Mechanical Propulsion Components - Hunter 50CC Operation Manual

Underwater Gear
Your underwater Gear consists of the following:
• Propulsion components (sail drive and bow thruster)
• Steering components
• Seawater Intake, and discharge skin fittings
• Monitoring Equipment
• Keel

6.1 Mechanical Propulsion Components

DA NGER
!
Keep clear of moving parts at all times. Protect
moving parts from access during normal use.
Propulsion components are any component that would
be involved in the movement of your boat.
6.1.1 Propellers
The propeller supplied with your boat has been select-
ed as the best propeller for average use. Propellers
use "pitch" or the angle of the blades to determine
the amount of power exerted from your engines. Do
not change the pitch of your propellers without get-
ting your dealers recommendations first. If you change
to a different propeller pitch, under no circumstances
use a propeller which allows the engine to operate
at a higher than recommended RPM. Your engine
manual will specify the maximum recommended RPM.
Fig. 6.1
shows the image of dripless stuffi ng box used
on your boat
Hunter 50 • Underwater Gear
CC
To maintain rated power, propellers should be free of
nicks, excessive pitting and any distortions that alter them
from their original design. Badly damaged propellers
should be replaced, but those that are chipped, bent or
merely out of shape can be reconditioned by your marine
dealer.
6.1.2 Propeller Shaft
The propeller shaft is made of Aquamet 19 or equivalent
stainless steel which has excellent corrosion resistance
and very high strength. The coupling at one end of the
shaft is bolted to the transmission. The other end of the
shaft is tapered, threaded, and keyed for installation of
!
the propeller. The propeller shaft passes through the hull
encased in the shaft log.
6.1.3 Alignment
Aligning the engine with the propeller shaft is critical for
smooth operation of your boat. Shaft alignment may
change slightly after your boat is in use. Your dealer
should check alignment as part of commissioning, par-
ticularly if there is vibration, a drumming sound, or loss
of RPM's.
Below is an illustration showing the steps for
alignment,
tice
6.1.4 Struts
Each propeller shaft is supported by manganese bronze
struts fastened to the bottom of the hull. The struts have
replaceable bearings to minimize wear and to protect
the shaft at the points where it passes through the strut
6.2
however we
be performed by y competent
recommend this prac-
professionals.
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