Hunter H33 - Underwater Gear Overview; Mechanical Propulsion Components; Propellers; Propeller Shaft

Hu
nt
e
r
33
•
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
w
ill
d
eta
il
t
h
e components t
h
at are su
b
mer
g
e
d
or un
d
er-
water most o
f
the time. Fi
g
6.1 will detail most o
f
the
c
omponents
.
6.1.1 Propeller
s
Th
e prope
ll
er supp
li
e
d
w
i
t
h
y
our
b
oat
h
as
b
een se
l
ect-
e
d as the best propeller
f
or avera
g
e use. Propellers
use “pitch” or the an
g
le of the blades to determine
the amount of power exerted from
y
our en
g
ines. Do
not chan
g
e the pitch o
f
y
our propellers without
g
et-
tin
g
y
our dealers recommendations first. If
y
ou chan
g
e
to a different
p
ro
p
eller
p
itch, under no circumstances
use a propeller which allows the en
g
ine to operate
•
•
•
•
•
at a hi
g
her than recommended RPM. Your en
g
ine
manual will specif
y
the maximum recommended RPM.
To maintain rated power, propellers should be
f
ree o
f
n
i
c
k
s, excess
i
ve p
i
tt
i
n
g
an
d
an
y
di
stort
i
ons t
h
at a
l
ter t
h
em
f
rom their ori
g
inal desi
g
n. Badl
y
dama
g
ed propellers
should be replaced, but those that are chipped, bent or
merel
y
out of shape can be reconditioned b
y
y
our marine
dea
l
e
r.
C
onsider keepin
g
an extra propeller on
y
our boat. If the
propeller becomes dama
g
ed,
y
ou can replace it with the
spare and continue
y
our outin
g
.
C
heck with
y
our dealer
if
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
a
inl
ess
s
t
ee
l whi
c
h h
as
e
x
ce
ll
e
nt
co
rr
os
i
o
n r
es
i
s
t
a
n
ce
and ver
y
hi
g
h stren
g
th. The couplin
g
at one end of the shaft
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
f
or installation o
f
the propel-
ler. The propeller shaft 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 propeller sha
f
t in position.
6.1.3 Ali
g
nmen
t
Ali
g
nin
g
the en
g
ine with the propeller shaft is critical for
smooth operation o
f
y
our boat.
S
ha
f
t ali
g
nment ma
y
c
han
g
e sli
g
htl
y
a
f
ter
y
our boat is in use. Your dealer
should check ali
g
nment as part of commissionin
g
, par-
ticularl
y
i
f
there is vibration, a drummin
g
sound, or loss
of
RPM’
s
.
Below is an illustration showin
g
the steps
f
or ali
g
nment,
however we recommend this practice be per
f
ormed b
y
c
ompetent professionals.
Fi
g
. 6.
1
Fi
g
. 6.
2