ETQ 170F User Manual

Possible Cause Remedy
Fuel system clogged. Clogged fuel line or clogged
fuel
filter.
Clean fuel filter and fuel pipe. Check the fuel
switch,
it should be opened fully.
Fuel pump is bad.
Service or change the damaged parts of the fuel
p
um
p
.
Nozzle not operating correctly or incorrect
in
j
ection
p
ressure.
Adjust the injection pressure.
Carbon deposits in the spray hole. Clean ou
t
the spray hole.
Adhered needle valve. Clean o
r
change needle valve.
Fitting between the needle valve and needle valve
body
is too loose.
Change the needle valve or needle valve body.
Air filter is dirty. Disassemble the air filter assembly and clean the
core
and air filter.
Engine may be to slow. Check the speed of the tachometer. Adjust the
high
speed limiting screw.
5-3 Engine stops automatically
Possible cause Remedy
No fuel in sys
t
em. Add fuel to the fuel tank.
Fuel line is clogged. Clean ou
t
fuel line.
There is ai
r
in fuel system. Clean ou
t
the system and
p
u
t
new fuel in.
Needle valve of nozzle adhered. Clean or grind the nozzle if necessary replace the
nozzle.
Ai
r
filte
r
is clogged. Clean the ai
r
filter.
The load suddenly increases. Decrease the load.
5-4 Engine exhaust very black
Possible cause Remedy
Overloaded engine Decrease the load. If driven machine is not
properly
fitted with proper engine, change the
engine.
Bad fuel injection. Check the fuel injection pressure and spraying
conditions.
Correct or replace the nozzle.
Not enough intake air or problems with leaking air. Clean the air filter and check to see what the cause
of
the leak is and fix as necessary.
5-5 Engine exhaust very blue
Possible cause Remedy
Engine oil in the cylinder. Check the oil level and drain out unnecessary engine
oil.
Piston ring worn or piston ring gaps are all
aligned
to permit oil to travel up into
com
b
ustion cham
b
er.
Check or change the piston rings and make sure the
gaps
are not all aligned.
Worn
p
iston o
r
worn cylinder. Replace as necessa
r
y.
Valve and o
r
valve guide worn. Change the valve o
r
valve guide as necessa
r
y.
51

ETQ 170F Specifications

General

Brand	ETQ
Model	170F
Category	Engine
Language	English