Gravely 911530 - Pro 21 SCH - Manual (Page 16)

GB - 16
REPLACE OIL FILTER
Replace oil filter every 100 hours of use or
every season.
1. Change engine oil.
2. Clean around filter.
3. Turn filter counterclockwise to remove.
4. Apply a thin coat of oil onto seal of new
filter.
5. Install new filter and hand tighten
securely.
CHECK SPARK PLUG
Spark plug should be replaced every 100
hours of operation or each year.
NOTE: Loose spark plug wire terminals can
cause sparking. Replace terminal if damaged.
CHECK ENGINE COOLING
To prevent overheating, air must circulate
freely around the cooling fins, cylinder head
and block.
Every 100 hours of operation or yearly (more
often if conditions require) remove blower
housing and clean cooling fins. See engine
manual for instructions.
CHECK MUFFLER
Check muffler for debris, cracks, wear, or other
damage.
SERVICE POSITION
Put unit into service position for easy access
to underneath the deck.
1. Place unit on a flat, level surface.
2. Disconnect spark plug wire.
3. Remove fuel cap, place a piece of plastic
bag over the opening and tighten cap
securely.
4. Tip unit onto left side, opposite the
discharge opening.
Make sure unit is secure and will not tip
over.
IMPORTANT: Remove plastic from fuel cap
after unit is upright and service is complete.
HANDLEBAR HEIGHT
To adjust (Figure 8):
1. Use the fasteners to attach one of the
holes at the top and one of the holes at
the bottom.
NOTE: To fold handlebars flat for storage, pull
the speed control rod (if equipped) all the way
back, disconnect braces from support bracket,
and fold handlebar forward. Do Not bend
speed control rod.
WARNING: HOT SURFACES can
cause death or serious injury. DO
NOT TOUCH parts which are hot
from operation. ALWAYS allow parts
to cool.
CAUTION: Replace worn-out
mufflers immediately. Continued use
could result in fire or explosion.
SERVICE AND ADJUSTMENTS
CAUTION: AVOID INJURY. Read
and understand the entire Safety
section before proceeding.
CAUTION: Avoid fuel spills. Follow
steps below to help prevent fuel
spills. If fuel leaks into air cleaner,
replace air cleaner. ALWAYS clean
up any spilled fuel.