Engine Checks (Vessel Moored) - Hamilton Jet HJ212 Installation And Service Manual

Appendix

Engine Checks (Vessel Moored)

Item Check
1 The marine bearing (cutless bearing) must operate wet unless the
optional dry run kit has been fitted (dry run kit available for HJ-212 to
HJ-364 jet units only).
For a jet unit fitted with a dry run kit, the following applies:

exceeding 1000rpm. Minimum time between dry runs of 1 hour.

water, or with the vessel ballasted such that the jet unit does not
prime (pump water properly) when the engine is started.
For jets specified with a water feed system for the water seal and
marine bearing (specified on jets where the mainshaft is above the
static waterline, typically on multi-jet monohulls with high deadrise),
check that water is being supplied to the water seal and marine
bearing before running the jet unit.
2 Ensure the vessel is securely moored fore and aft and in deep clean
water.
3 With the reverse controls set to "zero speed", the engine(s) may be
started and the engine suppliers representatives can carry out engine
checks.
4 If the engine cooling water is taken from the jet unit offtake, confirm
that water is coming out of the engine exhaust outlets where
possible. Periodically check that the engine is running at the correct
operating temperature. Check that the cooling water hoses are
secure.
5 If the vessel is equipped with HSRC or HYRC and the pressure alarm
sounds, immediately shut the engine off and refer to the controls
product manual to check adjustments. Failure to immediately shut
down the engine may result in serious damage to the hydraulic pump
due to overheating.
6 Check for water leaks around the jet unit while the engine is running
particularly under the bearing housing (mainshaft water seal).
7 Check that the jet unit and driveshaft are running smoothly (no
vibration).
8 Periodically check the bearing housing temperature. The temperature
should not exceed 80ºC. On multi-jet installations, all bearing
housings should be at a similar temperature.
9 Check that the reverse controls are working by monitoring the reverse
duct position while moving the reverse control lever(s).
10 Check that the steering controls are working by monitoring steering
nozzle position while moving the helm (check that port helm gives
port nozzle deflection, starboard helm gives starboard nozzle
deflection and that all nozzles are steering in the same direction).
11 Check that steering travel is limited by the hydraulic steering cylinder
and not the steering linkage (for jet units fitted with steering cylinders
and linkages).
12 After stopping the engine, check the main bearing and JHPU oil levels
and replenish if required.
Maximum dry run time of 3 minutes with engine speed not
Do not operate the standard jet unit with the vessel out of the
Failure to check cooling water hoses may result in flooding
of the vessel.
10-20
Installation and Service Manual
Completed
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