Shindaiwa EB630 Operator's Manual page 14

Troubleshooting Guide
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.
14
LOW POWER OUTPUT
Possible Cause
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 filter.
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
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
Shindaiwa Premium 2-cycle mixing oil at a
50:1 gasoline/oil ratio.
Clean the intake cover.
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
Champion RCJ6Y or equivalent type spark plug
of the correct heat range.
Repair or replace filter and/or fuel line.
Refill with fresh fuel/oil mixture. See Page 7.
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.
See page 7.
Consult with an authorized servicing dealer.