R21 Maintenance
35
Check Engine Crankcase Oil
Frequency: Each use or after 8 hours of continu-
ous operation
The engine is serviced with 10W-30, Service
Class SJ oil from the factory. Change the oil after
the initial engine break-in period of 5 hours.
Thereafter, change oil after every 100 hours of
operation. See “Change Engine Crankcase Oil
and Filter” on page 44 for details.
IMPORTANT: The importance of checking and
maintaining the proper crankcase oil level cannot
be overemphasized. Check the oil level BEFORE
EACH USE.
1. Park the mower on a level surface with the
en gine stopped. Also, make sure the engine
is cool and oil has had time to drain into the
sump [allow at least ve (5) minutes after
stopping the engine].
IMPORTANT: NEVER check or add oil with
the engine running.
2. Before removing the dipstick, clean the area
around the dipstick to keep any dirt or debris
out of the engine.
Oil Dipstick
Oil Dipstick Location
3. Remove the dipstick, wipe off with a clean rag,
then reinsert the dipstick into the tube and
push it all the way down.
4. Remove the dipstick again and check the oil
lev el on the dipstick. The oil level should be
within the “Operating Range” on the dipstick
(between the “L” mark and the “F” mark).
IMPORTANT: DO NOT operate engine with-
out a sufcient oil supply in the crankcase.
DO NOT operate with the oil level below the
“L” mark or above the “F” mark on the dipstick.
5. If additional oil is needed, refer to “Specica-
tions” on page 4 for proper crankcase
lubricant. Fill up to, but not above, the “F”
mark on the dipstick.
IMPORTANT: DO NOT overll the crankcase
(oil above “F” mark) as this CAN result in en-
gine overheating, loss of power, and possible
en gine damage.
Full Mark
Low Mark
Operating
Range
}
Dipstick Operating Range
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