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13. MAINTENANCE – 2-STROKE MOTOR UNIT
Regular maintenance tasks must be carried out at
specific intervals to retain the engine's performance.
13.1 CLEANING THE AIR FILTER (FIG.15)
A dirty, clogged air filter will restrict the air flow in
to the engine and will cause rough running. It will
increase fuel consumption and may result in starting
problems.
Attention
Stop the engine before removing the air
filter assembly.
– Set the choke lever
to the closed position to
prevent any debris entering the carburettor inlet.
– Turn screw
anticlockwise to remove it.
– Lift cover
away at the bottom, then lift it free from the tab at the top.
– Remove and wash the foam air filter element
in warm soapy water to clean it. Do not
use solvents to clean it.
– Allow the filter to dry 100% before refitting it on to the engine.
– Refit cover
.
– Insert screw
and turn clockwise to tighten. Replace the filter if it appears worn or
damaged.
13.2 SPARK PLUG MAINTENANCE (FIGS.16 – 17)
Over time the spark plug can become contaminated.
This can be due to adverse running conditions such
as, working with part throttle for a prolonged
period or a fuel mix containing too much oil. This
contamination can build up causing the engine to
run roughly, reduce the fuel consumption or create
starting problems.
– Without using any tools [so as to avoid damaging
the H.T. lead] remove the lead
from the back
of the spark plug.
– Using the spark plug spanner supplied
, turn
the spark plug
anticlockwise to remove it.
– Clean the spark plug and check the electrode gap.
Maintain a gap of 0.6 to 0.7mm.
Attention
The spark plug should be replaced every
60 hours of machine use or annually during a
service. The replacement plug must be an NHSP
L8RTF, Oregon O-P17Y or another compatible
resistor type plug with the same heat range.
– Make sure you correctly seat the spark plug
thread in to the engine before screwing it
clockwise in to the head.
FIG. 34
FIG.15
FIG.16
