Spark Plug; Drive And Gearbox - Husqvarna LB 553SE Operator's Manual

Assembly
• Place the blade against the blade bracket. Make sure
the cutter centres correctly on the shaft. Place the
blade so that it is positioned at a 90 degree angle to
the key slot in the engine shaft.
Fit the spring washer and tighten the bolt and washer
correctly. The bolt must be tightened with a torque of 40
Nm.
• Pull the blade around by hand and make sure it
rotates freely. Test run the machine.

Spark plug

NOTICE! Always use the recommended spark plug
type! Use of the wrong spark plug can damage the
piston/cylinder.
• If the machine is low on power, difficult to start or runs
poorly at idle speed: always check the spark plug first
before taking other steps. If the spark plug is dirty,
clean it and check that the electrode gap is 0.7-0.8
mm. Replace if necessary.

Drive and gearbox

The centre belt runs between the engine shaft and the
gearbox.
Ensure the wheels and wheel axles are clean and free
from leaves, grass, etc. It is also important to keep clean
around the drive gearbox.
MAINTENANCE
• Remove the protective cover by unscrewing the
screws.
• Now guide the protective cover out under the stay and
over the drive axle.
• Clean the gearbox with a brush. Also check that the
drive belt and belt pulley are undamaged, for example,
no cracks.
Replacing the drive belt
• Remove the cutter.
• Pull the belt off of the engine shaft's belt pulley.
• Replace the belt with a new one.
• Assemble the blade.
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