Efco MT4400 Instruction Manual download pdf (Page 23)

OPERATION

Breaking-in the Engine

The engine reaches the maximum power after 5-8 hours of activity.

During this period of breaking-in do not make the machine function

idly at full throttle, to avoid excessive functioning stress.

CAUTION! – During the braking-in period do not vary

the carburetion to obtain a presumed power

increment; the engine can be damaged.

Difficult Starting (or starting a flooded engine)

The engine may be flooded with too much fuel if it has not started

after 10 pulls. Flooded engines can be cleared of excess fuel by

following the warm engine starting procedure listed above.

Ensure the ON/STOP switch is in the ON position. Starting could

require pulling the starter rope handle many times depending on

how badly the unit is flooded. If engine fails to start refer to the

TROUBLESHOOTING TABLE (page 35).

Engine is Flooded

If you did not move the choke lever to warm start, quickly enough

after the engine began to fire, the combustion chamber is flooded.

• Set the on/off swich to STOP.

• Open the twist lock (1, Fig. 50) in the direction of the arrow.

• Remove the filter cover (2).

• Engage a suitable tool in the spark plug boot (3, Fig. 51).

• Pry off the spark plug boot.

• Unscrew and dry off the spark plug.

• Open the throttle wide.

• Pull the starter rope several times to clear the combustion

chamber.

• Refit the spark plug and connect the spark plug boot, press it

down firmly – reassemble the other parts.

• Set the on/off swich to I, the starting position.

• Set the choke lever to warm start – even if engine is cold.

• Now start the engine.

Stopping The Engine

Release the throttle trigger (B, Fig. 52) and let the engine return

to idle.

Switch off the engine, returning the choke lever (C) to the fully up

position (3). Do not put the chain saw on the ground when the

chain is still moving. For additional safety, set the chain brake

when the saw is not in use.

In the event that the “STOP” position of the switch will not

function, pull the choke lever out to the fully extended position

/ Full Choke, refer to Fig. 52 to stop the engine.

CAUTION: The chain contracts as it cools down. If it

is not slackened, it could damage the crankshaft

and bearings.

Pre-operation checking

WARNING: THE SAW CHAIN SHOULD NEVER TURN

AT IDLE. Turn the idle speed screw “T” counterclockwise

to reduce the idle RPM and stop the chain, or contact

a Servicing Dealer for adjustment and discontinue

use until the repair is made.

Serious personal injury may result from the saw

chain turning at idle.

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Efco MT4400 Instruction Manual Page 23

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