Inspection Of Piston Pins - TOHATSU MFS25 Service Manual

Power Unit

29) Inspection of Piston Pins

1. Measure piston pin outer diameter. Replace piston pin if
outer diameter is less than specified value.
Piston Pin Outer Diameter : Standard Value
16.00 mm ( 0.6299 in )
Functional Limit :
15.97 mm ( 0.6287 in )
Measure piston pin boss inner diameter a.
2.
3. Obtain clearance between piston pin and pin boss. Replace
piston pin or piston if the clearance is over specified value.
Clearance Between Piston Pin and Pin Boss :
0.002 to 0.012 mm ( 0.00008 to 0.00047 in )
Functional Limit :
0.040 mm ( 0.00157 in )
30) Inspection of Connecting Rod Small
End Inner Diameter
Measure connecting rod small end inner diameter a.
1.
Replace connecting rod if the diameter is over specified
value.
Connecting Rod Small End Inner Diameter a : Standard Value
16.01 mm ( 0.6303 in )
Functional Limit :
16.04 mm ( 0.6315 in )
31) Inspection of Connecting Rod Big
End Side Clearance
Measure connecting rod big end side clearance a. Replace
1.
connecting rod and/or crankshaft if the clearance is over
specified value.
Connecting Rod Big End Side Clearance a :
0.10 to 0.25 mm ( 0.0039 to 0.0098 in )
Functional Limit :
0.60 mm ( 0.0236 in )
5-48
a
a
a
25/30 2006