Hamilton Jet HJ212, Инструкция по установке и обслуживанию

Страница: 48 / 198

Installation
Installation and Service Manual
Engine Cooling
Ensure that the engine cooling water pick up is not directly ahead of the jet unit intake,
but well to the side to avoid turbulent water flow into the jet.
The engine may be cooled conventionally or by making use of the inboard water offtake for the jet. The jet is
supplied with the water offtake plugged with a hosetail connection. The bung can be cut from the end of the
connection from which the cooling system can be plumbed. Refer to section: Water Offtake on page 3-9.
If shallow water operation is anticipated, a sandtrap should be installed in the cooling line to prevent sand
from clogging the cooling system. A sandtrap kit can be purchased from C.W.F Hamilton & Co Ltd. Refer to
drawing: 112110 Sandtrap.
It is common to use a heat exchanger and a separate cooling water circuit for the engine so that river or sea
water does not enter the engine. In this case the cooling water from the jet unit water offtake goes through
the heat exchanger circuit.
The water may be fed directly to the engine without the need for a raw water pump provided:

The pressure from the water offtake at idle is sufficient to cool the engine.

The engine can withstand the full pressure from the jet offtake.
Engine Systems
Engine wiring, instrumentation and throttle systems are all conventional - follow the manufacturer's
recommendations.
Exhaust Systems
Refer to section: Exhaust systems on page 3-10.
Optional Impeller Installation
Normally the jet unit will be supplied with the chosen impeller fitted.
If the turbo impeller is to be fitted, it fits in the same place as the standard impeller but its nose slides further
forward onto the mainshaft.
The turbo impeller is manufactured in two halves which are bolted together. There
should be no requirement to separate the two halves.
To install the impeller, Refer to section: Tailpipe Area Overhaul on page 9-22.
Installation of Control Equipment
Refer to drawing: HJ21207003 Reverse Assembly.
The reverse duct is operated from the hand controller at the helm, via a push-pull cable to the reverse latch
mounted on the jet unit. The latch is connected to the reverse tiller and linkages which actuate the reverse
duct through the transom.

To be sure of correct flow for engine cooling, a conventional water pick-up and the engine raw water
pump should be used.

The jet unit water offtake can be used for a deck cleaning hose but the pressure is not high enough to
be used for a fire hose.
5-10