Yamaha F50D Servise Manual page 190

POWR
TIP:
Do not put the Plastigauge (PG-1) over the
oil hole in the crankshaft journal.
4. Install the remaining half of the bearings
into the crankcase.
TIP:
Install the protrusion of the bearing into the
groove in the crankcase.
5. Install the crankcase 4 onto the cylinder
block and apply engine oil onto the
threads of the crankcase bolts 5 and 6.
6. Tighten the crankcase bolts 5 and 6 to
the specified torques in 2 stages and in
the sequence numbers ( ,
5
6
5
6
6
5 5
7-49
Power unit
, ···).
4
6
4
Crankcase bolt (M8) 5:
1st: 15 N·m (1.5 kgf·m, 11.1 ft·lb)
2nd: 30 N·m (3.0 kgf·m, 22.1 ft·lb)
Crankcase bolt (M6) 6:
1st: 6 N·m (0.6 kgf·m, 4.4 ft·lb)
2nd: 12 N·m (1.2 kgf·m, 8.9 ft·lb)
TIP:
Do not turn the crankshaft until the journal oil
clearance measurement has been com-
pleted.
7. Remove the crankcase 4 and measure
the width of the compressed Plastigauge
(PG-1) on each journal. Replace the
bearing if out of specification.
Crankshaft journal oil clearance:
0.012–0.036 mm (0.0005–0.0014 in)
5
6