Shindaiwa AH242, Owner'S/Operator'S Manual

Page: 15 / 32

15
Cutting performance of your machine
depends a great deal on proper cutter
blade adjustment. Properly adjusted
blades will oscillate freely yet help
prevent binding of cut material between
blades. Adjust blades as follows:
1. Loosen all blade locknuts at least
one full turn.
2. Tighten each blade shoulder bolt
firmly, and then loosen the shoulder
bolts 1/4 to 1/2 turn.
3. Working from the gearcase
end, lock each bolt in place by
firmly tightening its locknut while
preventing the shoulder bolt from
turning.
Locknut
Guide Bar
Cutter
Blades
Shoulder Bolt
Washer (should
turn freely)
Adjusting cutter blades
Cutter blade adjustment
When shoulder bolt adjustment is
correct, there should be a gap of
0.25 - 0.50 mm (0.010 - 0.020 in.)
between the cutter blades and the flat
washers, and the flat washer beneath
each bolt head should turn freely.
WARNING!
The cutter blades are very sharp! Always wear gloves when working around
the cutter assembly.
CAUTION!
Operating the trimmer with worn
or improperly adjusted cutters will
reduce cutter performance and
may also damage your machine.
Never operate the machine with
damaged or worn cutters.
WARNING!
Before performing any
maintenance, repair, or cleaning
work on the unit, make sure the
engine and cutting attachment are
completely stopped. Disconnect the
spark plug wire before performing
service or maintenance.
WARNING!
Nonstandard accessories,
cutting attachment, or replacement
parts may not operate properly with
your unit and may cause damage and
lead to personal injury.
IMPORTANT!
MAINTENANCE, REPLACEMENT OR REPAIR OF EMISSION CONTROL DEVICES AND SYSTEMS MAY BE PERFORMED
BY ANY REPAIR ESTABLISHMENT OR INDIVIDUAL; HOWEVER, WARRANTY REPAIRS MUST BE PERFORMED BY A
DEALER OR SERVICE CENTER AUTHORIZED BY ECHO, INC. THE USE OF PARTS THAT ARE NOT EQUIVALENT IN PER-
FORMANCE AND DURABILITY TO AUTHORIZED PARTS MAY IMPAIR THE EFFECTIVENESS OF THE EMISSION CON-
TROL SYSTEM AND MAY HAVE A BEARING ON THE OUTCOME OF A WARRANTY CLAIM.
General maintenance
NOTE:
Using non-standard replacement parts could invalidate your Shindaiwa warranty.
Muffler
This unit must never be operated with a faulty or missing
spark arrester or muffler. Make sure the muffler is well
secured and in good condition. A worn or damaged muffler
is a fire hazard and may also cause hearing loss.
Spark Plug
Keep the spark plug and wire connections tight and clean.
Fasteners
Make sure nuts, bolts, and screws (except carburetor
adjusting screws) are tight.