Yamaha F150B Service Manual - page 123
4-18
Troubleshooting the power unit
0
1
2
3
4
5
6
7
8
9
10
A
Symptom
1: PTT unit d
o
es not
hold the o
u
tboar
d
motor up.
T
roub
leshooting the lo
wer unit
— : Not app
licab
le
Symptom
1: Shift mec
h
anism o
f the f
o
rwar
d g
e
ar and re
ver
se g
e
ar does n
o
t operate p
roperl
y
.
Sym
p
to
m
2
C
au
se
1
C
a
u
s
e
2
C
he
c
k
in
g
ste
p
Ref
e
r to
pa
ge
—
M
an
u
a
l v
a
lv
e op
ene
d
M
an
ua
l v
a
lv
e malf
un
ctio
n
C
hec
k t
he ma
n
ual v
a
lv
e
.
—
Ins
uf
ficie
n
t PT
T
flu
id
—
Ad
d
su
ffic
ien
t f
luid
.
—
P
T
T
flu
id leaka
g
e
—
Chec
k t
he h
y
dr
aulic pr
essure
.
—
Clo
gge
d f
luid pa
ssa
g
e
—
Dis
as
semb
le
and chec
k the PTT unit.
Sym
p
to
m
2
C
au
se
1
C
a
u
s
e
2
C
he
c
k
in
g
ste
p
Ref
e
r to
pa
ge
—
Sh
ift
ro
d op
er
a
tio
n malf
un
ctio
n
S
h
ift
ro
d co
nn
ectio
n
mal
-
fun
c
ti
on
Chec
k t
he de
te
nt
.
Che
c
k
th
e
shif
t rod
co
n-
ne
ct
ion
.
—
Sh
ift
mech
anism ma
lfu
n
cti
on (i
n lo
w
e
r
u
n
it
)
—
Dis
as
semb
le
and chec
k the lo
w
e
r unit.