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nzjetboating.com Forums => Projects => Topic started by: 2easy on June 16, 2014, 22:19:43 PM

Title: Wannabuildajetboat
Post by: 2easy on June 16, 2014, 22:19:43 PM
G'Day,
          Another newbie wanting to build a boat. Have just purchased a GP760 pump unit,($200) dont know if thats a good or bad thing. Need some advice from the experts. You Kiwis are awesome. For a first build will probably get a set of plans from one of the many available, probably jetdesign. Was thinking of running an ej20 or m15, whatever is cheap and available at the time. Boat will be used for river fishing, full of submerged logs and gravelbars.
Already have one of those other boats that needs 1m of water to go fishing in, unfortunately where i live (NSW OZ) the river height is goverened by irrigation needs downstream not my need to drown some bait. Considering it's a fishing boat and not a race boat what size boat would this combo suit? Was hoping for around the 4m mark. Does a 2 stage pump put out more power?(wouldnt have a problem adding a stage to the unit). If my choice of jet pump is way off the mark then i will be happy to just build a boat to suit it and go flatout up the Murrumbidgee, just for fun.
                                                                                    Cheers.
Title: Re: Wannabuildajetboat
Post by: heemi.v8 on June 17, 2014, 13:42:55 PM
i wouldn't go bigger than 13ft. there are a few bigger jet ski type boats on here

http://www.nzjetboating.com/yabbse/index.php?topic=26389.0 (http://www.nzjetboating.com/yabbse/index.php?topic=26389.0)

http://www.nzjetboating.com/yabbse/index.php?topic=25324.0 (http://www.nzjetboating.com/yabbse/index.php?topic=25324.0)

http://www.nzjetboating.com/yabbse/index.php?topic=25869.90 (http://www.nzjetboating.com/yabbse/index.php?topic=25869.90)

http://www.nzjetboating.com/yabbse/index.php?topic=26554.0 (http://www.nzjetboating.com/yabbse/index.php?topic=26554.0)

a few of them are not jet ski powered. the key with your power plant will be to keep it light as possible
Title: Re: Wannabuildajetboat
Post by: Dicko on June 17, 2014, 14:24:02 PM
Gidday 2Easy, good to hear of another keen Jetboater in NSW, I currently live in the Hunter Valley and have a 11ft Attack Marine with a 15f n/a, there are about 4-5 similar builds in NSW and a few in QLD.
Jet Design build a good boat and have heaps of experience, can also recommend Bill Roberts from Attack Marine in NZ and Tuiman who is a sponsor on the Web Board.
Jet Boating Australia are also a good contact over here and worth joining, if you are keen maybe able to organise a run in a little boat.
Title: Re: Wannabuildajetboat
Post by: 2easy on June 17, 2014, 20:41:23 PM
G'Day,
           Thanks heaps for the replies, much appreciated. Have read a lot of heemi.v8 posts, 13 ft sounds good. Have a mate who imports Jap motors so thought i would go and annoy him for awhile and weigh a few different ones to see what is available. Dicko i might have to take you up on the offer of a joyride as i have never been in one as yet. Do have plans for a second build along the lines of "clappy's" boat, ls1 powered. Cheers.
Title: Re: Wannabuildajetboat
Post by: ninjamaster on June 19, 2014, 03:06:45 AM
Im almost done building a 14 foot open bow fishing boat. Its being powered by kawi 15F. Final touches are being completed, Im crossing my fingers it will be done in less than 2 weeks.

heres my thread, when Im done ill do a video walk around.

http://www.nzjetboating.com/yabbse/index.php?topic=26389.0 (http://www.nzjetboating.com/yabbse/index.php?topic=26389.0)
Title: Re: Wannabuildajetboat
Post by: 2easy on July 09, 2014, 22:58:21 PM
Ok picked up a suzi m15a today, now to get it going and connected to the unit. What thickness material for an intake?
Any info on how to make this motor run would be appreciated, would like to keep injection and factory ecu if possible.
Is this the best option or is fitting a dizzy and carbies the way to go? Cheers.
Title: Re: Wannabuildajetboat
Post by: 2easy on July 31, 2014, 12:39:10 PM
Anybody know anything about ausjet units? Are they any good or not?
Title: Re: Wannabuildajetboat
Post by: jetdesign on July 31, 2014, 14:11:34 PM
Get as much of the original wiring loom as possible
In particular get the ignition and key
Title: Re: Wannabuildajetboat
Post by: 2easy on July 31, 2014, 15:23:55 PM
Thanks JD, engine loom came with motor, will have to go back and get the key and ignition.  Do i need the loom that is inside the dash? Cheers.
Title: Re: Wannabuildajetboat
Post by: jetdesign on August 01, 2014, 11:39:22 AM
You can talk straight to the guy's that completed the first install of a factory suzuki swift ignition in Hamilton if you like
Just flick me a PM
Or go to jetdesignco.co.nz for contact details
Cheers
Phil
Jetdesignco
Title: Re: Wannabuildajetboat
Post by: Jeff B on August 01, 2014, 14:08:53 PM
You can talk straight to the guy's that completed the first install of a factory suzuki swift ignition in Hamilton if you like
Just flick me a PM
Or go to jetdesignco.co.nz for contact details
Cheers
Phil
Jetdesignco
Did he get the driveshaft sorted?
I heard somebody did a boggie weld on it and the Suzuki had too much grunt and snapped it? pop pop cou
Title: Re: Wannabuildajetboat
Post by: jetdesign on August 01, 2014, 16:11:44 PM
You heard wrong )1
Title: Re: Wannabuildajetboat
Post by: Matthewf/Norbert/TuiDog on August 01, 2014, 17:23:16 PM
You heard wrong )1
   O)))) O))))  now now girls scr
Title: Re: Wannabuildajetboat
Post by: jetdesign on August 01, 2014, 17:49:25 PM
All in fun Matt
I love Jeff just as much as ever scr
Title: Re: Wannabuildajetboat
Post by: 2easy on August 01, 2014, 21:33:22 PM
Suzuki too much grunt? I might have to build a bigger boat!
Title: Re: Wannabuildajetboat
Post by: swifty on August 01, 2014, 22:31:45 PM
Did he get the driveshaft sorted?
I heard somebody did a boggie weld on it and the Suzuki had too much grunt and snapped it? pop pop cou
The truth is out there!
Title: Re: Wannabuildajetboat
Post by: Matthewf/Norbert/TuiDog on August 01, 2014, 22:56:25 PM
All in fun Matt
I love Jeff just as much as ever scr

it will all sort itself out when you get better at welding!
Title: Re: Wannabuildajetboat
Post by: mohawk on August 01, 2014, 23:30:26 PM
it will all sort itself out when you get better at welding!
How long does it take a person too get better at welding  ???
Im worried as hell now  C"" C"" C"" C"" C""
Title: Re: Wannabuildajetboat
Post by: Jeff B on August 02, 2014, 06:29:46 AM
How long does it take a person too get better at welding  ???
Im worried as hell now  C"" C"" C"" C"" C""
I think you have reached your prime regarding weld quality Mohawk! ()()
We all know that most of the time the weld is not to blame ;)
Title: Re: Wannabuildajetboat
Post by: jetdesign on August 02, 2014, 06:58:06 AM
The truth is out there!

If you are truly interested in airing this dirty laundry then let's open it up shall we

I had a client turn up to my shop with a blown up ZX10 boat
Built by (un named)
He asked for advise and rough prices to repair or replace
All good so far

Next meeting with the client I find a very "Dodgy" install of a Suzuki Swift motor in place of the ZX10
The boat is "Dead in the water"

After some long hours and many "free parts" the "Zuki"
Is now going and client is happy

Next thing Client arrives back with exploded drive shaft?
I find the spline has been "Dodgy welded" and then ground and filed to fit the "Rooted" impeller (won't mention who organised this cock-up)

I then got some SAF 2205 machined for a replacement drive shaft
This was threaded and wound into the coupling (weak link)
A " keeper weld" was added at the outer end to prevent the coupling from un winding

Damage
The thread was wound completely off the shaft in the tightening direction

I might mention at this point that there has been NO charge from jetdesign at all for any of this work

I am now looking at machining a complete one piece drive shaft for the client
Also at no charge

I don't mind criticism but feel that FACTS are very important







Title: Re: Wannabuildajetboat
Post by: swifty on August 02, 2014, 08:01:50 AM
Nice work its good to get the full story out there. We are all big fans of your work here  b>
Title: Re: Wannabuildajetboat
Post by: Jeff B on August 02, 2014, 10:34:35 AM
I recently got a complete driveshaft machined with a spline each end from 2205. It's 20mm dia and matches the polaris rubber engine damper to the Seadoo jet pump, works mint.
I have some 30mm 2205 here left over from a job if you want a bit but i think that boat will need the jet unit angled or raised to get straight alignment?
I'm wondering if he had the driveshaft out of phase?
Title: Re: Wannabuildajetboat
Post by: Spanners on August 02, 2014, 11:04:53 AM
I recently got a complete driveshaft machined with a spline each end from 2205. It's 20mm dia and matches the polaris rubber engine damper to the Seadoo jet pump, works mint.
I have some 30mm 2205 here left over from a job if you want a bit but i think that boat will need the jet unit angled or raised to get straight alignment?
I'm wondering if he had the driveshaft out of phase?

Do the splines hold up ok on the 2205 without any further hardening?
Title: Re: Wannabuildajetboat
Post by: jetdesign on August 02, 2014, 12:24:55 PM
They have been good so far
Title: Re: Wannabuildajetboat
Post by: Jeff B on August 02, 2014, 14:22:28 PM
Mine has been fine but i havn't done many hours yet. If it's chattering then it will flog out, no matter what it's made of. I never liked to weld stainless driveshafts. the HAZ gets brittle.
There is not a lot of shock loading on a jet unit. I tested the jet unit shaft material on a few different jet units,
Newish 2 stage was 2205 duplex
Old Colorado 3 stage was 430 stainless
Brand new aftermarket Yamaha stainless ski pump was the softest, dirty old 304L stainless.
I never tested the Kawasaki shaft but it wasn't that hard to machine.
Car axles are WAY harder. 2c