Yamaha F350B - Checking the Journal Oil Clearance

7-83
Cylinder block
Checking the journal oil clearance
TIP:
• After checking the journal oil clearance,
check the crankcase bolts. See “Checking
the crankcase bolt” (7-78).
• Clean the mating surfaces of the parts in ad-
vance.
1. Install:
• Crankshaft journal bearing “1”
• Crankshaft “2”
(into the cylinder block “3”)
TIP:
Install the crankshaft journal bearings “1” in
their original positions.
2. Install:
• Plastigauge (PG-1) “1”
Do not place the Plastigauge (PG-1) over
the oil hole in each crankshaft journal.
TIP:
Place a piece of Plastigauge (PG-1) “1” onto
the crankshaft journal, parallel to the crank-
shaft.
3. Install:
• Crankshaft journal bearing
(into the crankcase)
TIP:
Install the crankshaft journal bearings in their
original positions.
4. Install:
• Crankcase “1”
a. Tighten the crankcase bolts (M10) “2” and
“3” to the specified torques in 2 stages and
in the order [1], [2], and so on.
b. Tighten the crankcase bolts (M8) “4” to the
specified torques in 2 stages and in the or-
der [17], [18], and so on.
TIP:
• When checking the oil clearance, reuse the
removed crankcase bolts.
• Do not turn the crankshaft until the journal oil
clearance measurement has been complet-
ed.
• In the second tightening stage for the crank-
case bolts (M10) “2” and “3”, mark the crank-
case bolts (M10) and the crankcase with
identification marks “a”, and then tighten the
bolts 90° from the marks on the crankcase.
3
2
1
1
1
4
2
3