TOHATSU MD 30B2 Service Manual page 162

Power Unit
4. Inspection of Piston Ring Side Clearance
1) Attach a piston ring to piston, and measure piston ring
side clearance. Replace piston ring if the clearance is
over specified value.
Piston Ring Tool :
P/N. 353-72249-0
Piston Ring Side Clearance :
Standard Value :
Top Ring
Second Ring
Third Ring
Functional Limit :
a Top Ring
b Second Ring
c Third Ring
5. Inspection of Piston Pin Hole
Measure piston pin hole inner diameter, and replace piston
if the inner diameter is over the limit.
Piston Pin Hole : Standard Value
17.00 mm (0.6693 in)
5-40
}
0.04 – 0.08 mm
(0.0016 – 0.0032 in)
}
0.10 mm
(0.0039 in)
c
b
a
TLD D30/40/50B2 2013