MAINTENANCE & REPAIR INSTRUCTIONS
MAINTENANCE SCHEDULE
Bolt
Perform these required maintenance procedures at the
frequency stated in the table. These procedures should also be
a part of any seasonal tune-up.
Bump Knob™
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: 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.
Fig. 15
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.
2.
3.
Remove the inner reel from the outer spool (Fig. 16).
Remove spring from the inner reel (Fig. 16).
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
Outer Spool
Spring
contaminants involved in the cleaning process for the port.
Inner Reel
FREQUENCY
MAINTENANCE REQUIRED
REFER
Before starting
Fill fuel tank with fresh fuel
Page 3
Fig. 16
Every 10 hours Clean and re-oil air filter
Page 11
4.
5.
Use a clean cloth to clean the the inner reel, spring, shaft,
and inner surface of the outer spool.
Check the indexing teeth on the inner reel and outer spool
for wear (Fig. 17). If necessary, remove burrs or replace the
reel and spool.
Check and clean spark arrestor Page 11
Every 25 hours Check spark plug condition
Page 12
and gap
Inspect exhaust port and spark
arrestor screen for clogging or
obstruction to assure
Every 50 hours
Page 11
Indexing Teeth
maximum performance levels
LINE INSTALLATION
This section covers both SplitLine™ and standard single line
installation.
Always use original equipment manufacturer 0.095 in. (2.41
mm) replacement line. Line other than the specified may make
the engine overheat or fail.
WARNING: Never use metal-reinforced line,
wire, chain or rope. These can break off and
become dangerous projectiles.
Fig. 17
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. 15). Inspect the bolt inside
the Bump Knob to make sure it moves freely. Replace the
Bump Knob if damaged.
9
| Categories | Lawn Mower Manual, MTD Lawn Mower Manuals, Yard Man Lawn Mower Manuals |
|---|---|
| Tags | MTD YM70SS, Yard Man YM70SS |
| Download File |
|
| Document Type | Owner's Manual |
| Language | English |
| Product Brand | MTD, Lawn Mower, YM70SS |
| Product Type | Walk Behind Mower |
| Document File Type | |
| Publisher | mtdproducts.com |
| Wikipedia's Page | MTD Products |
| Copyright | Attribution Non-commercial |
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