Shindaiwa EB221S Operator's Manual page 26

Maintenance and care
Diagnosis
Is the engine overheating?
Engine is rough at all speeds. May also
have black smoke and/or unburned fuel
at the exhaust.
Engine is knocking.
Low power output
Cause
Operator is overworking the
unit.
Carburettor mixture is too lean.
Improper fuel ratio.
Fallen leaves or debris on
housing cover.
Fan, fan cover, cylinder fins
dirty or damaged.
Carbon deposits on the piston
or in the silencer.
Clogged air cleaner element.
Loose or damaged spark plug.
Air leakage or clogged fuel line.
Water in the fuel.
Piston seizure.
Faulty carburettor and/or dia-
phragm.
Overheating condition.
Improper fuel.
Carbon deposits in the com-
bustion chamber.
24
Solution
Use a lower throttle setting.
Consult your shindaiwa dealer.
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.
Clean the housing cover.
Clean, repair or replace as neces-
sary.
Consult your shindaiwa dealer.
Service the air cleaner element.
Tighten or replace.
Repair or replace fuel filter and/or
fuel line.
Replace the fuel.
Consult your shindaiwa dealer.
See above.
Check fuel octane rating; check for
presence of alcohol in the fuel. Re-
fuel as necessary.
Consult your shindaiwa dealer.