Warning – Exmark NAV27KC User Manual
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5. MAINTENANCE & ADJUSTMENTS
WARNING
POTENTIAL HAZARD 
♦ While maintenance or adjustments are being made, 
someone could start the engine.
WHAT CAN HAPPEN 
♦ Accidental starting of the engine could seriously injure 
you or other bystanders.
HOW TO AVOID THE HAZARD 
♦ Remove the key from the ignition switch and pull the 
wire(s) off the spark plug(s) before you do any 
maintenance. Also push the wire(s) aside so it does 
not accidentally contact the spark plug(s). 
WARNING
POTENTIAL HAZARD 
♦ The engine can become very hot. 
WHAT CAN HAPPEN 
♦ Touching a hot engine can cause severe burns. 
HOW TO AVOID THE HAZARD 
♦ Allow the engine to cool completely before service or 
making repairs around the engine area.
5.1 PERIODIC MAINTENANCE
5.1.1
Check engine oil level:
Service Interval: Daily
a) Stop engine and wait for all moving parts to stop. Make sure unit is on a
level surface.
b) Check with engine cold.
c)
Raise
hopper.
d) Clean area around dipstick. Remove dipstick and wipe oil off. Reinsert the
dipstick and push it all the way down into the tube. Remove the dipstick 
and read the oil level. 
e) If the oil level is low, wipe off the area around the oil fill cap, remove cap
and fill to the “FULL” mark on the dipstick. Use oil as specified in Engine 
Owner’s Manual.  DO NOT 
overfill.
IMPORTANT: DO NOT operate the engine with the oil level below the 
“LOW” (or “ADD”) mark on the dipstick, or over the “FULL” mark. 
5.1.2
Check battery charge:
Service Interval: Monthly
Allowing batteries to stand for an extended period of time without recharging 
them will result in reduced performance and service life. To preserve optimum 
battery performance and life, recharge batteries in storage when the open 
circuit voltage drops to 12.4 volts. 
Note: To prevent damage due to freezing, battery should be fully charged 
before putting away for winter storage. 
