Shindaiwa HT231 - Manual (Page 20)

20
Is the engine overheating?
Engine is rough at all
speeds. May also have
black smoke and/or
unburned fuel at the
exhaust.
Operator is overworking the unit.
Carburetor mixture is too lean.
Improper fuel ratio.
Fallen leaves or debris on intake cover.
Fan, fan cover, cylinder fins dirty
or damaged.
Carbon deposits on the piston or
in the muffler.
Clogged air cleaner element.
Loose or damaged spark plug.
Air leakage or clogged fuel line.
Water in the fuel.
Piston seizure.
Faulty carburetor and/or diaphragm.
Overheating condition.
Improper fuel.
Carbon deposits in the
combustion chamber.
Use a lower throttle setting.
Consult with an authorized servicing
dealer.
Refill with clean, fresh unleaded
gasoline with a pump octane of 87 or
higher, mixed with a 2-stroke air cooled
engine oil that meets or exceeds ISO-L-
EGD and/or JASO FD classified oils at
50:1 gasoline/oil ratio .
Clean the intake cover.
Clean, repair or replace as necessary.
Consult with an authorized
servicing dealer.
Service the air cleaner element.
Tighten or replace the spark plug.
See page 11.
Repair or replace fuel filter and/or
fuel line.
Replace the fuel. See page 7.
Consult with an authorized
servicing dealer.
See above.
Check fuel octane rating; check for
presence of alcohol in the fuel. See
page 7. Refuel as necessary.
Consult with an authorized
servicing dealer.
What To Check Possible Cause Remedy
LOW POWER OUTPUT
Engine is knocking.
Troubleshooting Guide (continued)