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RE: Unofficial - 9/19/2011 3:59 AM   
sundogz



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From: Harriet, AR, USA
Status: offline 		Yeah, the damage to the stator was from pieces of broken impeller after hitting the sides of the pump. On the esc programming, I know just what you're saying. Some you go to center to enter, some you push forward (brake) and so on. But stick with it, you'll figure it out. What's bad is when you get wrong instructions from the factory. I recently bought this esc from HK, and the throttle option is supposed to have 4 settings: Auto, 1.1 to 1.8ms, Hard (acceleration), and Soft. But the beeps indicate only three options are available! And I've tried all 3, but always get soft acceleration. The manufacturer hasn't supplied the retailer with the (updated) instructions, so I'm stuck for now.

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RE: Unofficial - 9/20/2011 3:36 AM   
murmuzy-tearinto


 

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From: Halifax, NS, CANADA
Status: offline 		I'm sure i'll figure it out with patience. I'm torn about wether to order a new boat for the jet drive unit and shaft./impeller for $40+$26 shipping or just get a graupner mini jet for $30+ shipping. would be pretty cool i think.


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RE: Unofficial - 9/20/2011 2:42 PM   
sundogz



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quote:

ORIGINAL: murmuzy-tearinto

I'm sure i'll figure it out with patience. I'm torn about wether to order a new boat for the jet drive unit and shaft./impeller for $40+$26 shipping or just get a graupner mini jet for $30+ shipping. would be pretty cool i think.


If you can find a Graupner it will wind up costing you the near price of a boat after shipping. If you read back through this thread, an outfit in Australia was selling replacement jet drives on ebay.au 6-8 months ago, and may still have some. The search function on this site isn't working for me or I would try to find that info for you. I bought two from them and they are identical to the NQD drives.

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RE: Unofficial - 9/20/2011 2:56 PM   
TheOtherSide



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quote:

ORIGINAL: dyorge

<meta content=''text/html; charset=utf-8'' http-equiv=''content-type''/>
<meta content=''text/html; charset=utf-8'' http-equiv=''content-type''/>

757-6024 Boat Spare Propellers x 2 pcs



http://www.ebay.ca/itm/NQD-757-Spare-Propellers-R-C-Boat-757-757-6024-JET-Boat-x-2-pcs-/110742700100?_trksid=p5197.m7&_trkparms=algo%3DLVI%26itu%3DUCI%26otn%3D2%26po%3DLVI%26ps%3D63#ht_2478wt_907

<meta content=''text/html; charset=utf-8'' http-equiv=''content-type''/>





Thx for the link... just purchased a bundle of them!

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RE: Unofficial - 9/21/2011 2:32 AM   
Stein



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From: Saint John, NB, CANADA
Status: offline 		I just got mine a couple days ago and gave it a try and it sucks stock Time to upgrade what do you guys think of these:

http://www.hobbyking.com/hobbyking/store/__11875__ADS300_Water_cooled_Brushless_Outrunner_3000kv_300w.html

http://www.hobbyking.com/hobbyking/store/__7377__Turnigy_Marine_35A_Brushless_Boat_ESC.html

http://www.hobbyking.com/hobbyking/store/__10383__Turnigy_2200mAh_3S_35C_Lipo_Pack.html

http://www.hobbyking.com/hobbyking/store/__16269__HK15138_Standard_Analog_Servo_38g_4_3kg_0_17s.html

http://www.hobbyking.com/hobbyking/store/__10608__Hobby_King_GT_2_2_4Ghz_2Ch_Tx_Rx_.html

Also do you make the hole on the bottom of the boat bigger then add a better screen or leave the hole the same size? Also where would I buy an adapter for the motor 3mm to 2.3mm? Will the stock jet unit stand up to this motor I want to buy?

I want to order this stuff but want to make sure it will be pretty fast and good run times. Thanks for all the help guys.

Brian Stein

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RE: Unofficial - 9/21/2011 4:20 AM  1 votes
TheOtherSide



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From: Surrey, BC, CANADA
Status: offline 		I just want to chime in on the 3500-3900kv with 3s discussion again...

We went out to a nice river on the weekend... and ran the boats... all the guys were on 3s... and without question my son's 3900kv with 60amp esc on 2200mah 11.1v was the fastest. So I'm not too sure on the making more noise and not going fast... as the thing was nuts!!!! I ran my 3900kv on a 2s for a bit... had just barely enough power to overcome the river... but it was nice and smooth to surf!! So my own personal conclusion is... run 3500-3900 on 3s and you'll have a ton of fun... you just have to harness the power!!

Here's a youtube vid of sunday... the first boat you see is the all blue one... it's my 5yr old son's... and he's the only one driving it (the little guy in the rain jacket and matching rubber boots!) I'm a proud papa!!! My boat is the Black Top, White Bottom boat. (and that's me dumping the water out of my gum boots... went waist deep recovering the odd boat)

Link if you want to see it in larger format: http://www.youtube.com/watch?v=qWvxa6ppC7E



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RE: Unofficial - 9/21/2011 2:16 PM   
sundogz



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Status: offline 		Yes, I've seen this video - 4Mods had posted it earlier. And that is fast! But we're not comparing oranges with oranges here. You forgot to mention a very important factor - that you are running a 28mm motor. The 20mm motors in that rpm range can't produce that kind of torque and tend to reach a point of no return when running 3S over about 3000kv or 2S over 4500kv. But that does blow a hole in my theory of 'just so much water can be pumped by this jet drive". Obviously more water CAN be pumped - get a bigger motor! Thanks for bringing this to light - you have started something here and a lot of people will be grateful for this info.

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RE: Unofficial - 9/21/2011 3:29 PM   
sundogz



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quote:

ORIGINAL: murmuzy-tearinto

I'm sure i'll figure it out with patience. I'm torn about wether to order a new boat for the jet drive unit and shaft./impeller for $40+$26 shipping or just get a graupner mini jet for $30+ shipping. would be pretty cool i think.


Check this out - a replacement jet drive available on ebay for $18! Thought you'd like that!

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RE: Unofficial - 9/21/2011 4:07 PM   
yamaha74


 

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From: Calgary, AB, CANADA
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RC jet boat....finally found one on sale
Been lookin for 1 of these 18" R/C NQD Jet Boats for a while now,
and found this website  ...$40, plus $27 usps shipping to Canada = $67
Wiped the blue stars off with Brakeclean ( some thinners melt the plastic )
bought $5 worth of decals, and after running it for 10 minutes on a nearby
pond with the stock 9.6v 700mah battery, put an 11.1v 3s 1300mah lipo
in out of my F-16 EDF jet ... Night and Day power difference !



http://www.xenonproject.com/rc-boats/



 


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RE: Unofficial - 9/21/2011 10:10 PM   
DashRiprock


 

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Status: offline 		hey guys,  whenever i see videos like the one posted by the other side if you just take a bunch of Li-pos with you when you go out to run your boats or if you take your chargers with you when you go. i have 2 but will prob get a couple more, but im not sure i wanna take chargers out to the creeks when i go run my boat.


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RE: Unofficial - 9/22/2011 12:20 AM   
murmuzy-tearinto


 

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From: Halifax, NS, CANADA
Status: offline 		I used this site for the coupler i first got. they're really good and the shipping is reasonable. the gruapner mini drive is $33. http://www.cornwallmodelboats.co.uk/acatalog/graupner_jet.html

I ordered the replacement drive off of ebay, shipping only $2 can't complain! this is a much cheaper option and a lot less than i was expecting to spend, HOORAY. Thanks a lot for the link, I'm stoked for it to arrive.




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RE: Unofficial - 9/22/2011 8:40 AM   
swervyn


 

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great reading and tips as always, still waiting for the boat making fairy to put mine together



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RE: Unofficial - 9/24/2011 8:55 PM   
losifiend


 

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From: Chino, CA, USA
Status: offline 		I have wanted one of these boats for a while, but seems like most people replace the jet drive. Is it necessary to replace the jet drive even when upgrading to a 2200-2600kv brushless motor? I found the same website as yamaha74 did and for the money, I think I'm finally going to get one to mess with. This wont be mu first boat or build, but it will be mu first jet boat. So just looking to keep it simple and learn from it like I did with cats and monos.

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RE: Unofficial - 9/25/2011 3:04 AM   
sundogz



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Status: offline 		There's no need to replace or remove the jet drive. It's the motor that need replacing. The stock unit is anemic.

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RE: Unofficial - 9/25/2011 7:55 PM   
losifiend


 

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Status: offline 		Thanks for the response. I'm pulling the trigger on one soon.

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RE: Unofficial - 9/27/2011 2:18 AM   
Stein



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From: Saint John, NB, CANADA
Status: offline 		I took mine out in stock form once and well I'm nodding it now. I have the motor and ESC on order. Will order the rest soon. Here is some pics of the paint job so far.
I will be painting it primer red first then blue then green. I will then scuff it up and make it look beat up. I did it with one of my crawlers (see pic) and it turned out nice.



















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RE: Unofficial - 9/28/2011 5:59 AM   
prontozuk


 

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From: SydneyNSW, AUSTRALIA
Status: offline 		Hi All,
New to the Jet Boating... And have been admiring some of the work done to them. I just got it and love the look and size of it. However I have a dilemma. When i took the top off I noticed the battery compartment is moulded in to the next layer of plastic. But when i see others post there is no moulded plastic section it is the inner hull. So have people just cut the moulded section out. Or have I got a different series of boat that includes the moulded section.





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RE: Unofficial - 9/28/2011 8:26 AM   
DashRiprock


 

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Status: offline 		No they all look like that from the factory. you have to cut them out yourself. but dont do like i did and cut them out incorrectly. i had to order a new boat because i didnt do it right. someone posted a guide with pics on how to do it in this thread somewhere.


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RE: Unofficial - 9/28/2011 2:46 PM   
Stein



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Status: offline 		Yep as stated above they all come like that. Just cut it out and leave some on the side so the cover will have something to sit on. Then put foam on that part so when you put the cover on it will be somewhat water proof. Look back in this thread for pics with it cut out to give you an idea where to cut it.

I used a sharp knife and heated it with a torch until it was red hot, than it cuts through the plastic very easy. Once it cools down and its harder to cut just heat it up again. Its like cutting warm butter with a hot knife

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RE: Unofficial - 9/30/2011 10:52 PM   
hqdby1


 

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From: Eastry, UNITED KINGDOM
Status: offline 		Well I've just got all my parts together and tub tested it! The power is immense, could barely hold it properly.

However, like most people say... The dog joint couple well... melted and blew up. So does anyone know of any good replacements that wont melt?

I'll get some pics asap!

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RE: Unofficial - 9/30/2011 11:07 PM   
Team Tekin



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Status: offline 		Both my boats are still running strong! Going to find a creek to play in this weekend, hopefully get some video from shore and I have an onboard I'm going to play with!

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RE: Unofficial - 9/30/2011 11:17 PM   
sundogz



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quote:

ORIGINAL: hqdby1

Well I've just got all my parts together and tub tested it! The power is immense, could barely hold it properly.

However, like most people say... The dog joint couple well... melted and blew up. So does anyone know of any good replacements that wont melt?

I'll get some pics asap!

I prefer a metal coupler to the u-joints because they last. The stock one is barely long enough when you upgrade the motor. Aren't you running a Graupner jet? And what is the size of your motor shaft?

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RE: Unofficial - 10/2/2011 1:40 AM   
Stein



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From: Saint John, NB, CANADA
Status: offline 		I'm looking for a coupler 2.3mm to 3.17 for this motor http://www.hobbypartz.com/07e-c-sl-10t-2848-blue.html. Anyone know where I can get one or should I just drill out the stock on?

Thanks


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RE: Unofficial - 10/2/2011 2:54 AM   
TheOtherSide



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quote:

ORIGINAL: Stein

I'm looking for a coupler 2.3mm to 3.17 for this motor http://www.hobbypartz.com/07e-c-sl-10t-2848-blue.html. Anyone know where I can get one or should I just drill out the stock on?

Thanks



Stock couplers do not do well long term... they'll vibe the poop out of your equipment. I have 15-20hrs on my Graupner u-joint without a problem. Here's a copy/paste on an email I sent a guy on this part:

Graupner u-joint: Scroll 3/4 of the way down the page... it's part # 355.4, and I drill out the 2mm part on a lathe with a 3/32" drill bit to make it 2.3mm exactly. If you don't have access to a lathe, just drill as straight as you can. doesn't hurt to buy 2 of them... they're cheap and take a bit to come from the UK.
http://www.cornwallmodelboats.co.uk/acatalog/couplings-graupner.html

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RE: Unofficial - 10/2/2011 3:44 AM   
sundogz



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Status: offline 		2.3 to 3 or 3.17mm couplers are pretty much non-existent for some reason. If you're not equipped to enlarge holes properly, email Jeff Wohlt (info@rcraceboat.com) about making you a custom coupler. Or better yet - get several, sell the others on this forum for a little profit to lessen the cost of yours. I had Jeff make some for me a while back that had 3 setscrews around the perimeter so I could eliminate any possible wobble by judicial tightening of the 3 opposed screws. He did a great job. I'm still running those couplers on some ABC Hobby Jet Ski's that we set up for racing (with that same 3900kv motor, by the way).

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