Maintaining Your Lawn Mower; Service - Yard-Man 559 Operator's Manual

21” self propelled mulching mower
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Adjusting Cutting Height
Refer to height adjustments section of this manual on
page 15 for instruction on how to adjust the cutting
height and the handle height.
For best results in mowing, keep the cutting height
position high until you can determine a suitable height.
Bagging Grass Clippings
You can use the grasscatcher bag to collect clippings
while you are operating the mower. Attach the
grasscatcher following instructions on page 8 of this
manual. The grass clippings will automatically collect in
the bag as you run the mower. Operate the mower till
the grass bag is full. Do NOT allow the bag to overfill
with grass clippings. Stop the engine completely by
releasing the control handle. Make sure that the unit
has come to a complete stop. To empty the grass bag
proceed as follows:
SECTION 6: MAINTAINING YOUR LAWN MOWER
WARNING:
disconnect the spark plug wire before
performing
any
adjustments on your lawn mower.
Cleaning Mower
The underside of the mower deck should be cleaned
after each use to prevent any build-up of grass
clippings, leaves, dirt, or other debris. If this debris is
allowed to accumulate, it will result in rust and
corrosion.
NOTE: We do not recommend the use of pressure
washers or garden hose to clean your unit. These may
cause damage to electric components, spindles,
pulleys, bearings, or the engine. The use of water will
result in shortened life and reduce serviceability.
Disconnect spark plug wire.
Drain the gasoline from the lawn mower, or place a
piece of plastic under the gas cap.
Tip the mower so that it rests on the housing. Keep
the side with the air cleaner facing UP. Hold the
mower firmly.
Scrape and clean the underside of the deck with a
suitable tool. Do NOT spray with water.
Put the mower back on its wheels on the ground. If
you had put plastic under the gas cap, make sure to
remove it now.
Always stop the engine and
maintenance
work
Pull bag up and away
Lift discharge door and pull grass bag up and away
from the mower to dispose of the grass clippings
See Figure 11.
WARNING:
90 degrees in any directions and do not leave
or
the mower tipped for any length of time. Oil
can drain into the upper part of the engine
causing a starting problem.
Engine Maintenance
A list of key maintenance jobs required for good
performance by the mower is given below. Follow
the accompanying engine manual for detailed list
and instructions.
Change engine oil regularly, as instructed in the
engine manual. Check oil level before starting
engine every time.
Service foam filter in the air cleaner every 25 hours
of use and replace the paper filter component every
100 hours. You may have to service the air filter
more frequently if you are operating the mower
under extremely dusty conditions.
Clean the engine periodically. Remove dirt and
debris with a cloth or brush.
Clean the spark plug and reset the gap to .030" at
least once a season. Refer to the engine manual for
correct spark plug type.
Inspect muffler periodically, and replace if
necessary. Damaged mufflers or spark arresters
can create a fire hazard. Make sure to avoid muffler
and surrounding areas while the mower engine is
hot because temperature of these areas of the
engine may exceed 150
11
Discharge
Door
Figure 11
Never tip the mower more than
F.
o

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