Exmark Lazer Z Operator's Manual page 36

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Drain coolant when engine is cool. Coolant may be drained from the radiator by
loosening the drain cock in the right rear corner. The engine block may be
drained by removing the rear radiator hose and/or by removing the drain plugs
from the engine block. The plugs may be accessed from the back of the engine
and are located in either cylinder wall adjacent to the main engine block. The
plugs may be distinguished as hex head bolts with a black finish. See Figure 8.
a) Re-install all drain plugs and hoses and tighten drain cock.
b) Fill radiator with a 50/50 mix of water and engine coolant (as specified in
Section 2.5.2), allowing some room (approximately 1/2") for expansion. Add
50/50 coolant mix to overflow bottle on the left side of the engine as
required to bring the level up to the indicator line on the bottle.
POTENTIAL HAZARD
♦ Engine compartment contains open belt drives and fans.
♦ Rotating components can cause injury
WHAT CAN HAPPEN
♦ Fingers, hands, loose clothing or jewelry can get caught
by the rotating fan and drive shaft.
HOW TO AVOID THE HAZARD
♦ Do not operate machine without the covers in place.
♦ Keep fingers, hands, and clothing clear of rotating
components.
♦ Shut off engine and remove the ignition key before
performing maintenance.
e) With the cap off the radiator, tilt hood closed and put the seat down. Start
the engine. Refer to Section 4.3.2. Return the seat up and hood forward to
the open position.
f) Operate engine until the engine thermostat opens and coolant is circulating
through the radiator core. As air is purged from the engine block and the
coolant level drops, add additional coolant to the radiator.
g) When the radiator is completely full and no additional coolant can be
added, continue running the engine and install the radiator cap. Make sure
that the cap is completely seated by pressing down firmly while turning until
the cap stops. Once the cap is installed, the engine may be stopped.
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FIG. 8
COOLANT PLUG LOCATION
WARNING
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