Performance Outboard Spares

Performance motors such as the 48V-11×5 create a lot of torque, and are designed to drive large craft.
Say up to 15 meters, with weight, up to 4,000kg, to speeds of up to 10 knots.
The maximum speed achievable will depend on factors such as:

• watercraft displacement;
• waterline length;
• motor speed;
• propeller diameter and pitch, and;
• other factors.

Electric outboard motors are very different to petrol outboard motors, on a number of levels:

• Torque. Electric outboards maintain a higher torque throughout the RPM range.
  This means that electric outboards will have a higher peak torque for a given power output.;
• Efficiency. Electric outboards operate at about 80% efficiency, with about 20% being lost as heat.
  With petrol outboards, only about 25% of the energy converts to propulsion, with about 75% lost as heat.;
• Emissions. Electric outboards have no noxious emissions, whereas small petrol motors generate lots of noxious emissions.
  Not just CO₂, but unburnt hydrocarbons, SO₂, and NO_x.
  This is why the sale of two-stroke motors have been banned in Australia.;
• Noise. Electric outboard motors operate at much lower noise levels than petrol motors.
  This is especially true when the motor unit is immersed underwater.;
• Complexity. Electric outboard motors have very few moving parts.
  Small petrol engines, especially four-stroke ones, have an excessive number of parts, for their small size.;
• Power. Larger petrol engines (of 50hp or more) have an advantage over electric motor driven models.
  They can deliver the power required to get watercraft planing at high speeds for long periods.
  This is why electric outboards with more than 20hp power rating are not common.

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