Checking The Crankshaft Main Journal Oil Clearance - Yamaha F15B Service Manual

POWR
NOTE:
Do not turn the connecting rod until the crank
pin oil clearance measurement has been
completed.
Connecting rod bolt:
1st: 10 N·m (1.0 kgf·m, 7.2 ft·lb)
2nd: 22 N·m (2.2 kgf·m, 16 ft·lb)
5. Remove the connecting rod cap and
measure the width of the compressed
Plastigauge ® (PG-1) on each crank pin.
Replace the connecting rod.
Crank pin oil clearance:
0.021–0.045 mm
(0.0008–0.0018 in)
Checking the crankshaft
main journal oil clearance
1. Clean the bearings, main journals, and
bearing portions of the crankcase and
cylinder body.
2. Place the cylinder body upside down on
a bench.
3. Install half of the bearings 1 and the
crankshaft 2 into the cylinder body 3.
a
5-43
Power unit
6D451370
3
2
1
6D451300
cC
Install the bearings in their original posi-
tions.
NOTE:
Insert the projection a of the bearing into the
notch in the cylinder body.
4. Put a piece of Plastigauge
each main journal parallel to the crank-
shaft.
NOTE:
Do not put the Plastigauge
oil hole in the main journals of the crankshaft.
5. Install the remaining half of the bearings
into the crankcase.
NOTE:
Insert the projection of the bearing into the
notch in the crankcase.
6. Install the crankcase onto the cylinder
body and apply engine oil onto the
threads of the crankcase bolts.
® (PG-1) on
6D451310
® (PG-1) over the
6D45F11