To Examine And Replace The Spark Plug; To Replace A Fuse; To Charge The Battery; To Do An Emergency Start Of The Engine - Husqvarna R 418Ts AWD Manual De Usuario

10. Put the air filter cartridge back.
11. Attach the air filter cover and tighten the knobs.

To examine and replace the spark plug

1. Open the engine cover.
2. Remove the ignition cable shoe and clean around
the spark plug.
3. Remove the spark plug with a ¾ʺ (19 mm) spark
plug wrench.
4. Examine the spark plug. Replace it if the electrodes
are burned or if the insulation has cracks or
damages. If the spark plug is not damaged, clean it
with a steel brush.
5. Measure the electrode gap and make sure that it is
Technical data on page 35 .
correct. See
6. Bend the side electrode to adjust the electrode gap.
7. Put the spark plug back in and turn it by hand until it
touches the spark plug seat.
8. Tighten the spark plug with the spark plug wrench
until the washer is compressed.
9. Tighten a used spark plug ⅛ of a turn more, and a
new spark plug ¼ turn more.
CAUTION: Spark plugs that are not
tightened correctly can cause damage to
the engine.
10. Replace the ignition cable shoe.
CAUTION: Do not try to start the engine
if the spark plug or ignition cable is
removed.

To replace a fuse

A broken fuse is identified by a burned connector.
1. Remove the cover to get access to the broken fuse.
522 - 002 -
a) To replace the main fuse, remove the engine
cover. The main fuse is in a holder below the
battery.
b) To replace the fuse for the power outlet, remove
the side cover. The fuse for the power outlet is
below the control panel.
2. Pull the fuse from the holder.
3. Replace the broken fuse with a new fuse of the
same type, see Technical data on page 35 .
4. Replace the covers.
Note: If the main fuse breaks again a short period after
you replace it, there is a short circuit. Repair the short
circuit before you operate the product again. Let an
approved service agent help you.

To charge the battery

• Charge the battery if it is too weak to start the
engine.
• Use a standard battery charger.
CAUTION: Do not use a boost charger
or start booster. That will cause damage
to the electrical system of the product.
• Always disconnect the charger before starting the
engine.

To do an emergency start of the engine

If the battery is too weak to start the engine, you can use
jumper cables to do an emergency start. This product
has a 12 V system with negative ground. The product
that is used for the emergency start must also have a 12
V system with negative ground.
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