Inspection Of Crank Shaft - TOHATSU MFS 9.9 Owner's Manual

Power Unit

35) Inspection of Crank Shaft

Measure crankshaft journal outer diameter a and crank pin
1.
outer diameter b. Replace crankshaft if either outer
diameter is less than specified value.
Crankshaft Journal Outer Diameter a : Standard Value
35.99 mm (1.4169 in)
Crank Pin Outer Diameter b : Standard Value
29.98mm (1.1803 in)
Functional Limit :
Crankshaft Journal Outer Diameter a :
Replace if less than 35.97 mm (1.4161 in).
Crank Pin Outer Diameter b :
Replace if less than 29.95mm (1.1791 in).
2. Measure crankshaft runout. Replace crankshaft if runout is
over specified value.
Crankshaft Runout Limit :
0.05 mm (0.0020 in)
3. Use commercially available thickness gauge to measure
side clearance.
Side Clearance :
0.1 - 0.3 mm (0.004 - 0.012 in)
Functional Limit :
0.6 mm (0.024 in)
If side clearance is over specified value, measure crank case
(cylinder side) width d and crankshaft width c, and replace
the part of which width is out of specified range.
Crankshaft Width c : Standard Value
126.8 - 126.9 mm (4.992 - 4.996 in)
Crank Case Width d : Standard Value
127.0 - 127.1 mm (5.000 - 5.004 in)
5-46
a
b b
c
d
4st 9.9/15/20 2008
a