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13
MAINTENANCE AND REPAIR INSTRUCTIONS
To prevent serious
injury, never perform
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.
WARNING:
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
emission control devices and system may be
performed by any non-road engine repair
establishment, individual or authorized service dealer.
FREQUENCY MAINTENANCE REQUIRED REFER TO
Before starting engine
Fill fuel tank with fresh fuel
Check oil
Page 12
Page 21
Every 10 hours Clean and re-oil air filter Page 22
First change at 10 hours
Every 25 hours thereafter
Every 25 hours
Change oil
Change oil
Clean spark arrestor
Page 22
Page 22
Page 26
10 hours on new engine
Every 25 hours
Every 25 hours
Check rocker arm to valve clearance and adjust
Check rocker arm to valve clearance and adjust
Check spark plug condition and gap
Page 24
Page 24
Page 26
LINE INSTALLATION
Always use original equipment manufacturer 0.095 inch
(2.41 mm) replacement line. Lines other than those
specified may make the engine overheat or fail.
There are two methods to replace the SpeedSpool
®
trimming line:
• Wind the inner reel with new line
• Install a pre-wound inner reel
Winding the Inner Reel With New Line
NOTE: It Is unnecessary to remove the bump knob to
install a new trimming line.
1. Cut two pieces of 0.095 inch (2.41 mm) trimming
line, 10 feet (3 m) long.
2. Hold the outer spool and turn the inner reel
counterclockwise to line up the arrows on the outer
spool and inner reel (Fig. 41).
SPEEDSPOOL
®
(TB425CS & TB475SS)
Never use metal-
reinforced line, wire,
chain or rope. These can break off and
become dangerous projectiles.
WARNING:
Always use the
correct line length
when installing trimming line on the unit.
The line may not release properly if the line
is too long.
WARNING:
Top View Of The SpeedSpool
®
Outer Spool
Inner Reel
Fig. 41
Bump Knob
Arrows
3. Pull old line out of the line loading and line locking
holes (Fig. 42 and 43).
4. Insert a piece of trimming line straight into one of the
two eyelets in the outer spool. Push it up through the
line loading hole in the inner reel (Fig. 42). Do not
bend the line when inserting it into the eyelet.