Hamilton Jet HJ241, Manual

Page: 67 / 202

5.7
5 INSTALLATION
5.6 D
RIVELINE AND
E
NGINE
I
NSTALLATION
HJ-241 / HSRX
Two swivel ended Tie Rods are used to interconnect
from the “Adjustable Tiller” fitted to the Center Jet to
“Adjustable Tillers” fitted to the outer Jets.
5.5.5 Centering the Jet(s) Steering
Before mounting the Cylinder or fitting the Steering
Tie Rod(s) (for multiple Jet applications), ensure that
all Nozzles are set to the “dead ahead” position and
temporarily clamp the Nozzles so that the Tillers
will not move from the dead ahead position.
5.6 DRIVELINE AND ENGINE
INSTALLATION
GENERAL:
The engine(s) should be located in a position that
will give the vessel the most suitable fore and aft
trim for the proposed boat speed. For semi-planing
and moderate planing speed craft it is likely that the
engine should be positioned well forward towards
amidships for best trim and thus speed. For very
high speed craft it is likely the engine should be
positioned aft, close to the Jet Unit, to obtain best
trim and speed. Follow the recommendations of the
boat designer in this regard or consult C.W.F.
Hamilton & Co Ltd.
DRIVESHAFT INSTALLATION:
Use a Double Universal Driveshaft with a slip joint
(sliding spline). Any axial float will be taken up in
the Driveshaft. Flywheel adaptors may be used to
match the driveshaft flange. Consult the Sections
on
JET MAINSHAFT ALIGNMENT and DESIGN
BASICS to get the engine location and shaft line
angle correct.
Consult C.W.F. Hamilton & Co. Ltd for an
Engineering Check of driveline proposals.
DRIVELINE COMPONENTS FOR DIESEL ENGINES:
The Driveline for a diesel engine installation will
require a flexible Coupling normally mounted on the
engine flywheel. It is essential that the Coupling is
sufficiently flexible to ensure that the slow speed
torsional vibration resonance point occurs below
engine idle RPM. The engine manufacturer will be
able to calculate the torsional coupling stiffness
required to achieve this.
5.6.1 Mounting the Engine
Mount the engine via mounting feet fixed to the
engine bearers. The feet and bearers do not have to
withstand the propulsion thrust load which is
transmitted from the Jet directly to the hull. Flexible
engine mounts will reduce vibration and noise but
these must be used in conjunction with a driveshaft
system which does not cause a radial or side load at
the jet coupling as the engine moves. Refer to
Section 3.4 Jet Mainshaft Alignment and also Section
3.3.3 Drive Shaft Options for recommended
driveshaft and engine installation angles.