MTD MP426CS - Manual (Page 12)

12
SECTION 7: MAINTENANCE AND REPAIR INSTRUCTIONS
WARNING: 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.
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 9
Page 14
Every 10 hours Clean and re-oil air filter Page 16
First change at 10 hours
Every 25 hours thereafter
Every 25 hours Change oil
Change oil
Clean spark arrestor Page 15
Page 15
Page 19
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 17
Page 17
Page 19
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:
Line Installation for the Speedspool ®
Always use original equipment manufacturer 0.080 inch
(2.03 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. 15).
Top View Of The SpeedSpool ®
Outer Spool
Inner Reel
Fig. 15
Bump Knob
Arrows
Never use metal-
reinforced line, wire,
chain or rope. These can break off and
become dangerous projectiles.
WARNING: