Yamaha F150A - Selecting the Crankshaft Journal Bearing

7-72
Crankcase
7. Install the crankcase “1”, and then tighten
the crankcase bolts “2” and “3” to the
specified torques in 2 stages and in the
order [1], [2], and so on.
TIP:
• Do not turn the crankshaft until the journal
oil clearance measurement has been com-
pleted.
• In the second tightening stage for the M10
bolts “2”, mark the M10 bolts and the crank-
case with identification marks “a”, and then
tighten the bolts 90° from the marks on the
crankcase.
8. Remove the crankcase, and then mea-
sure the width of the compressed Plasti-
gauge (PG-1) on each crankshaft
journal.
Selecting the crankshaft journal
bearing
When replacing the crankshaft journal bear-
ing, select the bearing as follows:
1. Check the crankshaft journal mark “a” on
the crankshaft and the cylinder block
mark “b” on the cylinder block.
Crankcase bolts “2” [1]–[4] (M10):
1st: 30 N·m (3.0 kgf·m, 22.1 ft·lb)
2nd: 90°
Crankcase bolts “3” [5]–[14] (M8):
1st: 14 N·m (1.4 kgf·m, 10.3 ft·lb)
2nd: 28 N·m (2.8 kgf·m, 20.7 ft·lb)
1
2
3
23
[1][2]
[4][3]
90q
[13]
[9]
[5]
[8]
[12]
[14]
[10]
[6]
[7]
[11]
a
Journal oil clearance:
0.021–0.046 mm (0.0008–0.0018 in)
P
J
J4
a
J2J1 J3 J4 J5
J1
J2
J3
J5