Ignition System; Check The Safety System; Main Fuse; Checking The Tyre Pressure - Husqvarna Rider 320 AWD Operator's Manual

Ignition system

The engine is equipped with an electronic ignition system.
Only the spark plug requires maintenance.
For recommended spark plug, see Technical data.
IMPORTANT INFORMATION
Fitting the wrong spark plug type can damage the engine.
Replacing the spark plug
1 Remove the ignition cable shoe and clean around the
spark plug.
2 Remove the spark plug with a 3/4" (19 mm) spark plug
socket wrench.
3 Check the spark plug. Replace the spark plug if the
electrodes are burned or if the insulation is cracked or
damaged. Clean the spark plug with a steel brush if it is to
be reused.
4 Measure the electrode gap with a gapping tool. The gap
should be 0.75 mm/0.030". Adjust as necessary by
bending the side electrode.
5 Reinsert the spark plug, turning by hand to avoid
damaging the threads.
6 Tighten the spark plug, once it touches the seating, with
the spark plug spanner. Tighten the spark plug so that the
washer is compressed. A used spark plug should be
turned 1/8 of a turn from the seated position. A new spark
plug should be turned a 1/4 turn from the seated position.
7 Replace the ignition cable shoe.
IMPORTANT INFORMATION
Inadequately tightened spark plugs can cause overheating
and damage the engine. Tightening the spark plug too
much can damage the threads in the cylinder head.
Do not turn over the engine if the spark plug or ignition cable
has been removed.

Check the safety system

The Rider is equipped with a safety system that requires the
following conditions.
The engine can only be started when:
• The cutting deck is raised and the parking brake is
applied.
The engine should stop when:
• The cutting deck is lowered and the driver rises from the
seat.
• The cutting deck is in its raised position, the parking brake
is not applied and the driver rises from the seat.
Check daily to ensure that the safety system works by
attempting to start the engine when one of the conditions
above is not met. Change the conditions and try again.

Main fuse

The main fuse is placed in a detachable holder under the
battery case's cover, in front of the battery.
Type: Flat pin, 15 A.
20 –
English
Maintenance
Do not use any other type of fuse when replacing.
A blown fuse is indicated by a burnt connector. Pull the fuse
from the holder when replacing.
The fuse is there to protect the electrical system. If it blows
again shortly after replacement, it is due to a short circuit,
which must be fixed before the machine can be put into
operation again.

Checking the tyre pressure

The tyre pressure should be 60 kPa (0.6 bar / 9 PSI) all round.
To improve driving the pressure on the rear tyres can be
reduced to 40 kPa (0.4 bar/5.6 PSI). The maximum tyre
pressure is 100 kPa (1,0 bar/14 PSI).
IMPORTANT INFORMATION
Different tyre pressures on the front tyres will result in the
blades cutting the grass at different heights. Having the
same air pressure in the tyres is important in order to
achieve the best possible performance as well as to avoid
damage to the machine
Checking the engine's cooling air
intake
Clean the air intake grille in the engine cover behind the
driver's seat.
Open the engine cover.
Check that the cooling intake is free from leaves, grass and
dirt.
Check the air duct, located on the inside of the engine cover,
ensure it is clean and does not rub against the cooling air
intake.
A blocked cooling intake will interfere with the cooling of the
engine, which can damage the engine.
!
WARNING! The cooling air intake rotates
when the engine is running. Mind your
fingers.