Jacto HP726 Owner's/Operator's Manual page 21

HP726 Troubleshooting Guide (Engine 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
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 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
Consult with an authorized
servicing dealer.
Re-fill with fresh fuel of the
correct mixture (gasoline
and Shindaiwa Premium
2-cycle Engine Oil, 50:1 ratio).
Clean, repair or replace
as necessary.
Consult with an authorized
servicing dealer.
Service the filter.
Tighten or replace.
Repair or replace
filter and/or fuel line.
Replace the fuel.
Consult with an authorized
servicing dealer.
Consult with an autorized
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.