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Jet Drives

Water Jet Drives

The Jet propulsion unit, also known as a water-jet unit, is primarily fitted to exclusive high-speed motor yachts, ferries, racing boots and similar full-size vessels. In principle this power system consists of a pump which sucks in water though an opening in the bottom of the hull, accelerates it by means of an impeller, then forces it out again through an opening in the stern. Newton’s law of motion now applies: the jet of water expelled at the rear generates an equal and opposite reaction in the boat’s hull.

Boats with Jet propulsion units can operate in very shallow waters, as all the parts usually mounted below the hull, such as propeller, shaft, shaft bracket and rudder, are eliminated. Initial acceleration with a jet unit is very high, and this can be a distinct advantage in certain types of boat such as dragsters. The heeling moment produced by conventional boat propellers is completely absent. Since the water in a Jet propulsion system has to cover long distances in narrow ducts, there are inevitable friction losses which require rather more energy than for an orthodox power system.

CEM Jet Propulsion Unit 78

CEM Jet Propulsion Unit 78


Price: 149.99 incl. VAT
Approx: 167.99 / US$152.49

Part No: CEM2000

Temporarily unavailable.

CEM Mini Jet 20 with Reverse Function

CEM Mini Jet 20 with Reverse Function


Price: 68.95 incl. VAT
Approx: 77.23 / US$70.10

Part No: CEM2010

Replacement Parts for Graupner Jet Drives

Replacement parts for the Graupner Jet Drive Units

Impeller for CEM Jet Drive

Impeller for CEM Jet Drive


Price: 9.00 incl. VAT
Approx: 10.08 / US$9.15

Part No: CEM2001

2340.2 Impellor for 2340 Jet Drive

2340.2 Impellor for 2340 Jet Drive


Price: 2.38 incl. VAT
Approx: 2.66 / US$2.42

Part No: G2340.2

Temporarily unavailable.

2344.1 Reversing Device for 2344 Jet Drive

2344.1 Reversing Device for 2344 Jet Drive


Price: 22.00 incl. VAT
Approx: 24.64 / US$22.36

Part No: G2344.1V2

2344.2 Impellor for 2344 Jet Drive

2344.2 Impellor for 2344 Jet Drive


Price: 3.05 incl. VAT
Approx: 3.41 / US$3.10

Part No: G2344.2

2347.1 Impellor 3 Blade for Jet Unit 5

2347.1 Impellor 3 Blade for Jet Unit 5


Price: 11.27 incl. VAT
Approx: 12.62 / US$11.46

Part No: G2347.1

2347.3 Reverse Bucket for Jet Unit 5

2347.3 Reverse Bucket for Jet Unit 5


Price: 13.28 incl. VAT
Approx: 14.88 / US$13.51

Part No: G2347.3

2347.4 Steering Nozzle for Jet Unit 5

2347.4 Steering Nozzle for Jet Unit 5


Price: 13.54 incl. VAT
Approx: 15.16 / US$13.76

Part No: G2347.4

Temporarily unavailable.

2347.5 Sealing Ring for Jet Unit 5

2347.5 Sealing Ring for Jet Unit 5


Price: 17.99 incl. VAT
Approx: 20.15 / US$18.29

Part No: G2347.5

2347.7 Nozzle Guide Vane for Jet Unit 5

2347.7 Nozzle Guide Vane for Jet Unit 5


Price: 14.99 incl. VAT
Approx: 16.79 / US$15.24

Part No: G2347.7

2349.2 Impeller with Shaft for Mini Jet Drive

2349.2 Impeller with Shaft for Mini Jet Drive


Price: 12.78 incl. VAT
Approx: 14.31 / US$12.99

Part No: G2349.2

Temporarily unavailable.

2349.5 Driveshaft Seal

2349.5 Driveshaft Seal


Price: 3.60 incl. VAT
Approx: 4.03 / US$3.66

Part No: G2349.5

2349.6 Brushless Motor Adaptor for Mini Jet Drive

2349.6 Brushless Motor Adaptor for Mini Jet Drive


Price: 4.14 incl. VAT
Approx: 4.64 / US$4.21

Part No: G2349.6

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