Power Profile

Jetwave Bingo & Stanley Point
Yanmar Australia

BtB Marine recently delivered a beautiful pair of identical line boats destined for the Western Australian ports of Fremantle and Port Headland. The port contractor asked specifically for Yanmar 6LY2A-UTP engines in both boats, an engine they know to be frugal on fuel, simple to maintain and incredibly reliable.

Each boat is running just a single 370hp (272kW) @ 3,300rpm Yanmar, yet performance and handling characteristics have proven spectacular for these 3.6tonne (lightship) work horses.

Like the purpose-built marine engine Yanmar powering it, the 800LB is a practical monohull design and described by BtB's Chris as a “fairly basic boat”. No-nonsense line handling and dive platform vessels they may be, but there has been more go into these aluminium work brutes than just a good engine.

“The client stipulated the Yanmar 6LY2A-UTP's because they know they’re a good motor and easy to service,” he explained. The 6LY2A’s have been coupled to Hamilton jet propulsion via a Twin Disc MG 5050SC transmission and a 400mm jack shaft in each boat, with BtB opting to use genuine Yanmar engine mounts also.

The Yanmar’s famous power-to-weight has again delivered beyond expectations. “The specification from the client was for a working speed of at least 21 to 22 knots,” Chris said. “The Yanmar and water jet combination has delivered a 30 knot top speed fully loaded, (33.5 knots lightship), and they easily do a cruising 21 knots at around 2,500rpm of engine speed.”

That’s impressive on-water motivation for the 800LB, given it has a 400litre fuel and extra 1 tonne carrying capacity fully loaded!

Power-to-weight is only the start of the 6LY2A’s credentials however, with this 6-in-line, 535kg (without gearbox) turbocharged diesel doing far more with its 5.8 litres of capacity than meets the eye.

A mechanically-controlled engine, this simple but powerful direct-injection, in-line marine diesel is much sought after by marine operators like ports, water police , dive charter and other commercial boat operators. Simple maintenance, long service intervals (250 hours) and easy access to service and engine vitals are a hallmark of this well proven Yanmar purpose built marine engine.

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Application: LDC - Line Boats
Vessel Construction: Plate Aluminium - Monohull
Vessel Name: "Stanley Point" & "Jetwave Bingo"
Length: 8.5m (LOA)
Weight: 4 tonnes
Engine Model: Yanmar 6LY2A-UTP
Engine Power Rating: 272kW / 370hp @ 3,300rpm
Cruise Speed: 33.5 knots
Top Speed: 29.6 knots

Disclaimer: Power Equipment provides this Performance Report for general information only. This data is accurate only as to the exact date, time and specifications set out in this Report. YANMAR makes no warranties as to the performance or fuel consumption of any boat equipped with a Yanmar engine as numerous factors affect actual performance of an engine.