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> Boats & Parts > Parts & Hardware > Propulsion and Outboard Units


CNC Precision Jet Boat Drive - X-Large

CNC Precision Jet Boat Drive - X-Large
CNC Precision Jet Boat Drive - X-Large

This jet boat drive is hand finished and precision CNC machined from billet alloy and comes complete with impeller system and vector thrust system.
A powerful and exciting way to power bigger R/C boats.

Drive Shaft: 8mm
Impeller Size: 53mm
Impeller Blades: 4


Weight: 797g
International Warehouse
Price  $403.57

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goods will be available within 30 days
 Customer rated
Total of 82 discussions.
Glenn  1 points - 11/21/2015
,,, this simple test is the best visual demonstration ,,, run a water hose with a powerful stream that makes the hose tip want to flail about wildly ... then plunge the tip underwater into say a 1/2 bucket of water... a massive proportion of thrust is negated ... note the differance between discharging above or below water ... a Jet unit does not need to "Push" against any thing to generate thrust ,,, forward motion of the boat is a result of discharging mass in the opposate direction ... discharging under water reduces thrust dramatically
Mohsen  1 points - 11/19/2015
Which e-Motor would you use for that?
Steve  7 points - 11/10/2015
I ran it at 13,900 RPM with no problems. The motor drew 975 watts (1.3 HP) at 13V (4S) and threw out a pretty big rooster tail. Although the Turnigy Aquastar motor could handle twice that, I worry about bearing failure or cavitation at 25K RPM. I added a spiral cut coupler between the motor and Jet Drive to eliminate any issues with alignment. target=_blank> I've only tank tested the motor and don't know if there are any issues of water intake at speed.
 Glenn 1 points
Fullsize ... as you look for more speed the intake size is reduced ... at the expense of acceleration ... some even have a "gate" to allow the intake area to be open too start and necked down at speed .... which leads on to nozzle sizing ... large nozzle = more mass in given time = better acceleration ... less top speed with a smaller nozzle same water volume has to flow faster through the smaller orifice giving better top speed ... again at the expense of acceleration Hope some of this helps ....I see you're well acquainted with data logging ... love to see your results
 Glenn 1 points
My calc's suggest 25k fine 28k even ... at what point cavitation shows up ... let us know .... Its REALLY loud and prolonged will show up as pitting behind the blade edge I've been stuck at 10500 max on my 68 dia dual stage large hub unit Electric is a new ballgame ... Be aware that a unit will hog power and torque like you wouldnt believe ... keep an eye on the watt meter Generally deep groove balraces are limited in their thrust loading .... and seeing as ALL the thrust is seen by the front bearing I suggest an angulat contact bearing or a dedicated thrust stack included for a high hp /rpm setup ... Oil lubrication is the best way to improve service life of any bearing setup
Harald  8 points - 9/26/2015
Just about the "reverse bucket"..... In the part list as well as in the drawing the jet pump is WITH reverse bucket..... But on the pics and in the text it's not mentioned. Question: does the unit comes with the revers bucket or without? additional question in case it comes without the bucket: can it be ordered as after-sales spare part? Thx for a short answer best Regards Harald
Vladimir  7 points - 9/9/2015
What about the propulsion? What engine and it's power are required?
 Craig 27 points
I'm running a 26cc petrol engine in a 1 metre hull not anything to flash and it fly's
 Vladimir 7 points
Din anybody measure the thrust on the ship-way?
Customer Reviews
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Have just recievied my jetpump. Would have given it 5 stars but there is no instruction sheet that should have an exploded view with all relevant parts & number. The unit is very well made and looks more impressive than the picture posted of it. Perfectly finnished and spins over smoothly by hand. All parts fit and move together very well. Highly rate this item. Well worth the long wait for it. Hope parts will be available.
Need spare impellor & stator for any misshaps. Well done HK. A fine bit of CNC work.

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Received mine too, the finish is ok. The strengh of the hull is 2mm aluminium. The scews on the bottomplate are still not countersunk, but you can easily make them. Sadly the hull is not 100pcnt waterproof, you have to disasseble the jetdrive and make some sealing. But still, the overall quality of the drive is ok, but for the price I expected more. here some pics of the drive and

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have received 1 of the 2 pump i've ordered, very impressive looking unit still constructing hull, so I can't check for leaks yet, impeller spins freely, as mentioned by someone else the screws conecting the grate to the pump would have been better if they we're countersunk, but that can be overcome. overall a very good unit (just got to get my hands on the other one).

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Hello all. I have 2 of these pumps.... one of them is for sale if you cant wait for stock to come back in. untouched in box ! ..... have no need for the 2nd one as my twin project is no more. $260 US shipping ?

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It arrived after paying the douane in the Netherlands . When i opened the box , i was a little bit dissapointed . There was a gap between the 2 halves of the JET . Near the bearings the gap was more than 1mm . I measered the gap and took a knife and sissers and made a gasget 0,6mm thick . I sealed it with silicon and so it fits and seals perfect . Bearings are now good in place . I will use the JET with a geared 49cc . 15000 rpm on the jet 10000rpm on the motor . Motor is a tuned pocket-bike (gag ) engine 49cc .

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