Dnepr MT9 - Page 12

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Tr oub le
-~
Cause
3. Filter and petrol cock
dirty or clogged
4. No spark produced by
plug :
a) no gap between plug
electrodes, dirt and carbon
deposits in
plugs, insulator
punctured;
b) no
gap between breaker
(contact) points, breaker po-
ints oi led or burnt;
c) ignition co il faulty;
d)
low-tension wires bro-
ken
Symptoms and fault tracing
3. Di sconnect petrol supply
pipes from carburettors and
check to see whether petrol
runs if cock is opened for re-
serve fuel consumption
a) screw out the p lu g, con-
nect
its body to "earth" and
check whet h er spa rk is pro-
duced at pl ug electrodes;
b)
remove wire tip and
check wh ether spark appears
at tip by connecting it to
"e arth ", with a small air gap_
If spark is produced, this
means that plug is f aulty. Ab-
sence of spark i ndicates that
there is no gap between bre-
ak
er points;
c)
if , duri ng checking by
method specified in step "b",
spark does not appear, this
indicates that ignition coi l is
probably
at fault;
d)
remove front cover,
switc h on ignition. Check por-
tab le l amp circuit. for which
Continued
Remedy
3. Disconnect the ends of
petrol supply pipes from car-
burettors and blow them
Lhr ough (one after another, by
clutching the ot her pipe).
If this fails to make petrol
fl
ow in a full jet, remove set-
tler, cock filter a
nd wash them
with petrol
a) replace plugs or, ii their
condition permits,
sel the re-
quired
gap between electrodes,
clean the p
lu gs;
b) after removing crank-
case outer cover, set breaker
point gap within 0.4 and
O.G mm. Clean an d, if nec essa-
ry, trim the contact points with
needle f il e;
c)
replace igniti on coil
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