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I
I
CORRECTION
>ORRECTIOh
METHOD
LIMIT
USE
I
REMARKS
1
TOOL
1'
ITEM
ENGINE
MODEL
STANDARD
SIZE
t
1
TOLERANCE
LIMIT
Free length EY15
1
EY20
Vernier
calipers
37
-1.5 Replace
Squareness
I
E:::
'.'
1
length
I
For
total
Replace
Intake
Exhaust
6.5
dia'
-0.025-4.040
-0.056--0.078
Micro-
meter
-0.15
Replace
Valve stem
O.D.
Clearance between
stem and guide
Intake
Exhaust
6.5 dia.
-0.025--0.040
-0.056--0.078
0.025
-
0.062
Intake
Exhaust
Intake
0.3
At
middle
Cylinder
0.3
Replace
Exhaust
0.056
-
0.100
When cold
0.10
*0.02
Tappet clearance
EY20
I
EY15
below
above
0.05
0.25
0.5
Correct
Replace
0.1
-
0.3
Intake 5.9
Exhaust 5.9
-1
.o
Vernier
calipers
Vernier
calipers
-
0.5
0.2
-1
.o
-0.5
0.2
Stem end length
EY
20
Replace
Replace
Intake 6.2
Exhaust 6.4
35.6
Total length +0.06
-
0
41.7
Clearance between EY 15
stem and guide
EY20
I
~~~ ~
0.013
-
0.037
Spark plug
EY 15
1
EY20
NGK
BM4A
EY15
1
EY20
Adjust
or
replace
Spark gap
0.6
-
0.7
1
Spark timing
EY15
1
EY20
Timing
tester
f
2"
f
5"
Adjust
23"
before
T.D.C.
0.35
~
f
0.05
Contact
breaker
Point opening
I
E:;:
5
0.1
Adjust
-
46
-