User Manual
9
2019101
1
v2
3. Wedge a block of wood between the blade disc and
mower deck to prevent the blade disc from turning.
4. Using a socket (not provided), loosen the disc bolt
by turning the bolt in a counterclockwise direction as
viewed from the bottom of the mower.
5.
Remove the disc bolt, lock washer, flat washer, ellipse
washer, and blade disc.
NOTE:
If any of the individual blades are dull, damaged,
or need replacing, they should be replaced using only
original equipment parts. If any single blade needs to
be replaced, then the complete set of four (4) blades
need to be replaced. Failure to replace the blades as a
set may result in an out of balance situation resulting in
damage to the engine.
6. Loosen the blade lock nuts on the old blades by turning
them counterclockwise.
7. Remove the blade lock nuts, washers, blades, wave
washers, and bolts from the blade disc.
8. Reassemble the new blades as shown in the
accompanying figure sheet. Ensure that the new blades
raised edges face towards the inside of the mower
deck once the disc is reinstalled to the mower. If the
blades are not assembled correctly, the grass will not
get directed to the rear of the deck (to be caught in the
catcher). Ensure that the wave washer is positioned
between the blade and the disc. Ensure that the lock
nuts are tightened (clockwise) over the flat washer and
disc, properly securing the blade to the disc.
NOTE:
When attaching the blades on the blade disc,
tighten the blade bolt until it is securely fastened (the
nut should not move when the blade is moved). The
nut should then be tightened 1/6 of a turn (one flat).
Replace the blades as a complete set of four (4) to
maintain balance.
9.
Assemble the blade disc, flat washer, lock washer,
and disc bolt on the shaft. Finger tighten the disc bolt
by turning in a clockwise direction as viewed from the
bottom of the mower.
10. Torque the disc bolt using a torque wrench (not
provided) to ensure that the bolt is properly tightened.
The recommended torque for the disc bolt and blade
lock nut is 35–45 Nm (26–33 ft. lb.). After bolt is finger
tight, it should be tightened a further 1¾ turns.
NOTE:
When securing blade disc, tighten the disc bolt
until the lock washer is completely flattened.
NOTE:
Do not sharpen the blades, replace with new
item. Blades need to be properly balanced to avoid
damage and personal injury.
NOTE:
Ensure that all parts are replaced in the exact
order in which they were removed.
CLEANING THE AIR FILTER
See Fig. 14.
The product has a paper air filter, and it cannot be washed.
1.
Remove the air filter element cover by pushing the latch
with your thumb while gently pulling the cover.
2.
Remove the paper air filter element for inspection.
3.
After removing the air filter element, most debris can be
removed by tapping it gently against a hard surface, or
brushing the surface lightly.
NOTE:
A dirty air filter element restricts air flow and may
result in damage to the engine. The life span of the air
filter element depends upon the environment in which
the product is used, and it should be inspected and
cleaned regularly and replaced when dirty. Replacement
air filter elements can be ordered through the Bunnings
special orders desk. The RYOBI part number for
Australia and New Zealand is 17150Z0301100000.
4.
Reinstall the cleaned or new air filter element into the
air filter base.
5.
Replace and secure the cover of the air filter element.
NOTE:
The air filter element should be replaced
annually for best performance or sooner, if necessary.
FUEL CAP
WARNING
A leaking fuel cap is a fire hazard and must be replaced
immediately.
The fuel cap contains a sealing gasket and a check valve
to allow air in.
A clogged fuel cap will cause poor engine performance.
If performance improves when the fuel cap is loosened,
check valve may be faulty or clogged. Replace fuel cap if
required.
When refitting the fuel cap, ensure that it is not cross-
threaded; otherwise it will leak.
CHANGING THE ENGINE OIL
See Fig. 15.
1. Stop the product. Make sure that all moving parts have
come to a complete stop. Allow the product to cool
down. Disconnect the spark plug wire.
2. Ensure that the fuel tank is completely empty before
tipping the unit over; otherwise, fuel will leak out.
3. Engine oil should be changed after every 20 hours of
use. Change the oil while the engine oil is still warm,
but not hot. This allows the oil to drain quickly and
completely.
4.
Remove the oil fill cap/dipstick.
5. Tip the mower onto its side, and allow the oil to drain
from the oil fill hole into an approved container.
6.
Place mower upright and refill with oil following the
instructions in the “Adding/Checking Oil” section.
7.
NOTE:
Dispose of used oil at an approved disposal
site. See your local oil retailer for more information.
SPARK PLUG MAINTENANCE
See Fig. 13.
The spark plug must be properly gapped and free of
deposits in order to ensure proper engine operation. To
check:
1. Stop the product. Make sure that all moving parts have
come to a complete stop. Allow the product to cool
down.
2. Remove the spark plug boot.
