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Yamaha F25A Service Manual

Yamaha F25A
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5-39
POWR
E
CRANKCASE, CRANKSHAFT ASSY., AND
CYLINDER BODY
Put a piece of Plastigauge
on each
main journal.
Install the other half of the bearings 1
into the crankcase.
Install the crankcase onto the cylinder
body.
Tighten the bolts in the proper
sequence and in two stages.
T
R
.
.
Bolt (M8):
1st: 15.0 Nm
(1.5 m • kg, 11.1 ft • lb)
2nd: 30.0 Nm
(3.1 m • kg, 22.1 ft • lb)
Bolt (M6):
1st: 6.0 Nm
(0.6 m • kg, 4.4 ft • lb)
2nd: 12.0 Nm
(1.2 m • kg, 8.9 ft • lb)
Remove the crankcase.
Measure the width of the compressed
Plastigauge
on each main journal.
Crankcase main journal color
code indicator a:
A: Blue
B: Black
C: Brown
Bearing color code b:
A: Blue
B: Black
C: Brown
NOTE:
Do not put the Plastigauge
over the oil
hole in the main journal of the crankshaft.
NOTE:
Align each bearing projection with the
notch in the crankcase.
Do not move the crankshaft until the
main-bearing oil clearance measure-
ment has been completed.
NOTE:
The crankcase color code indicator is
marked on the cylinder body as shown.
Use the same bearing color as the color
which is indicated on the crankcase
(e.g., A(Blue) Blue, etc.).

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Yamaha F25A Specifications

General IconGeneral
BrandYamaha
ModelF25A
CategoryOutboard Motor
LanguageEnglish

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