Operating Instructions; Cleaning The Air Filter; Checking The Spark Plug - Brother BHL 3040 Operating Instructions Manual

Stopping
1 Release the throttle trigger. Let the engine idle. push-
the ignition switch to position "stop". The engine will-
now stop.

Operating Instructions

During break-in period
A factory new machine should not be run at high revs (full
throttle off load) for the first three tank fillings. This avoids
unnecessary high loads during the break-in period. As all
moving parts have to bed in during the break-in period,
the frictional resistances in the engine are greater during
this period. power after about 5 to 15 tank fillings.
During operation
After a long period of full-throttle operation, allow engine
to run for a while at idle speed so that the heat in the en-
gine can be dissipated by flow of cooling air. This protects
engine-mounted components (ignition, carbur-etor) from
thermal overload.
After finishing work
Wait for engine to cool down. Drain the fuel tank. Store
themachine in a dry place. Check tightness of nuts and
screws (not adjusting screws) at regular intervals and
retighten as necessary.

Cleaning the Air Filter

Dirty air filters reduce engine power increase fuel con-
sumption and make starting more difficult.
If there is a noticeable loss of engine power
1 Remove the fixing screw of the air filter cover
2 Clean the filter using soap and water
Never use petrol or benzene !
3 Let the Filter dry in the air.
4 Now put the filter in again proceeding the otherway
round.

Checking the Spark Plug

Wrong fuel mix (too much engine oil in the gasoline), a
dirty air filter and unfavorable running conditions (mostly
at part throttle etc.) affect the condition of the spark plug.
These factors cause deposits to form on the insulator
nose which may result in trouble in operation.
If engine is down on power, difficult to start or runs poorly
at idling speed, first check the spark plug.
• Remove spark plug.
• Clean dirty spark plug.
• Check electrode gap (A) and readjust .
• Use only resistor type spark plugs of the approved
range.
Rectify problems which have caused fouling of spark
plug:
• Too much oil in fuel mix.
• Dirty air filter
• Unfavorable running conditions, e.g. operating at part
load.
Fit a new spark plug after approx. 100 operating
hours or earlier if the electrodes are badly eroded.
To reduce the risk of fire and burn injury, use only
spark plugs authorized by Sunray. Always press
GB-10