Bolens 247.77763 - Manual (Page 14)

• Stop engine and wait several minutes before
checking oil level. With engine on level ground,
the oil must be to FULL mark on dipstick,
• Change engine oil after the first five hours of
operation, and every twenty-five hours
thereafter.
To Drain Oil
Drain oil while engine is warm. Follow the instructions
given below.
•
Remove oil drain plug from the left side of the
engine and allow oil to run out into a suitable
container.
• When engine is drained of all oil, replace drain
plug securely.
• Refill with approximnately 20 oz. of fresh oil.
Refer to GAS AND OIL FILL-UP section.
• Replace dipstick.
Air Cleaner
The air cleaner prevents damaging dirt, dust, etc.,
from entering the carburetor and being forced into the
engine and is important to engine life and
performance. The air cleaner consists of a pre­
cleaner or foam filter, and a paper filter. See Figure
16. Never run the engine without air cleaner
completely assembled.
Wing
Nut
c. Wrap in a clean cloth and squeeze (do not
twist) until completely dry, or allow to air dry.
d. Saturate with engine oil and squeeze (don’t
twist) to distribute oil. Remove excess oil.
e. Replace pre-cleaner making sure that the
screen side is towards the paper element.
NOTE; If the pre-cleaner is torn or damaged in any
way, replace it.
• If necessary, replace paper filter (do not attempt
to clean). Install new filter on base.
• Slide pre-cleaner over filter.
• Install cover and wing nut.
• Tighten wing nut securely.
A
WARNING: Temperature of muffler and
nearby areas may exceed 150° F(65°C).
Avoid these areas.
Spark Plug
• Clean the spark plug and reset the gap to .030"
at least once a season or every 50 hours of
operation. See Figure 17. Spark plug
replacement is recommended at the start of
each season. Refer to engine parts list for
correct spark plug type.
NOTE: Do not sandblast spark plug. Sparkplug
should be cleaned by scraping or wire brushing and
washing with a commercial solvent.
Figure 17
To Service Air Cleaner:
1. Service pre-cleaner after every 25 hours of use,
or at least once a season.
2. Service filter every 100 hours of use, or at least
once a season.
3. Service pre-cleaner and filter more often under
dusty conditions.
• Remove wing nut and cover. See Figure 16.
• Slide pre-cleaner off filter. Clean the inside of
base and cover thoroughly.
• Clean pre-cleaner as follows;
a. Wash in water and detergent solution, and
squeeze (do nottwist) until all dirt is removed.
b. Rinse thoroughly in clear water.
Servicing Muffler
• Inspect muffler periodically, and replace if
necessary.
• If your engine is equipped with a spark arrester
screen assembly, remove after every 50 hours
of use for cleaning and inspection. Replace if
damaged.
WARNING: Do not operate the chipper-
shredder vacuum without a muffler or
tamper with the exhaust system. Damaged
mufflers or spark arresters could create a fire
hazard.
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