Hunter 50CC - Operations and Maintenance

Hu
nt
e
r
50
CC • En
g
ines and Transmissions
11.4
c
orrected
.
For in
f
ormation on the correct levels
f
or en
g
ine runnin
g
,
please consult
y
our en
g
ine owner’s manuals
f
rom the
e
n
g
ine manufacturer in
y
our owner’s packet.
Important: The Hour meter will run if you leave the ignition
switch on when the engine is not running. This unnecessarily
increases the number of engine hours.
Note: Instruments have a tolerance for accuracy. In addition,
each engine may operate at differing values at the same RPM.
As long as the instruments are reading within the proper operat-
ing range, the engine is operating properly.
1
1.1.4 En
g
ine Coolin
g
Th
ere are two separate s
y
stems t
h
at coo
l
y
our en
gi
nes.
The raw water coolin
g
s
y
stem is described in detail in
y
our
“
Water
Sy
stems”
(
section 9
)
o
f
this manual. The
i
nterna
l
en
gi
ne coo
li
n
g
s
y
stem
i
s supp
li
e
d
by
t
h
e en
gi
ne
manu
f
acturer. This s
y
stem
f
eatures a closed anti
f
reeze
c
oolant bottled in a reservoir attached to the en
g
ine.
C
oolant is circulated throu
g
h the en
g
ine in separate
c
hannels than the raw water coolin
g.
Note: Be sure the engine seacocks are open before you start
the engine. Failure to open them will cause damage to the
water pump impeller.
DA NG ER
! !
burns or other personal in
j
ur
y
when pressure cap is
r
emoved. Allow en
g
ine to cool. Open pressure cap
slowl
y
to allow pressure to vent before removin
g
cap.
1
1.1.5 Emer
g
enc
y
Equipmen
t
Your en
g
ines are set up to operate under the tou
g
hest
c
on
di
t
i
ons.
H
owever, s
h
ou
ld
t
h
e o
il
pressure
b
ecome
too low, or the en
g
ine overheat, alarms will sound at
th
e
h
e
lm. Th
e
r
e
a
r
e
se
v
e
r
a
l
co
n
d
iti
o
n
s
th
a
t will
sou
n
d
an alarm and save
y
ou from dama
g
in
g
y
our en
g
ines.
Be sure and stud
y
y
our documentation supplied b
y
the
e
n
g
ine manu
f
acturer to ensure
y
ou will know what the
a
l
arm means s
h
ou
ld
one soun
d
on
y
our
b
oat.
11.2 Transmission
s
Th
e transm
i
ss
i
on
h
as a re
d
uct
i
on
g
ear w
hi
c
h
d
r
i
ves
the propeller at a slower rotation speed than that o
f
the
e
n
g
ine.
C
onsult
y
our
O
EM manual
f
or complete transmission
in
fo
rm
a
ti
o
n.
11.3 O
p
erations and Maintenanc
e
In the Underwa
y
Chapter,
(
Chapter 12
)
y
ou will find
i
nstruct
i
ons on start
i
n
g
y
our en
gi
nes.
Al
so
d
eta
il
e
d
i
n t
h
e
manu
f
acturer’s documentation supplied with
y
our boat,
y
ou will find instructions on maintenance items that
y
ou
ma
y
perform
y
ourself. Should
y
ou have an
y
questions
re
g
ardin
g
maintenance or operations not provided, be
sure and consult
y
our boat dealer.
Important: Shift the transmission only when the engine speed
is at or below 1000 rpm. Shifting at higher engine speeds could
severely damage the boat, the transmission, and the engine.
Allow the transmission to remain in neutral for a few seconds
before reversing the rotation of the propeller.
Fi
g
. 11.
4
(1)
(2)
(6)
(5)
(3)
(4)
1 – Coolant Tank (Heat Exchanger)
2 – Coolant Pump (Fresh Water)
3 – Seawater Drain from Seawater
Pump Cover
4 – Coolant Drain Cock
5 – Intercooler
6 – Seawater Drain from Seawater
Pump Cover
1
1.3.1 H
y
drolock
Hyd
ro
l
oc
k
i
s cause
d
by
water enter
i
n
g
t
h
e en
gi
ne c
yli
n-
ders throu
g
h the exhaust. The
f
ollowin
g
conditions can
c
ause h
y
drolock.