Selecting The Connecting Rod Bearing; Checking The Crankshaft Journal Oil Clearance - SELVA MARINE Blue Whale 250 EFI Service Manual

POWR

Selecting the connecting rod bearing

1. When replacing the connecting rod bear-
ing, select the suitable bearing as fol-
lows.
2. Check the crankpin mark a on the
crankshaft.
3. Select the suitable color b for the con-
necting rod bearing from the table.
Crankpin mark a
92–00
84–91
76–83
Checking the crankshaft journal oil
clearance
1. Clean the bearings, crankshaft journals,
and bearing portions of the crankcase
and cylinder block.
5-63
Power unit
Bearing color b
Yellow
Green
Blue
2. Place the cylinder block upside down on
a bench.
3. Install half of the main bearings 1 and
the crankshaft 2 into the cylinder block
3.
NOTE:
• Install the bearings in their original posi-
tions.
• Insert the projection a of each bearing into
the slots in the cylinder block.
4. Put a piece of Plastigauge (PG-1) on
each crankshaft journal parallel to the
crankshaft.
NOTE:
Do not put the Plastigauge (PG-1) over the
oil hole in the main journals of the crankshaft.
5. Install the remaining half of the main
bearings into the crankcase.
NOTE:
• Install the bearings in their original posi-
tions.
• Insert the projection a of each bearing into
the slots in the crankcase.
6P23H11