F).
7. Slowly pull the recoil starter handle until resistance is felt,
then pull quickly to start the engine. Slowly return the re-
coil starter handle.
8. If the engine does not start in 5 or 6 tries, see the Trouble-
shooting section.
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