GP Engineering Ltd
GP Engineering | Wavebreak RIBs | Jetboat Parts | Jetski Service & Parts | Jetski & Boat Trailers | Contact Us

Jetboat Parts

Looking for an inexpensive yet durable waterjet propulsion system for your jetboat? You've come to the right place!

When we started to design and build Wavebreak Jet RHIBs we found there were no jet intake and pump housing assemblies commercially available for small jet boats. We had no choice but to design and manufacture our own.

Easy to install, our proven jet propulsion assembly provides excellent acceleration, gives no cavitation and is now available for your own jetboat building requirements.


GP Engineering Jet Propulsion Assembly


Complete Pump Assembly for Small Jet Boats

Complete jet pump assembly includes intake housing, intake screen, driveshaft and seal assembly, stainless steel wear-ring, stator assembly, impeller to suit, nozzle, reverse bucket, six-degree wedge, and coolant pipe. Standard complete pump housing assembly is comprised of both new and refurbished parts. (Jet pump assemblies consisting of all new parts is available). Optional trim nozzle shown.

The system is designed to run between 5000 RPM and 10,000 RPM and can handle 60hp to 200hp.



Bolt-On Heavy-Duty 5083 Alloy Intake

The aluminium intake unit is removable and does not require welding of any sort (preventing hull distortion which can occur when welding intake ducts into hulls.)

Easy to install, our proven intake design provides excellent acceleration and gives no cavitation.


Optional Extras for GP Engineering Jet Propulsion Units

While most boat builders choose to install our complete jet system, parts are available individually as are optional extras including heavy-duty impellers, trim rings for tune-ability of steering nozzle, spare impellers, impeller tool, pump bearing and seal kits, and engine couplers modified to suit engine type.


Rugged Stainless Steel Intake Grate

Our pump assemblies are designed for river work and feature a heavy-duty stainless steel intake grate which allows only small objects to enter the pump, eliminating the fear of jamming and damaging components.

The aluminium intake unit simply bolts into the hull (no welding required). It is fully-removable for easy maintenance and repairs.


New and Reconditioned Motors


GP Engineering is New Zealand's only authorized Textron Weber Motors Service Dealer. We stock parts and accessories needed to install and maintain these four-strokes including sparkplugs, oil filters, fuel filters and more.

As a Polaris Master Service Dealer since 2001 we are experts at diagnosing, servicing and repairing Polaris motors and watercraft.

We are also authorized installers of Mercury Marine motors.

Unsure of which motor would suit your application? Give us a call or email and we will assist you in selecting the most appropriate motor to meet your needs.


Motors In Stock

Our stock list of motors include the following which are perfect for small jetboats:

*New Weber Motor Sports 850cc (120hp - 155hp) Turbo-Charged Four-Strokes

*Reconditioned Polaris 700cc (95HP) Two-Strokes

*New Mercury 2.5L (200HP) OptiMax Two-Strokes (available installed in our Wavebreak Jet RHIBs)


*Other motors available - please enquire


Make Every River Longer with an Outboard Jet

Install an Outboard Jet unit and convert your outboard-powered boat to a jet boat whenever you want.


Boat Building Parts


Service, Parts and Repairs

We couple the highest standard of workmanship and products with fair and honest pricing, striving to exceed customer expectation and satisfaction. Let us help you!



Wavebreak Jet RHIBs

Want a jet boat? Let us build one for you!

Wavebreak Rigid Inflatable Jet RHIBs are designed, custom built, sold & serviced directly by GP Engineering Ltd. Our jetboat lengths range from 3.8M to 6M and are available as Sport, Centre-Console and Cuddy Cabin.

Our expertise and flexibility in the manufacturing process ensures your boat is outfitted the way you want and need it.

Give us a call or email today. We are always happy to help and look forward to hearing from you!


Phone us at +64 (0)3 546-5065 or send us an Email: Click here





JB-001  -  Complete Jet Pump Assembly  -  enquire
Complete jet pump assembly includes intake housing, intake screen, driveshaft and seal assembly, stainless steel wear-ring, stator assembly, impeller to suit, nozzle, reverse bucket, six-degree wedge, and coolant pipe. Standard complete pump housing assembly is comprised of both new and refurbished parts. (Jet pump assemblies consisting of all new parts are available). Optional trim nozzle shown.


Complete Jet Pump Assembly

JB-002  -  Alloy Intake Unit  -  enquire
Easy to install, our alloy intake unit simply bolts into the hull (no welding required) and is fully-removable for easy maintenance and repairs. Proven design provides excellent acceleration and gives no cavitation.





Alloy Intake Unit

JB-003  -  Jet Pump Housings and Wear-Rings  -  enquire
Don't throw away your jet pump housings because of damaged wear-rings! Our full-service engineering shop performs complete resleeving for Kawasaki, Polaris, Mercury Sportjet and Weber Motor housings. We also supply aftermarket jet pump housings and wear-rings for Yamahas.


Jet Pump Housings and Wear-Rings

JB-005  -  Impellers - New, Reconditioned and Rebuild/Repairs  -  enquire
We supply new and reconditioned impellers. Our full-service engineering shop can also repair and rebuild your existing impeller.


Impellers - New, Reconditioned and Rebuild/Repairs

OBJ-100  -  Outboard Jet Units  -  enquire
Convert your traditional outboard motor to a jet model with an Outboard Jet unit. GP Engineering is NZ's authorized Outboard Jet dealer and will source (and install if needed) the appropriate unit for your motor.


Outboard Jet Units

GP Engineering | Wavebreak RIBs | Jetboat Parts | Jetski Service & Parts | Jetski & Boat Trailers
Contact Us

GP Engineering Ltd, 120 Tahunanui Drive, Nelson
New Zealand
Tel: +64 (0)3 546 5065, Fax: +64 (0) 3 546 5068
Email: Click here

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