ENAR ZEN SERIE Manual De Instrucciones página 60

Function of back motion starter faulty
en
DIESEL ENGINE (air-cooled)
Deficient start-up:
28
ZEN / ZEN-E

Faulty air filter

Carbon deposit in cylinder

Fuel level in carburettor incorrect

Insufficient compression
 (See "Deficient compression" above)

Compression is correct but ignition is faulty

There is water in the fuel

The ignitor plug is soiled

Faulty ignition coil

Ignition coil often short-circuits

Vibrator full with excess oil
- Engine overheats

Carbon deposit in the fuel chamber or in relief port

Calorific value of ignitor plug incorrect

Cooling fins soiled
- Rotation speed fluctuates

Control setting incorrect

Control spring incorrect

Deficient fuel flow

Air enters intake manifold
- Rotating part stuck with dust
- Faulty helicoidal spring
A.- Deficient compression

Zero compression

Faulty admission or exhaust valve

Incorrect adjustment of decompression system

There is hardly any compression or this is very low

Faulty contact of valve seating

Worn piston ring

Worn cylinder

Faulty adjustment surface of cylinder and cylinder head

Loose injection seat
B.- Fuel not injected correctly into combustion chamber

Insufficient or zero fuel flow

Air vent in tank lid blocked.

Fuel filter passage blocked and filter sieve blocked

Fuel filter cock closed

Air retained in pipe (especially when tank is empty)

Fuel is not injected into combustion chamber

Injection pump cylinder or piston stuck

Injector blocked

Injector needle stuck
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