Shotover Jet boat maintenance manager Brett Dingle beside
the new V8 Mercruiser engines the company has adopted for
their increase in fuel and environmental benefits. Photo by
Changes at Shotover Jet in Queenstown will increase the
thrill and bring environmental benefits, in time for summer.
The red jet-boat has gone from single engine when it began
commercial rides in 1970, to twin-set engines in 2001, and by
Christmas the company will boast a fleet of seven Mercruiser
350 V8 engines.
The company has taken steps, including looking at throttle
and fuel use and driver actions, to ensure the new boats are
Maintenance manager Brett Dingle said the seven jets used on
the river together used on average 550,000 litres a year in
The company wanted to cut that by 10%, meaning a saving of
"Anything we can save there can help," Mr Dingle said.
The new throttle meant drivers would have to push down harder
to get the last 20% of power out of the engine and would only
need to do so in emergencies or in rougher currents, saving
5% in fuel use.
This was because with the new engines came extra horsepower
the commercial rides did not actually need.
Changes have also been made to the driver and passenger
seats. The old style benches have been replaced with
individually cushioned seats.
Mr Dingle said that was a tough decision as Shotover did not
want to detract from the experience but wanted to enhance
passenger comfort and safety.
Each driver cost up to $40,000 to train, he said.
The biggest saving came from the new engine.
Mr Dingle said without any changes they would save 8%-10% of
fuel per trip. The new engines could use 95 octane fuel
rather than 98 octane, which all had to be carried by truck
Company drivers had been put under the microscope as many of
the newly trained drivers "like to use the throttle a lot
more", Mr Dingle said. The difference in fuel use for a new
and seasoned driver was 42-43 litres per trip and 34-35
litres per trip respectively.
Ngai Tahu Tourism regional manager David Kennedy said cameras
had been added at the front and back of the boat to film a
high-definition DVD which passengers could purchase at the
end of the trip.
The Dart River Safari Jet company, also owned by Ngai Tahu
tourism, would make similar changes when its fleet of
jet-boats neared the end of their lifespan, Mr Kennedy said.