e) When the pilot lamp turns on, return the check switch to the
OFF
position. The
T.C.I.
unit is
If the T.C.I. unit checker is not available, use
a
circuit tester as described below.
"i) Connect the positive
(+)
terminal
of
the tester to the primary lead.
normal if a spark is observed at that instant.
Connect the negative
(-)
terminal of the tester to the unit casing.
Resistance:
80
to 150 ohms (Tester range
x
1
ohm)
Connect the positive
(+)
terminal
of
the tester to the unit casing.
Resistance:
7
to
10
k
oiims
(Tester range
x
100
ohms)
*ii) Connect the negative
(-)
terminal
of
the tester to the p$mary lead.
If
the
T.C.I.
unit is found not normal by the above test, replace the unit.
2)
Continuity test on generating assembly
Measure the resistance with a circuit tester.
a) Resistance between primary lead and core:
1.1
to 1.5 ohms
'
b) Resistance between secondary lead and core:
10
to
13
k ohms
If the generating assembly is found not normal by the above test, replace the assembly.
Note:
A
circuit tester is not
so
accurate that the resistance values measured by the tester may vary de-
pending on the type
of
tester, or the condition
of
battery, or the skill of operator.
-
8-2
IDLING
IMPROPER
-
0
1)
If the carburetor's pilot screw is not correctly adjusted, adjust it. (Refer
to
the section on carburetor
adjustments.)
2)
Any
of
starting trouble causes leads to improper idling.
8-3
OVERHEATING
and
ENGINE KNOCKING
1)
If
ignition timing is advanced, adjust it to
23"
*
2".
(EC06)
2)
If
the cmbustion chamber has excessive carbon deposits, clean it.
'
3)
If a spark plug
of
a heat value too low is used, use one of the specified heat value. Example:
NGK
B6HS
4)
If the gasoline air-mixture is
too
lean, clean the jets and orifices
of
the carburetor.
Also
clean the air-
5)
If
overload is the case, reduce it to normal level or below.
for EC06,
NGK
B7HS
for
EC08
cleaner.
8-4
POWER
DROP'
1)
Replace the cylinder, piston, and/or piston rings if worn.
2)
If
the carburetor is faulty, adjust or clean it.
3)
If the spark plug is faulty (dirty, leaky, or not properly insulated), clean or replace it.
4)
Retighten the cylinder if gas leaks.
5)
Replace or adjust if the magneto
or
contact breaker is faulty.
6)
Clean the air cleaner if clogged up.
7)
Replace the crankshaft oil seals
if
compressed gas leaks due to seal wear.
-19-
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