Checking The Crankpin Oil Clearance - SELVA MARINE Kingfish 25 Service Manual

Crankshaft journal diameter a:
42.986–43.000 mm (1.6924–1.6929 in)
Crankpin diameter b:
32.993–33.000 mm (1.2989–1.2992 in)
Crankpin width c:
21.000–21.070 mm (0.8268–0.8295 in)
2. Measure the crankshaft runout.
Crankshaft runout: 0.035 mm (0.0014 in)

Checking the crankpin oil clearance

1. Clean the crankpin bearings, connecting
rod, connecting rod cap, and crankpin.
2. Install the crankpin bearings 1 into the
connecting rod a and connecting rod
cap b.
1
d
b
1
TIP:
• Install the crankpin bearings in the original
positions.
• Fit the protrusions c on the crankpin bear-
ings into the slots d in the connecting rod
a and connecting rod cap b.
3. Place a piece of Plastigauge (PG-1) onto
the crankpin e, parallel to the crank-
shaft.
a
d
c
TIP:
Do not place the Plastigauge (PG-1) over the
oil hole in the crankpin of the crankshaft.
4. Install the connecting rod a and con-
necting rod cap b onto the crankpin e,
and then tighten the connecting rod bolts
2 to the specified torques in 2 stages.
b
2
e
Connecting rod bolt 2:
1st: 6 N·m (0.6 kgf·m, 4.4 ft·lb)
2nd: 17 N·m (1.7 kgf·m, 12.5 ft·lb)
Cylinder block
e
a
f
E
7
7-60