Shindaiwa AH243S-LW, Operator'S Manual

Page: 33 / 164

31
Maintenance and care
Low power output
Diagnosis Cause Solution
Is the engine overheating?
Œ
Operator is overworking the
unit.
Œ
Shorten trimmer line. Cut at a
slower rate.
Œ
Carburetor mixture is too lean.
Œ
Consult your dealer
Œ
Improper fuel ratio.
Œ
Refill with fresh, clean unleaded
gasoline with a pump octane of 89
or higher mixed with a 2-cycle air
cooled mixing oil that meets or ex-
ceeds ISO-L-EGD and/or JASO
FC, FD classified oils at 50:1 gas-
oline/oil ratio.
Œ
Fan, fan cover, cylinder fins
dirty or damaged.
Œ
Clean, repair or replace as neces-
sary.
Œ
Carbon deposits on the piston
or in the silencer.
Œ
Consult your dealer
Engine is rough at all speeds. May also
have black smoke an/ or unburned fuel at
the exhaust.
Œ
Clogged air cleaner element.
Œ
Service the air cleaner element.
Œ
Loose or damaged spark plug.
Œ
Tighten or replace.
Œ
Air leakage or clogged fuel line.
Œ
Repair or replace fuel filter and/or
fuel line.
Œ
Water in the fuel.
Œ
Replace the fuel.
Œ
Piston seizure.
Œ
Faulty carburetor and/or dia-
phragm.
Œ
Consult your dealer
Engine is knocking.
Œ
Overheating condition.
Œ
See above.
Œ
Improper fuel.
Œ
Check fuel octane rating; check for
presence of alcohol in the fuel. Re-
fuel as necessary.
Œ
Carbon deposits in the com-
bustion chamber.
Œ
Consult your dealer