Big Output Yanmar
The Yanmar 6CXM-GTE2, in-line six-cylinder
500hp engine is a big output engine for big blue water boats
such as the Black Watch 40.
The Tweed Heads-based boatbuilder has installed
the first pair of Yanmar 500s to come into the country in
their new 40 foot game boat, which ironically was virtually
shipped out of Australia to the United States almost as soon
as it was launched.
Following sea trials Black Watch said that the
high-speed lightweight Yanmar engines were well suited to
the 40-foot hull.
This lightweight compact engine that stands
905mm high and 877mm wide, displaces 7,413 litres (452cu in)
and features a new free-breathing four-valve per cylinder
head, with a longer 130mm stroke to increase horsepower.
Yanmar engineers have put a lot of development
work into the cylinder block that includes a high pressure
fuel injection system that incorporates a boost compensated,
distributor type fuel pump that eliminates black smoke on
start up and when backing down on a fish.
With a dry weight of only 825kg the engine delivers
500hp (368kW) at 2900rpm, giving it one of the best power-to-weight
ratios in its class. Figures run by Yanmar on the Black Watch
achieved a top speed of 31 knots at 2800rpm and a fuel consumption
of 96 litres per hour for each engine.
Dropping the revs down to 2500 saw a cruising
speed of 25.2 knots and a low 51 litres per hour for each
engine. The fuel rate dropped dramatically at 1,000rpm, and
an idling speed of 7.6 knots to only 4.8 litres per hour for
Enquiries: Power Equipment, Mike Edwards.
Tel: (03) 9764 0711. Fax: (03) 9764 0678.