Post Launch Checks; Engine Running Checks (Vessel Moored) - Hamilton Jet HJ212 Installation And Service Manual

Commissioning

Post Launch Checks

Before starting the engines, check the following:
There are no water leaks:

At the transom seal.

At the intake base.

Visually check for water leaks from under the bearing housing

The waterline is at least up to the mainshaft centreline so the jet unit will prime (pump water properly)

when the engine is started.
Make sure the vessel is securely moored in deep water and well clear of other objects or craft.


Engine Running Checks (Vessel Moored)

The marine water bearing must operate wet. Do not operate the jet unit with the vessel out
of the water, or with the vessel ballasted such that the jet unit does not prime (pump water
properly) when the engine is started.
With the reverse lever set to zero speed, the engine(s) may be started and the engine supplier's

representatives can carry out engine checks.
If the engine cooling water is taken from the jet unit water offtake, confirm that water is passing out of

the engine exhaust outlets, where possible. Periodically check that the engine is running at the correct
operating temperature as this ensures that the engine is receiving sufficient water from the jet unit
water offtake. Check that the cooling water hoses are secure.
Failure to check cooling water hoses may result in flooding of the vessel.
Check for water leaks around the jet unit while the engine is running particularly under the bearing

housing (mainshaft water seal).
Check that the jet unit and driveshaft are running smoothly (no vibration).

Periodically check the bearing housing temperature. The bearing housing operating temperature should

not exceed 80º C.
Check that the reverse controls are working by monitoring the reverse duct position while moving the

reverse control lever(s).
Check that the steering controls are working by monitoring the steering nozzle position while moving the

helm (check that port helm gives port nozzle deflection, and that all nozzles are steering in the same
direction).
Check that the steering travel is limited by the tiller stops fitted to the transom, Refer to drawing:

HJ21206000 Steering Assembly.
6-2
Installation and Service Manual