Maintenance Schedule; Line Installation; Maintenance And Repair Instructions; Winding The Existing Inner Reel - Troy-Bilt TB90BC Operator's Manual

MAINTENANCE AND REPAIR INSTRUCTIONS

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.
WARNING:
maintenance or repairs with unit running.
Always service and repair a cool unit.
Disconnect the spark plug wire to ensure that
the unit cannot start.
FREQUENCY
Before starting engine
Every 10 hours
Every 25 hours
Every 50 hours

LINE INSTALLATION

This section covers both SplitLine™ and standard single
line installation.
Always use original equipment manufacturer 0.105 in.
(2.67 mm) replacement line. Other types of line may
make the engine overheat or fail.
WARNING:
chain or rope. These can break off and
become dangerous projectiles.
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 clockwise (Fig. 27). Inspect the bolt inside
the bump knob to make sure it moves freely. Replace
the bump knob if damaged.
Outer Spool
Spring
Inner Reel
Bump Knob
16
To prevent serious
injury, never perform
MAINTENANCE REQUIRED
Fill fuel tank with fresh fuel
Clean and re-oil air filter
Check and clean spark arrestor
Check spark plug condition and gap
Inspect exhaust port and spark arrestor screen for clogging or
obstruction to assure maximum performance levels
Never use metal-
reinforced line, wire,
Bolt
Fig. 27
NOTE: Maintenance, replacement, or repair of the
emission control devices and system may be
performed by any non-road engine repair
establishment, 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.
2. Remove the inner reel from the outer spool (Fig. 27).
3. Remove spring from the inner reel (Fig. 27).
4. Use a clean cloth to clean the the inner reel, spring,
shaft and inner surface of the outer spool (Fig. 28).
5. Check the indexing teeth on the inner reel and outer
spool for wear (Fig. 29). If necessary, remove burrs or
replace the reel and spool.
Indexing Teeth
REFER TO
Page 11
Page 18
Page 19
Page 21
Page 19
Fig. 28
Fig. 29