MTD 420CC Operator's Manual
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Brand: MTD
Category: Engine , Lawn Mower
Type: Operator's manual
Model: MTD 277cc , MTD 357cc , MTD 420cc
Pages: 44
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Checking and Changing the Oil
To avoid engine damage, it is important to:
Check oil level before each use and every 5 operating hours
when the engine is warm.
Change the oil after the first 5 operating hours and every
50 operating hours thereafter. Engine should still be warm
but NOT hot from recent use.
Oil Fill Cap and Dipstick
drain oil, drain fuel from tank by running engine
until fuel tank is empty.
Carefully disconnect the spark plug wire and keep it away 1.
from the spark plug. Refer to Fig. 6-2 for spark plug location.
Keep the disconnected spark plug wire securely
away from the metal parts where arcing could
occur.
Carefully attach the spark plug wire to the
grounding post, if provided.
2.
3.
(see the equipment Operator’s Manual instructions for
additional information).
Clean area around the oil drain plug. 4.
Place an approved recyclable oil container under the oil 5.
drain plug.
Remove the Oil drain plug. See Fig. 6-3.6.
Used motor oil may cause skin cancer if
repeatedly left in contact with the skin for prolonged
periods. Although this is unlikely unless you handle
used oil on a daily basis, it is still advisable to
thoroughly wash your hands with soap and water as
soon as possible after handling used oil.
Tip engine to position the oil flow, so it will drain from the 7.
lowest point on the engine.
Drain the oil into an approved recyclable oil container.8.
NOTE: Please dispose of used motor oil in a manner that is
compatible with the environment. We suggest you take it in a
sealed container to your local service station for reclamation.
Do not throw it in the trash or pour it on the ground.
Install the oil drain plug and tighten securely.
Clean area around the oil drain plug.10.
Remove the oil fill cap dipstick.11.
Fill with the recommended Oil. See Fig. 6-1.12.
NOTE: DO NOT overfill oil filler. Doing so may result in oil
carry-over to the equipment and cause malfunction or
damage.
NOTE: DO NOT allow oil level to fall below and “L” mark on
dipstick. Doing so may result in equipment malfunction or
damage.
Wipe away any spilled oil.13.
Check the oil level by installing the Oil Fill Cap/Dipstick. 14.
For threaded Oil Fill Cap/Dipstick models, rest
the cap on the threads, do not tighten down the
cap to check the oil level.
For quarter-turn Oil Fill Cap/Dipstick models,
tighten down the cap to check the oil level.
NOTE: See the Set-Up section earlier in this manual for
detailed instructions on identifying and checking the oil on
each of these specific engine models.
Remove the oil filler cap/dipstick. If the level is low, slowly 15.
Fig. 3-2 and 3-3 in the Set-Up section.
Repeat Steps 14 & 15 to be sure that the correct oil level has 16.
been achieved.
Once the proper oil level has been confirmed, install the Oil 17.
Fill Cap/Dipstick. Tighten securely.
Boot
Drain
14 se c t i O n 6— Ma i n t e n a n c e