11
MAINTENANCE SCHEDULE
Perform these required maintenance procedures at the
frequency stated in the table. These procedures should also
be a part of any seasonal tune-up.
NOTE: Some maintenance procedures may require
special tools or skills. If you are unsure about
these procedures take your unit to any non-
road engine repair establishment, individual or
authorized service dealer.
NOTE: Maintenance, replacement, or repair of the emis-
sion control devices and system may be per-
formed by any non-road engine repair establish-
ment, individual or authorized service dealer.
In order to assure peak performance of your engine,
inspection of the engine exhaust port may be necessary after
50 hours of operation. If you notice lost RPM, poor
performance or general lack of acceleration, this service may
be required. If you feel your engine is in need of this
inspection, refer service to any non-road engine repair
establishment, individual or authorized service dealer for
repair. DO NOT attempt to perform this process yourself as
engine damage may result from contaminants involved in
the cleaning process for the port.
FREQUENCY
MAINTENANCE REQUIRED
REFER TO
Before starting engine
Fill fuel tank with fresh fuel
Page 8
Every 10 hours
Clean and re-oil air filter
Page 13
Every 25 hours
Check and clean spark arrestor
Check spark plug condition and gap
Page 14
Page 15
Every 50 hours
Inspect exhaust port and spark arrestor screen for clogging or
obstruction to assure maximum performance levels
Page 14
WARNING: To prevent serious injury, never per-
form maintenance or repairs with unit running.
Always service and repair a cool unit. Disconnect
the spark plug wire to ensure that the unit can-
not start.
Indexing Teeth
MAINTENANCE & REPAIR INSTRUCTIONS
Fig. 14
LINE INSTALLATION
This section covers both SplitLine™ and standard single line
installation.
Always use Genuine Factory Parts™ 0.080 in. (2.03 mm)
replacement line. Using line other than the specified may
make the engine overheat or fail.
There are two methods to replace the trimming line:
• Wind the inner reel with new line
• Install a prewound inner reel
Winding the Existing Inner Reel
1.
Hold the outer spool with one hand and unscrew the
bump knob counterclockwise (Fig. 12). Inspect the bolt
inside the bump knob to make sure it moves freely.
Replace the bump knob if damaged.
Bump Knob
Bolt
WARNING: Never use metal-reinforced line,
wire, chain or rope. These can break off and
become dangerous projectiles.
Fig. 12
Inner Reel
Spring
Outer Spool
Fig. 13
2.
Remove the inner reel from the outer spool (Fig. 13).
3.
Remove spring from the inner reel (Fig. 13).
4.
Use a clean cloth to clean the inner reel, spring, shaft, and
inner surface of the outer spool.
5.
Check the indexing teeth on the inner reel and outer
spool for wear (Fig. 14). If necessary, remove burrs or
replace the reel and spool.
Summary of Contents for BL150
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