Muffler; Spark Plug; Air Filter; Blade - Husqvarna LC221Ai Operator's Manual

Muffler
If the muffler is corroded or is damaged in any other way,
it must be replaced because it may become a fire hazard
and/or cause injury.

Spark plug

CAUTION! Always use the recommended spark plug
type! Use of the wrong spark plug can damage the
piston/cylinder.
• Replace spark plug at the beginning of each mowing
season or after every 100 hours of operation,
whichever occurs first. Spark plug type and gap
setting are shown in the "Product specicication"
section of this manual.
Air filter
Your engine will not run properly and may be damaged by
using a dirty air filter. Replace the air filter cartridge every
100 hours of operation or every season, which ever
occurs first. Service air cleaner more often under dusty
conditions.
• Remove the air filter cover and take out the filter.
• Clean the filter by knocking the filter against a flat
surface. Never use solvent with petroleum, for
example, kerosene, or compressed air to clean the
filter.
• An air filter that has been in use for a long time cannot
be cleaned completely. The filter must therefore be
replaced with a new one at regular intervals. A
damaged air filter must always be replaced.
• When reassembling, make sure that the filter
completely seals against the filter holder.

Blade

WARNING! Always wear heavy-duty
!
gloves when servicing and maintaining
the blade. The blade is very sharp and
cuts can occur very easily.
Always stop the engine before doing any
work on the blade. This continues to
rotate even after the throttle has been
released. Ensure that the blade has
stopped completely and disconnect the
spark plug cap before you start to work
on it.
• Check the blade for cracks or any other damage. A
damaged blade must always be replaced.
• Always ensure the blade is well ground and balanced
correctly. To check blade balance, you will need a 5/8"
diameter steel bolt, pin, or a cone balancer. When
using a cone balancer, follow the instructions supplied
with balancer.
20 – English
MAINTENANCE
• Do not use a nail for balancing blade. The lobes of the
center hole may appear to be centered, but are not.
• Slide blade on to an unthreaded portion of the steel
bolt or pin and hold the bolt or pin parallel with the
ground. If blade is balanced, it should remain in a
horizontal position. If either end of the blade moves
downward, sharpen the heavy end until the blade is
balanced.
IMPORTANT! The blades should be balanced after
sharpening. We do not recommend sharpening blade.
Sharpening and balancing the blade should be
conducted by an authorized service workshop.
Damaged blades should be replaced immediately.
NEVER use a mower with a damaged blade.
Replacing the blades
1 Always disconnect the spark plug before performing
maintenance or service.
2 Always empty the fuel tank before you place the lawn
mower on its side. Empty the fuel tank by running the
machine until the tank is empty.
3 Turn lawn mower on its side. When the machine is
tilted, make sure the air filter always is placed in the
highest position.