Home' Ausmarine : March 2010 Contents Suzuki has announced the launch of two
new fuel-efficient and high performance
four stroke outboard motors -- the new
generation DF40A and DF50A.
The new models were unveiled at the
Miami International Boat Show and boast a
host of technical features that combine to
give them increased fuel efficiency and
performance, while weighing less and
fitting more compactly on the transom -- all
of which are qualities in much demand.
Starting is a breeze, with Suzuki's Easy
Start System. Turn the key once and the
engine automatically turns over, coming to
life at the user's command. Once
underway, Suzuki's advanced "Lean Burn
Control" technology takes full advantage of
sensors monitoring engine performance
and ambient environmental conditions.
Using this input, the Lean Burn Control
accurately predicts engine needs to provide
the fuel injection system with just the right
mixture of air and fuel, delivering optimal
According to Suzuki, initial tests have
shown that these two new generation
outboards use 23 percent less fuel than the
current 40 and 50 models, mainly in the
cruising range, which is where the engine is
used for the majority of the time.
Both of these new outboards are based
on Suzuki's proven in-line, three-cylinder,
dual overhead cam (DOHC) 12-valve
engine with a highly efficient air intake
system which comes into effect in the high
rpm range. With 941cm3 of displacement,
multi-point sequential electronic fuel
injection, these engines respond quickly
and confidently to every move of the
throttle, particularly when accelerating
from cruising speeds.
All of this technology apparently
combines to provide quiet and efficient
operation as well as exhilarating performance.
For example, the Suzuki engineers report that
the new DF50 is six percent faster in their top
speed and 26 percent quicker in acceleration
than the current Suzuki models.
When designing these new engines,
Suzuki's engineers are also said to have paid
close attention to durability. Internal oil
flow is more efficient, keeping moving
parts better lubricated while using less
energy. These new engines also feature
Suzuki's maintenance-free, oil-bathed
timing chain, designed to give owners years
of dependable service. This is the first time
this feature has ever been offered in the
30kW and 37kW class.
The compact size and light weight of the
new DF40 and DF50 make them an ideal
power match for a wide variety of boats,
including; fishing boats, small RIBs and
According to Greg Haines, of Haines
Suzuki Marine, "Suzuki are always moving
forward and continuing to develop our
product range to meet the needs of our
customers. With these two new models
Suzuki is bringing serious advantages in
fuel-efficiency and performance to a key
sector of the Australian and New Zealand
The new engines should reach
Australian and New Zealand shores around
For further information contact:
Haines Suzuki Marine, Queensland.
Suzuki's fuel-efficient, high performance, new generation DF40A/DF50A
The new Suzuki DF40A
Operating a recreational dive charter
boat business from the idyllic Mission
Beach coastal village in far north
Queensland is no less demanding an
operation than a commercial fisherman
operating in Bass Strait.
Indeed the pressure on Andy Wright at
Calypso is unrelenting, year round. His
boat 'Calypso II' goes to sea 300 days a
year with an average of 35 people on board
each trip. That equates to a passenger list
of over 10,000 passengers every year
heading out to dive or snorkel on the
Outer Barrier Reef.
Now, thanks to a new pair of purpose
built Yanmar 6HYM-ETE commercial
marine engines, Andy can sleep more
comfortably at night secure in the
knowledge that his principal dive boat is
fuel efficient and highly reliable.
A self confessed dive nut, Andy Wright
hitched a ride into Mission Beach with $20
in his pocket. He liked the diving and
stayed. Today he runs a highly successful
operation and owns three boats with a
collective value in excess of $2 million.
'Calypso II' started life as a commercial
lobster boat in 1988. When Andy purchased
the boat in 2004, it had already been
converted as a dive boat and the original V8,
four-cycle automotive based diesel engines
had 7,000 hours up. In Andy's words, they
were "old and totally clagged." But he had
them re-built and got a further 2,000 hours
out of them before he had endured enough
heartache and worry.
"The original engines were expensive to
run, chewing through 650 litres of diesel a
day," Andy said.
"I looked briefly at building a new boat
but couldn't justify the $2 million cost for a
new boat when compared to a re-power. I
already had the right boat, I just needed the
"I looked at everything available but I
kept coming back to Yanmar for 'Calypso
II'," Andy said. "I like the brand, Yanmar
has a great name and I liked the fact that
the 6HY engine series is a purpose-built
commercial marine engine and not simply
a derivative of a tractor or truck engine."
"And I already have twin Yanmar 4.2
litre 6LPA engines in the 'Calypso Spirit'
dive boat and they just keep running and
running. You can't kill them!"
'Calypso II' was taken to Townsville
where the old engines were removed. The
re-power process involved new engine beds
being made and a new exhaust system being
installed. The Twin Disc transmissions, drive
shafts and props were all retained.
Yanmar's 6HYM-ETE model engine,
which is part of the Yanmar commercial
engine range, is a true blue work boat
quality engine and includes Yanmar's latest
combustion chamber design named
ASSIGN, a system originally pioneered by
Yanmar on their large bore, low speed
propulsion engines. This technology
combined with Yanmar's own mechanical
fuel system has enabled a fuel consumption
specification of 201gr/kW/hr at 100 percent
load from the heavy duty 368kW model, a
result which is giving owners something to
smile about in the current times of high
Now, after the re-power, Andy Wright
has noted some big savings not only in his
fuel cost but trip times as well. The fuel
consumption has plummeted from 160
litres per hour to 120 litres per hour (60
litres per hour per engine). That's a saving
of 25 percent or, looking at it another way,
a fuel saving of 160 litres per day or nearly
50,000 litres per year.
With the new Yanmar 6HYM-ETE engines
installed, 'Calypso II' (which weighs 45
tonnes and is 22 metres in overall length) has
a cruise speed of 18 knots with the engines
ticking over at 1,850rpm and a maximum of
24 knots. Before the engine change, the
maximum speed was around 20 knots with a
typical cruise speed of 16.5 knots.
"We now have huge fuel savings, the
engines are quieter and my skippers are very
happy," Andy said. "One thing that Yanmar
is noted for is the low level of exhaust fumes.
In the dive business this is important to us
and Yanmar certainly delivers on this score."
Dive operator repowers with Yanmar for 25 percent fuel saving
Advances in MARINE ENGINES and PROPULSION SYSTEMS
March 2010 AUSMARINE
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