Yard Machines Y780, Operator'S Manual

Page: 13 / 56

13
REPLACING THE SPARK PLUG
Use a Champion RDJ7Y spark plug, or equivalent. The correct
air gap is
0.5 mm (0.020 in.) . Remove the plug after every 25
hours of operation and check its condition.
1. Stop the engine and allow it to cool. Grasp the plug wire
firmly and pull it from the spark plug.
2. Clean around the spark plug. Remove the spark plug from
the cylinder head by turning a 5/8-inch socket
counterclockwise.
3. Replace a cracked, fouled
or dirty spark plug. Set the
air gap at
0.5 mm (0.020 in.)
using a feeler gauge (Fig.
37).
4. Install a correctly-gapped
spark plug in the cylinder
head. Tighten by turning the
5/8-inch socket clockwise
until snug.
If using a torque wrench torque
to:
12.3-13.5 N•m (110-120 in•lb)
Do not over tighten.
CLEANING
Use a small brush to clean off the outside of the unit. Do not
use strong detergents. Household cleaners that contain
aromatic oils such as pine and lemon, and solvents such as
kerosene, can damage plastic housing or handle. Wipe off any
moisture with a soft cloth.
MAINTENANCE AND REPAIR INSTRUCTIONS
STORAGE
• Never store a fueled unit where fumes may reach an open
flame or spark.
• Allow the engine to cool before storing.
• Store the unit locked up to prevent unauthorized use or
damage.
• Store the unit in a dry, well-ventilated area.
• Store the unit out of the reach of children.
LONG TERM STORAGE
If you plan on storing the unit for an extended time, use the
following storage procedure:
1. Drain all fuel from the gas tank into a container with the
same 2-cycle gas mixture. Do not use gas that has been
stored for more than 60 days. Dispose of the old gas/oil
mix in accordance to Federal, State and Local regulations.
2. Start the engine and allow it to run until it stalls. This
ensures that all gas has been drained from the carburetor.
3. Allow the engine to cool. Remove the spark plug and put
30 ml (1 oz) of any high quality motor oil or 2-cycle oil into
the cylinder. Pull the starter rope slowly to distribute the
oil. Reinstall the spark plug.
NOTE: Remove the spark plug and drain all of the oil
from the cylinder before attempting to start the
trimmer after storage.
4. Thoroughly clean the unit and inspect it for any loose or
damaged parts. Repair or replace damaged parts and
tighten loose screws, nuts or bolts. The unit is ready for
storage.
TRANSPORTING
• Allow the engine to cool before transporting.
• Drain fuel from unit.
• Tighten gas cap before transporting.
• Secure the unit while transporting.
0.020 in.
(0.5 mm.)
Fig. 37
CAUTION:
Do not sand blast, scrape or clean
electrodes. Grit in the engine could damage the
cylinder.
WARNING:
To avoid serious personal injury,
always turn your trimmer off and allow it to cool
before you clean or service it.