Hamilton Jet HJ212, Installation And Service Manual

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Maintenance
Installation and Service Manual
Salt Water Operation
The HJ212 jet unit is designed as a trailered craft and is not intended to be moored in the sea. It can be used
freely in the sea, but the vessel should be slipped or trailered and flushed with fresh water or given a short
run in fresh water before storage. It is good practice to carry out the above after any period of operation in
salt water.
If the vessel is used extensively in salt water, it is recommended that all casings and seals be inspected after
every 30 hours of use. Annually dismantle and inspect all internal and external surfaces for corrosion,
particularly inspect the mainshaft around the water seal and bearing. Rubber seals such as the transom seal
should be replaced when required.
Jet surface coating procedure
Introduction and scope
The purpose of this procedure is to outline the correct method for applying surface coatings to Hamilton
water jets. This procedure covers the following:

Application of antifoul coatings to new jets.

Repairing/refurbishing paint on aluminium components.

Repairing/refurbishing paint on steel and stainless steel components.
In all instances, it is necessary to read the paint manufacturers documentation regarding paint application.
The paint manufacturer’s documentation provides information such as paint compatibility, paint
thickness/coverage, drying times, recoat times, application method, and safety precautions.
This procedure does not define factory production processes for paint application (refer to drawing 111178
for production process), however this procedure is applicable for production surface coating repair
processes.
Application of Antifoul Coatings
Application of Antifoul over Grey Gloss
Trilux antifoul is not normally applied over the grey gloss, as jets are available ex-factory with the antifoul
applied to the wetted surfaces. The antifoul requires an epoxy tie coat, and it is not recommended to apply
this tie coat to the grey gloss as the epoxy is not compatible with the polysiloxane based technology used for
grey gloss. It is therefore necessary to remove the grey gloss, which is a difficult process due to its high
durability. If it is necessary to apply antifoul over grey gloss then use the following process:

Sand to remove the grey gloss. If the surface is sanded through to bare metal then repair as per "Bare
Metal Refurbishment" below.

Apply a tie coat of Interprotect, or alternatively Intergard 263 or Intercure 200 if Interprotect is
unavailable. Masking of the impeller and mainshaft is optional as it is acceptable to have overspray on
the mainshaft and impeller.

Apply antifoul. Up to three layers of Trilux antifoul may be applied; and any further coats do not offer
better fouling protection.
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