Replacing The Air Filter; Changing The Engine Oil - Lawn-Boy 10666C Operator's Manual

Replacing the Air Filter

Service Interval: Every 25 hours
Replace the air filter yearly; replace it more frequently
in dusty operating conditions. Refer to Preparing for
Maintenance.
1. Use a screw driver to open the air filter cover
(Figure 39).
2. Replace the air filter (Figure 40).
3. Install the cover.

Changing the Engine Oil

Service Interval: After the first 5 hours
Yearly
Run the engine a few minutes before changing the oil
to warm it. Warm oil flows better and carries more
contaminants.
1. Perform the pre-maintenance procedures; refer to
Preparing for Maintenance.
2. Remove the dipstick (Figure 41).
Figure 39
Figure 40
3. Tip the mower onto its side, with the air filter up,
to drain the used oil out through the oil fill tube
(Figure 42).
4. Slowly pour oil into the oil fill tube until the oil level
reaches the Full line on the dipstick (Figure 43).
Do not overfill. (Max. fill: 20 oz., type: SAE 30
detergent oil with an API service classification of SF,
SG, SH, SJ, SL, or higher.)
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Figure 41
Figure 42