Shindaiwa B530 Owner's Manual page 20

Troubleshooting Guide (Continued)
What To Check
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.
20
Low Power Output
Possible Cause
Operator is overworking
the unit.
Carburetor mixture is
too lean.
Improper fuel ratio.
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.
Remedy
Cut at a slower rate.
Consult with an authorized
servicing dealer.
Refill with clean fresh unleaded
gasoline with a pump octane of
87 or higher, mixed with
Premium 2-cycle mixing oil at a
50:1 gasoline/oil ratio.
Clean, repair or replace
as necessary.
Consult with an authorized
servicing dealer.
Clean or replace the air filter.
Tighten or replace the plug with
a NGK BMR6A. Re-start.
Repair or replace fuel
filter and/or fuel line.
Refill with fresh fuel/oil
mixture.
Consult with an authorized
servicing dealer.
Consult with an authorized
servicing dealer.
See above.
Check fuel octane rating;
check for presence of
alcohol in the fuel. Refuel as
necessary.
Consult with an authorized
servicing dealer.