Yamaha F75F - Page 221

Crankcase
7-63
• Make sure that the protrusions “a” on the
connecting rod and connecting rod caps “1”
are facing toward the flywheel magneto end
of the crankshaft.
• In the second tightening stage for the con-
necting rod bolts “2”, mark the connecting rod
bolts and connecting rod cap with paint
marks “b”, and then
tighten the connecting
rod bolts 60 from the marks on the connect-
ing rod cap.
• After tightening the conn
ecting rod bolts “2”,
make sure that the crankshaft turns smooth-
ly.
9. Install:
• Dow
el pin
10. Install:
• Crankshaft journal bearing
• Thrust bearing
• O-ring
• Crankcase
• Crankcase bolt (M10)
• Crankcase bolt (M8)
a. Install the crankshaft journal bearings
“1” onto
the crankcase “2”.
b. Apply a thin, even layer of sealant onto
the mating surface of the crankcase.
• Install the crankshaft journal bearings “1” in
their original positions.
• Do not apply any sealant to the crankshaft
journal bearings “1”.
c. Install the thrust bearings “1”.
d. Install a new O-ring “1” and the crank-
case “2”, and then tighten the crank-
case bolts (M10) “3” to the specified
torque
s in 2 stages and in the order
[1], [2], and so on.
In the second tightening stage for the crank-
case bolts (M10) “3”, mark the crankcase bolts
(M10)
and the crankcase “2” with identification
marks “a”, and then tighten the bolts 60 from
the marks on the crankcase.
Connecting rod bolt “2”
1st: 13 N·m (1.3 kgf·m, 9.6 lb·ft)
2nd: 60
a
b
60°
1
2
T
R
.
.
New
1
2
1