28
Maintenance and care
Low power output
Diagnosis
Cause
Solution
Is the engine overheating?
Operator is overworking the
unit.
Shorten trimmer line. Cut at a
slower rate.
Carburetor mixture is too lean.
Consult your dealer
Improper fuel ratio.
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.
Fan, fan cover, cylinder fins
dirty or damaged.
Clean, repair or replace as neces-
sary.
Carbon deposits on the piston
or in the silencer.
Consult your dealer
Engine is rough at all speeds. May also
have black smoke an/ or unburned fuel at
the exhaust.
Clogged air cleaner element.
Service the air cleaner element.
Loose or damaged spark plug.
Tighten or replace.
Air leakage or clogged fuel line.
Repair or replace fuel filter and/or
fuel line.
Water in the fuel.
Replace the fuel.
Piston seizure.
Faulty carburetor and/or dia-
phragm.
Consult your dealer
Engine is knocking.
Overheating condition.
See above.
Improper fuel.
Check fuel octane rating; check for
presence of alcohol in the fuel. Re-
fuel as necessary.
Carbon deposits in the com-
bustion chamber.
Consult your dealer
