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HP726 Troubleshooting Guide (Engine continued)
Symptom
Poor
acceleration.
Engine stops
abruptly.
Engine difficult
to shut off.
Sprayer pump
oscillates at
engine idle.
ADDITIONAL PROBLEMS
Possible Cause
Clogged air filter.
Clogged fuel filter.
Carburetor mixture
too lean.
Idle speed set too low.
Switch turned off.
Fuel tank empty.
Clogged fuel filter.
Water in the fuel.
Shorted spark plug or
loose terminal.
Ignition failure.
Piston seizure.
Ground (stop) wire is
disconnected, or switch
is defective.
Overheating due to
incorrect spark plug.
Overheated engine.
Engine idle too high.
Broken clutch spring or
worn clutch spring boss.
Loose attachment holder.
Remedy
Clean the air filter.
Replace the fuel filter.
Consult with an autorized
servicing dealer.
+
Adjust: 3000 rpm ( 250)
Reset the switch and re-start.
Refuel.
Replace filter.
Drain; replace with clean fuel.
Clean and replace spark plug,
tighten the terminal.
Replace the ignition unit.
Consult with an authorized
servicing dealer.
Test and replace
as required.
Clean and regap to 0.024".
Correct plug: NGK BMR6A.
Idle engine until cool.
Set idle: 3000 rpm ( 250)
Replace spring/shoes as
required, check idle speed.
Inspect and re-tighten
holders securely.
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