Home' Ausmarine : October 2014 Contents Yanmar re-powers harbour commuter ferries
Rarely does a single commercial vessel go through such a
transformation as the 'Harbour Cat', operated by Auckland
ferry company Fullers in New Zealand.
Constructed and launched as an 18-metre ferry, the 'Harbour
Cat' worked across various waterways in New Zealand until she
wound up in the Fullers Auckland commuter fleet. Somewhere in
her chequered past, the vessel was lengthened by two metres and
re-powered. But with the lingering effects of that renovation long
since worn off, modern Auckland commuters were beginning to
regard her as a noisy and Spartan experience.
Fullers Auckland withdrew the 'Harbour Cat' vessel from the
commuter run and handed her over to the team at Oceania
Marine for a complete refit. This began at the keel and worked all
the way through the vessel.
GIVING A CAT NEW CLAWS
Having already undertaken a refit to the Fullers ferry 'Tiger
Cat', which was also installed with the same Yanmar 6HY-WET
series engines, Fullers' 'Harbour Cat' received a very similar
makeover and overhaul treatment. This involved ripping out all
machinery, the removal of everything in the engine room, and
the removal of the air conditioning systems, carpet, seating,
steering system, and even the glass-in cabins. Structural repairs
were then executed, while air intakes and exhausts were
In the 'Harbour Cat's' engine room, a fresh pair of Yanmar
6HY-WET marine diesels was fitted. A purpose-built commercial
grade marine engine, Yanmar's 6HY-WET model includes
Yanmar's latest combustion chamber design. Named ASSIGN, this
system was originally pioneered by Yanmar on its range of large
bore, low-speed propulsion engines.
When combined with Yanmar's own mechanical fuel system,
the ASSIGN technology delivers impressive fuel c onsumption
results and provides commercial operators with very good fuel
savings over a vessel's remaining service life.
According to Power Equipment, the official distributor of
Yanmar engines to Australia and New Zealand, the twin-turbo
441kW at 2,100rpm Yanmar 6HY-WET engine model is the ideal
variant for operators that require an engine to run at full throttle
for extended periods. With the cylinder head featuring a quad
valve design, the Yanmar 6HY-WET excels in this configuration
and in conditions demanding continuous commercial use.
In regards to the 'Harbour Cat' overhaul, the two engines were
then each coupled to conservatively rated 500-series ZF reduction
transmissions, as well as hooked up to five-blade counter-rotating
Tiger propellers. As part of the propulsion makeover, the
'Harbour Cat' also received a completely new driveline.
Commenting on the results of the refit, Power Equipment said
that whereas the old 'Harbour Cat' was not the most popular vessel
amongst commuters, post re-fit she is a "totally different beast".
"The twin Yanmar marine diesels emit a dete r mined gro wl
from the engine room, but the on-board noise levels are a marked
improvement on the previous engines and the engine room fit
out," said the company.
"The new Yanmar 6HY-WET marine diesels in their white
livery look the part in a sparkling new engine room. Once fired
up, this cat is ready to pounce. Easing the throttles forward, the
Yanmar engines punch out 441kW a side, quickly pumping the
'Harbour Cat' up to a service speed of 23 knots.
"Post re-fit, the once-tired commuter ferry is now smart and
well presented. The skipper, Lane Van der Linden, also rates the
vessel as easy to operate."
With the extensive re-fit program completed, the vessel's
service life has now been significantly extended, thus proving the
"half life" refit concept as a practical and economic option for
lengthening the service of hard-working vessels that typically put
in up to 4,000 hours a year, said Power Equipment.
While the Yanmar engines have played their part in the
transformation of the 'Harbour Cat', the all-embracing re-fit
program has demonstrated that the commercial life of a vessel
can be greatly extended. The extensive application of new, high
quality replacement marine equipment means that Fullers of
Auckland have two fully refurbished vessels destined to operate
efficiently for many years to come.
For further information contact:
Power Equipment, Victoria.
34 October 2014 AUSMARINE
The overhaul and repower of the 18-metre Auckland ferry 'Harbour
Cat' included the removal of all machinery and interior furnishings,
followed by structural repairs, exhaust system replacement, and the
fitting of two Yanmar 6HY-WET engines
441kW @ 2,100rpm variants of the Yanmar 6HY-WET engine were
chosen for the 'Harbour Cat' repower
Links Archive September 2014 November 2014 Navigation Previous Page Next Page