V 4.0
Engine for 20 in. 4-in-1 Self-Propelled Lawn Mower
8925521
Visit www.princessauto.com for more information
7
4. Replacement parts must match the original. Use manufacturer
recommended parts when possible.
5. Disconnect the spark plug lead and keep it away from the spark plug
during maintenance and repairs.
6. Maintain the engine’s label and name plate. These carry important
information. If unreadable or missing, contact Princess Auto Ltd. for
replacements.
IMPORTANT! Only qualified service personnel should repair the engine.
MAINTENANCE SCHEDULE
This schedule applies to normal operating conditions. If you operate your engine
under severe conditions, such as sustained high-load or high-temperature
operation or use in unusually wet or dusty conditions, consult a qualified technician
for recommendations applicable to your individual needs and use.
Regular Service Period*
Bef
or
e E
ach
U
se/
D
ai
ly
Fi
rs
t M
ont
h o
r
20 H
our
s
Ev
er
y 3 m
ont
hs
or
50 H
our
s
Ev
er
y 6 m
ont
hs
or
100 H
our
s
Ever
y Y
ear
o
r
30
0 H
our
s
Performed at every indicated month or
operating hour interval, whichever
comes first.
Engine Oil
Check
X
Change
X
X
Air Cleaner
Check
X
Clean
X **
Sediment Cup
Clean
X
Spark Plug
Clean / Adjust
X
Replace
X
Idle Speed
Check / Adjust
X
Valve Clearance
Check / Adjust
X
Combustion Chamber Clean
After every 500 Hours
Fuel Tank and Filter
Clean
X
Fuel Tube
Check
Every 2 years (replace if necessary)
*
For commercial use, log hours of operation to determine proper maintenance
intervals.
** Service more frequently when used in dusty areas.