Preservation (Post Installation); Servicing Intervals - Hamilton Jet HJ212 Installation And Service Manual

Maintenance

Preservation (Post Installation)

Do not run the jet unit out of the water unless it is fitted with a dry run kit or forced
water lubrication system.
When the vessel is not operational for an extended period, the following procedures must be followed to
prevent marine growth and corrosion problems.
If the jet unit is to be laid-up, carry out the following.
Clean down the whole jet unit and wash inside and out with fresh water.

Hose the inside of the jet through the intake grill and the nozzle. Allow to dry completely.

Spray with a suitable corrosion protection oil such as Shell Ensis.

Oil and lubricate all moving parts.

If the jet is to remain moored, carry out the following:-
Actively prevent marine growth through the following procedures:

Paint the inside and outside of the jet unit with antifouling compound.

Keep light away from the jet unit.

Moor in deep water.

Place an opaque cover over the steering nozzle to stop light entering the inside of the jet unit.

In shallow water an opaque cover should be fitted over the intake screen.

Do the following at an interval ranging from 1 week to 1 month.
Rotate the mainshaft through several revolutions once a week. Can be done manually if the engine

cannot be started.
Every month, move the reverse duct and steering nozzle fully six times. Leave the reverse duct in the

raised position and the steering push rod fully retracted.
Before moving any controls, ensure that any marine growth is removed from the steering and
reverse linkage rods. This will prevent damage to the seals that the rods pass through.

Servicing Intervals

Vessel usage is assumed to be 1000 operational hours per year.
The frequency of the following service items may be varied to suit actual
operating conditions.
Examine the inside of the jet unit after the first 6 months or 500 hrs operation and thereafter every 12

months or 1000 hrs.
This examination should be done with the vessel out of the water.
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Installation and Service Manual