Exmark Lazer Z SX Diesel Models 4500-501 Rev A - Manual (Page 21)

Operation
The voltmeter measure the voltage output of the
alternator. Both high and low voltages will potentially
damage the battery.
Glow Plug Switch and Light
Located on the right fuel tank.
Depress and hold the switch to heat the glow plugs.
The glow plug light comes on when the glow plug
switch is depressed. The glow plug light indicates the
glow plugs are preheating the combustion chamber.
Low Oil Pressure Light
Located on the right fuel tank.
Light will come on when engine oil pressure is low
or lost.
Warning Buzzer
Located behind the seat under the air deflector on
the electrical panel.
The buzzer is a warning signal that the engine
is overheating or the oil pressure is low. See the
Troubleshooting section.
Pre-Start
Make sure you understand the controls, their
locations, their functions, and their safety
requirements.
Refer to the Maintenance section and perform all the
necessary inspection and maintenance steps.
Determining Fuel
The engine runs on clean, fresh diesel fuel with
a minimum octane rating of 40. Purchase fuel in
quantities that can be used within 30 days to ensure
fuel freshness.
Use summer grade diesel fuel (No. 2-D) at
temperatures above 20°F (-7°C) and winter grade
diesel fuel (No. 1-D or No. 1-D/2-D blend) below
20° F (-7° C). Use of winter grade diesel fuel at lower
temperatures provides lower flash point and pour
point characteristics, therefore easing startability and
lessening chances of chemical separation of the fuel
due to lower temperatures (wax appearance, which
may plug filters).
Use of summer grade diesel fuel above 20°F (-7°C)
will contribute toward longer life of the pump
components.
Important: Do Not use kerosene or gasoline
instead of diesel fuel. Failure to observe this
caution will damage the engine.
Biodiesel Ready
This machine can also use a biodiesel blended fuel
of up to B20 (20% biodiesel, 80% petrodiesel). The
petrodiesel portion should be low or ultra low sulfur.
Observe the following precautions:
• The biodiesel portion of the fuel meet
specification ASTM D6751 or EN14214.
• The blended fuel composition should meet
ASTM D975 or EN590.
• Painted surfaces may be damaged by biodiesel
blends.
• Use B5 (biodiesel contend of 5%) or lesser blend
in cold weather.
• Monitor seals, hoses, gaskets in contact with fuel
as they may be degrade over time.
• Fuel filter plugging maybe expected for a time
after converting to biodiesel blends.
• Contact your distributor if you wish for more
information on biodiesel.
Filling the Fuel Tank
1. Shut the engine off and set the parking brake.
2. Clean around each fuel tank cap and remove the
cap. Add fuel to both fuel tanks, until the level is
1/4 to 1/2 inch (6 to 13 mm) below the bottom
of the filler neck. This space in the tank allows
the fuel to expand. Do Not fill the fuel tanks
completely full.
3. Install fuel tank caps securely. Wipe up any fuel
that may have spilled.
4. If possible, fill the fuel tank after each use. This
will minimize possible buildup of condensation
inside the fuel tank.
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