FREQUENTLY ASKED QUESTIONS

A waterjet is a propulsion system that draws water in through an intake, accelerates it with an impeller, and expels it through a nozzle to create thrust. It replaces the need for a traditional propeller and offers safer, more responsive maneuvering.

A waterjet works by pulling water in from beneath the hull, pressurizing it, and pushing it out at high speed. This generates forward motion while providing superior control, especially at high speeds or in shallow waters.

Waterjets offer greater maneuverability, reduced draft, improved safety, quick acceleration, and minimal vibration. They are also ideal for high-speed craft and vessels that operate near people or objects.

Waterjets are used in military craft, police and rescue vessels, ferries, pilot boats, crew transfer vessels, workboats, and leisure yachts. They are popular where speed, precision and safety are critical.

The correct system depends on vessel size, hull design, mission profile, engine setup, and desired performance. MJP provides engineering support and the Jet Selector Tool to match you with the ideal configuration.

Waterjets require optimized hull geometry for intake flow, loading, and performance. Proper positioning improves efficiency, acceleration, and cavitation resistance.

Key inputs include displacement, resistance curves, engine power, operating profile, and required top speed. Our engineers support calculations during concept and pre-design phases.

Yes. MJP waterjets work seamlessly with diesel, hybrid, and fully electric drivetrains and support both direct and gearbox-driven configurations.

We supply 3D models, interface documentation, intake drawings, weight tables, and installation guidelines to ensure accurate integration into vessel designs.

Waterjets eliminate appendages and shift weight internally, improving stability and reducing drag. Proper placement balances longitudinal trim and enhances performance across speed ranges.

Installation is straightforward when intake geometry and engine alignment are prepared correctly. MJP provides detailed installation guides, drawings, and on-site support.

Yes. Many shipyards retrofit waterjets to improve maneuverability, efficiency, and lifespan. MJP supplies retrofit kits, engineering support, and performance predictions.

Typically: hull drawings, engine specifications, shaft layout, operating requirements, and space constraints. From there, MJP helps verify compatibility.

With no exposed propellers or shafts, maintenance is reduced. Key checks include intake screens, wear components and control system calibration.

Yes. Their robust construction, fewer moving parts underwater, and modular design minimize service interruptions and allow quicker maintenance cycles.

Yes. Waterjets allow precise low-speed handling, instant throttle response, and safer maneuvering – ideal for docking, tight spaces, and high-speed runs.

At higher speeds, waterjets often deliver better fuel efficiency due to reduced drag and optimized thrust. Performance depends on hull type and load.

Routine checks vary by usage but generally include intake inspection, lubrication, and wear ring evaluation. Many operators experience lower maintenance than with propeller systems.

Common causes include intake blockage, cavitation, or wear on impeller components. MJP’s diagnostics and support team can quickly identify the issue.

Yes. Since no propeller extends below the hull, waterjets reduce grounding risks and are better protected when encountering debris or shallow conditions.