PAGE 28 — C10SH8-PH8 CONCRETE MIXER • OPERATION AND PARTS MANUAL — REV. #0 (03/06/09)
TROUBLESHOOTING (ENGINE)
Practically all breakdowns can be prevented by proper
handling and maintenance inspections, but in the event of
a breakdown, please take a remedial action following the
diagnosis based on the Troubleshooting (Tables 10 and 11)
information shown below and on the next page. If the problem
cannot be remedied, please leave the unit just as it is and
consult our company’s business offi ce or service plant.
Engine Troubleshooting
Table 10.
Symptom
Possible Problem
Solution
Diffi cult to start
Fuel is available but spark plug will not
ignite (power available at high tension
cable).
Ignition plug being bridge?
Check ignition system.
Carbon deposit at ignition?
Clean or replace ignition.
Short circuit due to defective insulators?
Replace insulators.
Improper spark gap?
Set spark plug gap to the correct gap.
Fuel is available but spark plug will not
ignite (power
NOT
available at high
tension cable).
Short circuit at stop switch?
Check stop switch circuit. Replace stop
switch if defective.
Ignition coil defective?
Replace ignition coil.
Fuel is available and spark plug ignites
(compression
normal
).
Muffl er clogged with carbon deposits?
Clean or replace muffl er.
Fuel in use inadequate (water, dust)?
Flush fuel system and replace with fresh
fuel.
Air cleaner clogged?
Clean or replace air cleaner.
Fuel is available and spark plug ignites
(compression
low
).
Defective cylinder head gasket?
Tighten cylinder head bolts or replace
head gasket.
Cylinder worn?
Replace cylinder.
Spark plug loose?
Tighten spark plug.
Operation not satisfactory
Not enough power available
(compression normal, no miss-fi ring).
Air cleaner clogged?
Air in fuel line?
Bleed (remove air) from fuel line.
Fuel level in carburetor fl oat chamber
improper?
Adjust carburetor fl oat.
Carbon deposits in cylinder?
Clean or replace cylinder.
Not enough power available
(compression normal, miss-fi ring).
Ignition coil defective?
Flush fuel system and replace with fresh
fuel.
Ignition plug often shorts?
Replace ignition wires, clean ignition.
Fuel in use inadequate (water, dust)?
Flush fuel system and replace with fresh
fuel.
Rotational speed fl uctuates.
Governor adjustment improper?
Adjust governor to correct level.
Governor spring defective?
Clean or replace ignition.
Fuel fl ow erratic?
Check fuel line.
Air taken in through suction line?
Check suction line.
Recoil starter not working properly.
Dust in rotating part?
Clean recoil starter assembly.
Spring failure?
Replace spiral spring.
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