Exmark Lazer Z Operator's Manual page 32

5.1.21 Check spark plugs:
Service Interval: 160 hrs.
a) Remove spark plugs, check condition and reset gaps, or replace with
new plugs. See Engine Owners Manual.
5.1.22 Change fuel filter:
Service Interval: As Required
a) A fuel filter is installed between the fuel tanks and the engine. Replace
when necessary.
Fuel System Under Pressure. The Kohler 26 HP EFI has
a fuel system which operates under high pressure, and
the fuel filter and fuel line used must be approved
system components only. Use of substitute parts can
result in system failure, gasoline leakage and possible
explosion
Note: Use only high pressure clamps and SAE R7 or R9 hose available
from Exmark or Kohler. Clamps require special pliers P/N 643394 (Oetiker
P/N 14100118 or Kohler P/N 2445505) for installation..
Kohler 26 HP EFI
Kohler Air-cooled (except 26 HP EFI) Kohler P/N 2405002
Kawasaki Liquid-cooled
Note: When replacing the fuel filter for the Kohler 26 HP EFI units, wet the
interior of the new filter with gasoline before installation to prevent the high
pressure pump from tearing the filter.
5.1.23 Change hydraulic system filter:
NOTE: Use only Exmark Part No. 513211 for Summer use above 32 F or
Part No. 523541 for Winter use below 32 F.
a) Stop engine and remove key.
b) Raise seat.
c) Carefully clean area around filter. It is important that no dirt or
contamination enter hydraulic system.
d) Unscrew filter to remove and allow oil to drain from reservoir.
IMPORTANT : Before reinstalling new filter, fill it with Mobil 1 15W-50
and apply a thin coat of oil on the surface of the rubber seal.
Turn filter clockwise until rubber seal contacts the filter adapter, then
tighten the filter an additional 2/3 to 3/4 turn.
e) Fill reservoir as stated in Section 5.1.11.
f) Raise the rear of machine up and support with jack stands (or equivalent
support) just high enough to allow drive wheels to turn freely.
g) Start engine and move throttle control ahead to full throttle position. Move
the speed control levers to the full speed and run for several minutes.
Shut down machine and recheck oil level.
WARNING
Replacement Filters
Service Interval: After First 250 hrs.
Then yearly thereafter
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Exmark P/N 99-9403 (low pressure)
Kohler P/N 2405005 (high pressure)
Kawasaki P/N 49019-1055