Dnepr MT9 - Page 14

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Trouble
Irregular, erratic opera-
tion of engine; only one cy-
lind
er functioning
. --
Cause I Symptoms and fault tracing
6. Clutch s li pping I 6. Engine c rank sh aft will
not rotate when pressing
down starting pedal
I. Mixture too lean: I I. Engine back-fires
a) petro l supply to carbu-
rettor is insufficient and ir-
regular;
b) carb urett or jets dirty;
c) water in petrol
2. Plugs faulty
3. Poor contact at sto r age
ba tlery term ina Is
4. Bad condition of breaker
points
5. Capacitor faulty or bad-
ly connected
6. Mixture enrichment due
to float chamber being over -
filled with petrol:
a) float needle valve dirty
and leaky (lets petrol out);
b) leaky float
c)
carburettor jet came un-
c:rrPH'Prl
2. Same as in step 4 a of
the first failure of
engine
3. Pilot l amp blinks
4. Spark occurs irr egular ly
between wire
tips and "earth"
5. Bangs heard from silen-
cer,
bad spa rk
a) engine smokes badly,
bangs heard from silencer,
petrol leaking thr ough carbu-
rctlor
- -
Continued
Remedy
6. Adjust the driv e; if clutch
continues to slip, r epair the
clutch (dismantle and exam ine
it)
I. Same as in step 3 of the
first failure of e ngin e;
c) change petrol
2. Same as in step 4 a of
the fi r st failure of e ngine
3. Ensure good contact at
storage battery te rminals. Clean ;'
the contacts, light en screws
faste ning the wires
1
--'
4. Examine co ntact points.
trim or file them off, adjust
the gap
5. Ensure good contact or
repla ce capac itor
a) clean the needle valve;
b) repair the carb ur ettor, re-
place or repair the float;
fit the jet properly