29
HOW TO CHECK THE MUFFLER
Check the muffler every 50 hours. Make sure the muffler is
correctly mounted and is not loose. If the muffler is worn or
burnt, replace with a new muffler.
A worn muffler is a fire hazard and can also damage
the engine.
If you mount a spark arrester to the muffler, also check the
spark arrester when you check the muffler. If the spark
arrester is worn or damaged, replace it with a new spark
arrester.
See your nearest authorized service center for a spark
arrester.
INSPECT THE BLADE
WARNING:
Before you inspect or remove the blade,
disconnect the wire to the spark plug. If the blade hits an
object, stop the engine. Check the unit for damage.
The blade has sharp edges. When you hold the
blade, use gloves or cloth material to protect your
hands.
If you keep the blade sharp and inspect the blade for
damage, the blade will cut better and be more safe to
operate. Frequently check the blade for excessive wear,
cracks, or other damage.
Frequently check the nut that holds the blade.
Keep the nut tight. If the blade hits an object, stop the
engine.
Disconnect the wire to the spark plug. See if the blade is
bent or damaged. Check the blade adapter for
damage.
Before you operate the unit, replace damaged parts with
original equipment parts. See the authorized service
center in your area.
Every three years, have an authorized service person
inspect the blade or replace the old blade with an original
equipment part
HOW TO REMOVE AND INSTALL THE BLADE
1. Remove the mower housing. See the instructions on
“How To Remove The Mower Housing”.
2. Use a piece of wood to keep the blade from rotating.
3. Remove the nut that holds the blade (Illustration 13B).
4. Check the blade and the blade adapter according to
the instructions for “Inspect Blade”. Replace a badly
worn or damaged blade with an original equipment
blade. See an authorized service center in your area.
5. Clean the top and bottom of the mower housing.
Remove all the grass and debris.
6. Mount the blade and blade adapter on the mandrel
(Illustration13B).
7. Mount the blade so that the hi-lift edges are up. If the
blade is upside down, the blade will not cut orrectly
and can cause an accident.
8. Fasten the blade with the original washers and nut.
Make sure the outside rim of the Belleville washer is
against the blade (Illustration 13A).
WARNING:
Always keep the nut tight that holds the
blade. A loose nut or blade can cause an accident.
9. Tighten the nut that holds the blade to a torque of 35
foot pounds (47,5 N-m).
10. Install the mower housing. See “How To Install The
Mower Housing
HOW TO SHARPEN THE BLADE
WARNING:
Vibration can be caused if the blade is
not correctly balanced or if the blade is damaged. A
blade that is damaged with cracks can break and
cause an accident.
Keep a sharp edge on the blade. A blade that is not sharp
will cause the tips of the grass to become brown.
1. Sharpen the blade two times a year or every 25
hours.
2. Remove the blade according to the instructions in
“How To Remove And Install The Blade”.
3. Clean the blade with a brush, soap and water. Check
the blade. Look for cracks, nicks, or other damage.
Replace a badly worn or damaged blade with an
original equipment blade. See an authorized service
center in your area.
4. Sharpen the blade with a file (Illustration 13 C). Make
sure you keep the original bevel angle.
5. Make sure the blade is balanced. Use a screwdriver
and hold the blade parallel to the ground (Illustration
13 C).
A blade that is balanced will stay parallel to the
ground. If the blade is not balanced, the heavy end
will rotate toward the ground. Sharpen the heavy end
until the blade is balanced.
6. A new blade will cut better than a badly worn blade.
Every three years, have an authorized service person
inspect the blade or replace the old blade with an
original equipment blade.
7. Assemble the blade according to the instructions
“How To Remove And Install The Blade”.
How to check the blade rotation control
WARNING:
To prevent an injury, the blade rotation
control must operate correctly.
In normal usage, the blade rotation control
will not require
an adjustment. However, if the cutting performance
decreases or the quality of cut is poor, make the following
changes.
When you mow, make sure the throttle control in in the
FAST position.
1. Move the blade rotation control to the DISENGAGE
position (Illustration 14).
2. Stop the engine. Disconnect the wire from the spark
plug.
3. Check the blade(s). Keep a sharp edge on the
blade(s). A blade that is not sharp will cause the tips
of the grass to become brown.
4. If the quality of cut has not improved, replace the
mower drive belt. See “How To Replace The Mower
Drive Belt”. If replacing the belt does not correct the
problem, take the unit to an authorized service center.
5. Move the blade rotation control to the DISENGAGE
position. Stop the engine. Disconnect the wire from
the spark plug.
6. Check the operation of the blade brake. Rotate the
pulley with your hand. Make sure the brake pad is
pressed tightly against the pulley (Illustration 16).
Summary of Contents for 7600E
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