Hunter 50 - Mechanical Propulsion Components; Propeller and Shaft Alignment

Hu
nt
e
r
50
•
U
nderwater
G
ea
r
6
.
2
U
nderwater Gear
Your underwater Gear consists of the followin
g:
P
ropulsion components
(
sail drive and bow thruster
)
S
teerin
g
components
S
eawater Intake, and dischar
g
e skin
f
ittin
g
s
M
onitorin
g
Equipmen
t
Keel
6.1 Mechanical Pro
p
ulsion Com
p
onents
DANGER
! !
K
eep clear of movin
g
parts at all times. Protect
m
ovin
g
parts from access durin
g
normal use.
P
ropulsion components are an
y
component that would
be involved in the movement of
y
our boat. This section
will detail the components that are submer
g
ed or under-
water most of the time. Fi
g
6.1 will detail most of the
c
om
p
onents
.
6.1.1 Pro
p
eller
s
The propeller supplied with
y
our boat has been select-
e
d as the best propeller for avera
g
e use. Propellers
use “pitch” or the an
g
le of the blades to determine
the amount o
f
power exerted
f
rom
y
our en
g
ines. Do
not chan
g
e the pitch of
y
our propellers without
g
et-
tin
g
y
our dealers recommendations first. If
y
ou chan
g
e
to a di
ff
erent propeller pitch, under no circumstances
•
•
•
•
•
use a propeller which allows the en
g
ine to operate
at a
high
er t
h
an recommen
d
e
d
RPM
.
Y
our en
gi
ne
manual will speci
fy
the maximum recommended RPM.
To maintain rated
p
ower,
p
ro
p
ellers should be free o
f
nicks, excessive pittin
g
and an
y
distortions that alter them
f
rom their ori
g
inal desi
g
n. Badl
y
dama
g
ed propellers
s
h
ou
ld
b
e re
pl
ace
d
,
b
ut t
h
ose t
h
at are c
hipp
e
d
,
b
ent or
merel
y
out o
f
shape can be reconditioned b
y
y
our marine
dea
l
e
r.
C
onsider keepin
g
an extra propeller on
y
our boat. I
f
the
propeller becomes dama
g
ed,
y
ou can replace it with the
spare and continue
y
our outin
g
. Check with
y
our dealer
i
f
y
ou want to purchase one
.
6.1.2 Pro
p
eller Shaf
t
The propeller sha
f
t is made o
f
Aquamet 19 or equivalent
s
t
ai
n
less
s
t
eel
w
hich
has
e
x
celle
nt
co
rr
osio
n r
esis
t
a
n
ce
and ver
y
hi
g
h stren
g
th. The couplin
g
at one end o
f
the sha
f
t
i
s
bo
lt
ed
t
o
th
e
tr
a
n
s
mi
ss
i
o
n. Th
e
o
th
e
r
e
n
d
of
th
e
s
h
af
t i
s
tapered, threaded, and ke
y
ed for installation of the propel-
ler. The propeller sha
f
t passes throu
g
h the hull encased
in the sha
f
t lo
g
. Then, on the underside o
f
the hull, is
attached a strut, which holds the
p
ro
p
eller shaft in
p
osition.
6.1.3 Ali
g
nmen
t
Ali
g
nin
g
the en
g
ine with the propeller sha
f
t is critical
f
or
smooth operation o
f
y
our boat.
S
ha
f
t ali
g
nment ma
y
c
han
g
e sli
g
htl
y
after
y
our boat is in use. Your dealer
should check ali
g
nment as part o
f
commissionin
g
, par-
ticularl
y
i
f
there is vibration, a drummin
g
sound, or loss
o
f RPM’
s
.
Below is an illustration showin
g
the steps
f
or
a
lig
nment,
h
owever we recommen
d
t
hi
s prac-
tice be performed by competent professionals.
y