Rotax 912 i Series Maintenance Manual page 220

Current measurement
Description
1) Piston
Piston, red PI01 83.988 mm
84 mm / 3.3066 in.
3.3 in.
Piston, green PI01 83.998 mm
84 mm / 3.3070 in.
3.3 in.
Installation CY01 0.000 mm
clearance, /PI01 0.0000 in.
cyl. "A" with
"red" piston
Installation CY01 0.000 mm
clearance, /PI01 0.0000 in.
cyl. "B" with
"green" pis-
ton
Piston pin PI02 20.001 mm
bore 0.7874 in.
Piston pin PI03 19.992 mm
0.7871 in.
Piston pin PI01/ 0.006 mm
clearance in PI02 0.0002 in.
piston pin
bore
Piston pin CS06 0.015 mm
clearance in /PI03 0.0006 in.
conrod
Backlash bet- PI04 0.030 mm
ween piston 0.0012 in.
ring groove
and rectangu-
lar piston ring
1
Backlash bet- PI05 0.030 mm
ween piston 0.0012 in.
ring groove
and conical
compression
ring 2
Effectivity: 912 i Series
Edition 1/Rev. 0
BRP-Powertrain
MAINTENANCE MANUAL
Tolerance
value
min max 100 %
84.002 mm 83.890 mm
3.3072 in. 3.3027 in.
84.012 mm 83.890 mm
3.3075 in. 3.3027 in.
0.024 mm 0.130 mm
0.0009 in. 0.0051 in.
0.026 mm 0.130 mm
0.0010 in. 0.0051 in.
20.005 mm 20.040 mm
0.7876 in. 0.7890 in.
19.995 mm 19.970 mm
0.7872 in. 0.7862 in.
0.013 mm 0.050 mm
0.0005 in. 0.0020 in.
0.035 mm 0.050 mm
0.0014 in. 0.0020 in.
0.062 mm 0.100 mm
0.0024 in. 0.0039 in.
0.062 mm 0.100 mm
0.0024 in. 0.0039 in.
Tolerance
limit limit
50 %
83.939 mm current
3.3047 in. replaced
83.944 mm current
3.3049 in. replaced
0.077 mm current
0.0030 in. replaced
0.078 mm current
0.0031 in. replaced
20.023 mm current
0.7883 in. replaced
19.981 mm current
0.7867 in. replaced
0.032 mm current
0.0012 in. replaced
0.043 mm current
0.0017 in. replaced
0.081 mm current
0.0032 in. replaced
0.081 mm current
0.0032 in. replaced
Measurements
Cyl. Cyl. Cyl. Cyl.
1 2 3 4
72-30-10
Page 12
July 01/2012