Changing Blades; Sharpening The Blade - Mountfield M Series Owner's Manual

GB
Clean the spark plug regularly (every 100 hours of
run time). Use a wire brush for cleaning.
Change the spark plug if the electrodes are exces-
sively burnt or if the plug is damaged. The engine
manufacturers recommendations are as follows:
(fig. 22):
Briggs & Stratton: Champion J19LM (RJ19LM),
spark gap 0.76 mm.
Honda: NGK BPR6ES,
Spark gap 0.7-0.8 mm.
BATTERY (*)
The electrolyte in the battery is toxic
and corrosive. It can cause serious cor-
rosion damage etc. Avoid all contact
with skin, eyes and clothing.
In normal use during the season, the battery is
charged by the engine. If the engine cannot be
started with the ignition key, it may be because the
battery is 'dead'.
Dismantle the battery by opening the battery cov-
er, disconnecting the terminal on the engine and re-
moving the battery (fig. 23). Connect the battery
charger (provided) to the battery, then connect the
charger to a wall socket and charge for 24 hours
(fig. 24).
After charging, the battery may be reinstalled and
the terminal on the battery connected to the termi-
nal on the engine (fig. 25).
The battery charger may not be connected directly
to the engine terminal. It is not possible to start the
engine with the charger as the power source and
the charger could be damaged.
WINTER STORAGE
Remove the battery and store it fully charged (see
above) in a dry, cool place (between 0°C and
+15°C). The battery should be maintenance-
charged at least once during the winter storage pe-
riod.
Before the start of the season, the battery should be
charged once again for 24 hours.
ADJUSTING CLUTCH CABLE (*)
If the drive does not engage when the clutch loop
is pressed against the handle, or if the lawnmower
feels cumbersome or slow, this may be because the
clutch in the transmission is slipping. To rectify
this situation, adjust the clutch cable as follows:
12
ENGLISH
1. When the clutch loop is released, it should be
possible to push the mower without any resist-
ance. If this is not the case, screw in the nipple
T until the mower can be pushed (fig. 27).

CHANGING BLADES

Wear protective gloves when changing
blades to avoid cutting yourself.
Check the blade system regularly. Check
particularly the curved area behind the
blade edge for traces of wear. If the blade
shows traces of damage it should be re-
placed. A worn blade creates imbalance
and can damage the mower.
Always check the blade after a collision. First dis-
connect the spark plug cable. If the blade system
has been damaged, defective parts should be re-
placed. Always use genuine spare parts.
To replace the blade, slacken the screw (fig. 28).
Fit the new blade so that the stamped logo is turned
up facing the blade holder (not facing the grass).
Reinstall the washer and screw. Tighten the screw
properly. Tightening torque 40 Nm.
When replacing the blade, the blade screw should
also be replaced.
The guarantee does not cover damage to the blade,
blade holder or engine caused by running into ob-
stacles.
When replacing the blade, the blade holder and
blade screw, always use genuine spare parts. Non-
genuine spare parts can entail a risk of injury or
damage, even if they fit the machine.

SHARPENING THE BLADE

Sharpening of the blade must be done by wet meth-
od grinding, using a whetstone or a grindstone.
For safety reasons, the blades should not be sharp-
ened on an emery wheel. A very high temperature
could cause the blades to become brittle.
2. When the clutch loop is
pressed in approx. 2 cm (posi-
tion 1), there should be some
resistance when pushing the
lawnmower. With the clutch
loop fully pressed in (position
2) it should not be possible to
push the mower. Unscrew the
nipple T until this position is
achieved.