Information About The Spark Plug; Carburettor Adjustment - AL-KO solo 137 Mode D'emploi

Maintenance instructions

7.5 Information about the spark plug

Check the spark plug regularly after 50 hours of
operation.
• Press the back tab of the spark plug cover (16)
down and remove in an upwards motion.
• Disconnect the spark plug cap.
• Unscrew the spark plug and dry the electrodes.
The spark plug should be replaced after 100 hours
of operation or if the electrodes are badly worn.
Do not turn the engine over while the spark plug
has been removed or the spark plug cap has been
disconnected from the high-tension ignition cable.
A spark may cause a fire!
Spark plugs with resistor (thermal value 200) are
available in different brands under the following
description:
BOSCH WSR6F
CHAMPION RCJ-6Y or comparable.
The correct electrode gap is 0.5 mm.
Only use spark plugs, where the contact nut has
been firmly fitted. Loose connectors may produce
sparks, which can cause a fire. Before restarting
the engine, check the high-tension ignition cable
for any damage to its insulation and ensure the
cable is connected securely to the plug cap
• Insert the spark plug into the cylinder head and
tighten it.
• Push the spark plug cap firmly over the spark
plug.
• Position the spark plug cover onto the housing
by aligning it with the guiding pins, push down
and click into place.
ENGLISH 07

7.6 Carburettor adjustment

The carburettor has been adjusted optimally at the
factory. Subject to the operational altitude
(mountains or low lying areas), the carburettor may
require readjustment.
The carburettor has 3 adjusting screws:
• Idling end-stop screw "T"
• Low speed mixture screw "L"
• High speed mixture screw "H"
Only qualified mechanics must adjust the
regulating screws for idle mixture "L" and full load
mixture "H".
Turn the idling end-stop screw "T" to adjust the
idling speed in accordance with the details
provided in the specification. Use an engine rev
counter for this job.
•
If the idling speed is too high, turn the idling
end-stop screw "T" anti-clockwise.
•
If the idling speed is too low (engine stops) turn
the idling end-stop screw "T" clockwise until the
engine runs smoothly.
If the idling speed cannot be set correctly with the
idling end-stop screw "T", request an authorised
service centre.