McCulloch B33 B Manual De Instrucciones página 14

The life span of the unit can be decreased and the
risk of accidents can increase if maintenance is not
carried out correctly and if service and/or repairs
are not carried out professionally. If you need further
information, please contact your nearest authorized
service dealer.
Unit/Maintenance Safety
Disconnect the spark plug before performing
maintenance.
Maintenance schedule
The following is a list of the maintenance that must be
performed on the unit. Most of the items are described
in the Maintenance section. The user must only carry
out the maintenance and service work described in
this Operator's Manual. More extensive work must
be carried out by an authorized service workshop. Do
maintenance more frequently if it is extremely dusty.
n Weekly:
! Clean the outside of the unit.
! Make sure the throttle trigger lock and the throttle
function correctly from a safety point of view.
! Check that the START/STOP switch works
correctly.
! Check that the cutting attachment does not rotate
at idle.
! Clean the air • lter. Replace if necessary.
! Check that the cutting attachment guard is
undamaged and not cracked. Replace the cutting
attachment guard if it has been exposed to impact
or is cracked.
! Check that the trimmer head is undamaged and not
cracked. Replace the trimmer head if necessary.
! Check that the locking nut of the cutting equipment
is tightened correctly.
! Check that nuts and screws are tight.
! Check that there are no fuel leaks from the engine,
tank or fuel lines.
n Monthly:
! Check the starter and starter cord.
n Annually:
! Clean the outside of the spark plug. Remove it and
check the electrode gap. Adjust the gap to 0.6 mm
(0.024 in) or replace the spark plug. Check that the
spark plug is • tted with a suppressor.
! Clean the outside of the carburetor and the space
around it.
! Check that the bevel gear is • lled three-quarters full
with lubricant. Fill if necessary using special grease.
! Check the fuel • lter from contamination and the
fuel hose from cracks or other defects. Replace if
necessary.
! Check all cables and connections.
! Check the clutch, clutch springs and the clutch
drum for wear. Replace if necessary by an
authorized service workshop.
! Replace the spark plug. Check that the spark plug
is • tted with a suppressor.
! Clean or replace the spark arrestor mesh, if
supplied.
MAINTENANCE
Air ! lter
Remove the air • lter cover and take out the • lter.
Wash it clean in warm, soapy water. Rinse thoroughly.
Ensure that the • lter is dry before re• tting it.
An air • lter that has been in use for a long time cannot
be cleaned completely. The • lter must therefore
be replaced with a new one at regular intervals. A
damaged air • lter must always be replaced.
Spark plug
The spark plug condition is in# uenced by:
! incorrect carburetor adjustment.
! an incorrect fuel mixture (too much or incorrect type
of oil).
! a dirty air • lter.
These factors cause deposits on the spark plug
electrodes, which may result in operating problems
and starting dif• culties.
If the unit is low on power, dif• cult to start or runs
poorly at idle speed always check the spark plug • rst
before taking any further action.
If the spark plug is dirty, clean it and check that the
electrode gap is correct.
CAUTION:
type. Use of the wrong spark plug can damage the
piston/cylinder.
Carburetor
The basic carburetor settings are adjusted during
testing at the factory. Adjustment must be carried out
by a trained technician.
Muf" er
In some regions, muf# ers are equipped with a special
spark arrestor mesh. If your unit has spark arrestor
mesh, it must be checked and, if necessary, cleaned
by a servicing dealer. If the mesh is damaged, it must
be replaced.
If the mesh is frequently blocked, this can be a sign
that the performance of the catalytic converter is
impaired. Contact your servicing dealer to inspect the
muf# er. A blocked mesh will cause the unit to overheat
and result in damage to the cylinder and piston.
CAUTION:
loose muf# er. Ensure the muf# er bolts are tight.
Bevel gear
Make sure that the bevel gear is " lled three-quarters
full with gear grease. The grease in the bevel gear
does not normally need to be changed except if
repairs are carried out.
14
Always use the speci• ed spark plug
Do not use a unit that has a faulty or