Dolmar PB-7660.4, Original Instruction Manual

Page: 16 / 172

CAUTION:
When you store the machine for a long time,
drain all fuel from the fuel tank and carburetor, and keep it at a
dry and clean place.
Drain fuel from the fuel tank and carburetor before storing the
machine as follows:
1. Remove the fuel tank cap, and drain fuel completely. If there is
any foreign materials remaining in the fuel tank, remove it completely.
2.
Pull out the fuel filter from the refill port using a wire.
3. Push the primer pump until fuel is drained from there, and drain
fuel coming into the fuel tank.
4. Reset the filter to the fuel tank, and securely tighten the fuel tank
cap.
5. Then, continue to operate the engine until it stops.
6. Remove the spark plug, and drip several drops of engine oil
through the spark plug hole.
7. Gently pull the starter handle so that engine oil will spread over
the engine, and attach the spark plug.
8. Keep the machine with its carry handle upside.
9. Keep the drained fuel in a special container in a well-ventilated
shade.
Fault location
Fault System Observation Cause
Engine not starting or with difficulty Ignition system Ignition sparks. Fault in fuel supply or compression
system, mechanical defect.
No ignition sparks. STOP-switch operated, wiring fault or
short circuit, spark plug or connector
defective, ignition module faulty.
Fuel supply Fuel tank filled. Incorrect choke position, carburetor
defective, fuel supply line bent or
blocked, fuel dirty.
Compression No compression when pulled over. Cylinder bottom gasket defective,
crankshaft seals damaged, cylinder or
piston rings defective or improper seal -
ing of spark plug.
Mechanical fault Starter not engaging. Broken starter spring, broken parts
inside of the engine.
Warm start problems - Tank filled. Ignition sparks. Carburetor contaminated, have it
cleaned.
Engine starts but dies Fuel supply Tank filled. Incorrect idling adjustment, carburetor
contaminated.
Fuel tank vent defective, fuel supply
line interrupted, cable or STOP-switch
faulty.
Insufficient performance Several systems may simultaneously
be affected
Engine idling poor. Air filter contaminated, carburetor con -
taminated, muffler clogged, exhaust
duct in the cylinder clogged.
Interval of inspection and maintenance
- Before
operation
After fuelling Daily (10h) 50h 200h 600h or 2 years
whichever
earlier
Before storage
Engine oil Inspect / refill - - - - - -
Replace - - -
(Note1)
- - -
Tightening parts
(bolt, nut)
Inspect - - - - - -
Cooling air inlet Clean / inspect - - - - - -
Fuel tank Clean / inspect - - - - - -
Drain fuel - - - - - -
(Note3)
Throttle trigger /
throttle lever
Check function - - - - - -
Stopping the
engine
Check function - - - - - -
Adjustment of
idling speed
Inspect / adjust - - - - - -
Air cleaner Clean - - - - - -
Inspect / replace
if necessary
- - - - - -
Control cable Inspect / adjust - - - - - -
Inspect / replace
if necessary
- - - -
(Note2)
- -
Spark plug Inspect / adjust
gap if necessary
- - - - - -
Clean / replace if
necessary
- - - - - -
Plug cord Inspect / replace
if necessary
- - - -
(Note2)
- -
Fuel pipe Inspect - - - - - -
Replace - - - -
(Note2)
- -
Fuel filter Clean / replace if
necessary
- - - - - -
16 ENGLISH