Extraordinary Maintenance; Diagnostics - GGP SBC 425 H Operator's Manual

guard (2) by unscrewing the screws (3).
– F ix the line cutting knife in a vice and sharpen
it using a flat file, being careful to retain the
original cutting angle.
– R efit the knife on the guard.
5.11 LONG PERIODS OF DISUSE
IMPORTANT If you are not going to use the ma-
chine for a period of more than 2-3 months, we
recommend you do a few things before putting it
away. This will make it easier when you want to
use the machine again and will also prevent per-
manent damage to the engine.
Before putting the machine away:
– E mpty the fuel tank.
– S tart the engine and run it idle until it comes to
a halt, so that it uses up all the fuel that is left
in the carburettor.
– W ait for the engine to cool down before stor-
ing the machine.
When you wish to start using the machine again,
prepare it as indicated in chapter "2. Preparing
to work".

6. EXTRAORDINARY MAINTENANCE

This work must be done exclusively by your
Dealer.
All and any operations performed in unauthor-
ised centres or by unqualified persons will totally
invalidate the warranty.
6.1 TUNING MINIMUM SPEED
WARNING! If the cutting device moves
when the engine is running idle, contact your
Dealer to correctly regulate the engine.
6.2 CARBURETTOR ADJUSTMENTS
The carburettor is tuned by the manufacturer to
achieve maximum performance in all situations,
with a minimum emission of toxic gas in compli-
ance with the regulations in force.
In the case of poor performance contact your
Dealer for a check of the carburation and engine.

7. DIAGNOSTICS

What to do when ...
Source of problem
1. The engine will not start or will not keep running
Incorrect starting
procedure
Dirty spark plug
or incorrect distance
between the electrodes
Air filter clogged
Carburation problems
2. The engine starts but is lacking in power
Air filter clogged
Carburation problems
3. The engine runs irregularly
and lacks in power when revved
Dirty spark plug
or incorrect distance
between the electrodes
Carburation problems
4. The engine makes too much smoke
Carburation problems
5. The cutting device must not move
when the engine is running idle
Incorrect carburation
regulation
20
Corrective action
Follow the instructions
(see chapter 3)
Check the spark plug
(see chapter 5)
Clean and/or replace
the filter (see chapter 5)
Contact your Dealer
Clean and/or replace
the filter (see chapter 5)
Contact your Dealer
Check the spark plug
(see chapter 5)
Contact your Dealer
Contact your Dealer
Contact your Dealer