Troubleshooting - Husqvarna PG 400 Petrol Operator's Manual

CAUTION:
plug. Refer to
CAUTION:
plug has the correct distance and that it is
clean from deposits.
1. Disconnect the spark plug cap, and remove dirt from
the spark plug area.
2. Remove the spark plug with a 13/16 in./21mm spark
plug wrench.
Troubleshooting schedule
Problem
The product does not start.
The product is not easy to hold on to.
The product has sudden movements.
16
Always use a correct spark
Technical data on page 18 .
Make sure that the spark
A
B

Troubleshooting

Cause
The operator presence control is
not engaged.
There is no fuel in the fuel tank.
There is no oil in the oil tank.
Too small number of diamond
tools on grinding head.
The incorrect type of diamond
tools for the surface.
The diamond tools are not cor-
rectly installed.
The diamond tools have different
heights.
3. Examine the spark plug. Replace it if it is damaged,
if the electrode (A) is worn or if the sealing washer
(B) is in bad condition.
4. Measure the spark plug electrode gap with a feeler
gauge for wires. Make sure that the distance is
Technical data on page 18 .
correct. Refer to
5. If it is necessary, bend the side of side electrode
carefully to correct the distance.
6. Install the spark plug carefully, by hand.
7. Tighten the spark plug with a 13/16 in./21mm spark
plug wrench to compress the washer.
a) If you install a new spark plug, tighten ½ turn
after the spark plug seats to the compressed
washer.
b) If you install the same spark plug, tighten ⅛-
¼ turn after the spark plug is against the
compressed washer.
CAUTION:
can become too hot and cause
damage to the engine. If the spark
plug is too tight, it can cause damage
to the top of the cylinder.
8. Attach the spark plug cap to the spark plug.
Possible solutions
Hold the operator presence con-
trol against the handlebar when
you pull the starter rope handle.
Fill the fuel tank with fuel. Refer
to
Fill the oil tank with oil. Refer to
To do a check of the oil level on
page 14 .
Use the correct number of dia-
mond tools. Refer to
tools on page 10 .
Make sure that all diamond tools
are installed correctly.
Make sure that all diamond tools
have the same height.
A loose spark plug
To fill fuel on page 12 .
Diamond
883 - 004 - 20.12.2023