Home build 3.4m Alloy Jetboat (photo heavy)

Four months so far, just finishing touches really to go.

Bought Scrimshaw (of Dannevirke) plans and changed them a wee bit - mainly adding hull length and then more length past the transom, adding a transom box.

Later on in the piece we found it really difficult to get the windscreen looking good and personally I hate the low round style, so we changed that too with just designing an older style screen with cardboard then cutting out the alloy.

Plans cut out by Axis routers in Hastings.
Alloy carted round by yours truly and folded again by me in the press break at work.

Tacked and welded in my garage by myself and my bf.

All "finishing" welding on the top is TIG, all the other bits I did at work on the weekends. Funny when I spent bloody ages folding the engine cover perfectly..... only to find that the hull isn't actually square. A few quick tweaks and she fits like a dream now.

Seats made at home by me on the fabric welder.

Stickers by HB Signs in Hastings.

Rego inspired by my name, obviously, seeing as I'm such a narcissist.

Powered by a GP1300 that is a direct pluck out of another 3.4hull so the loom and gages were all good to go really.

I'm unsure about the name of the jet unit as that was so expensive that I have tried to block my brain off from all of that information and left it to the bf. Basically the whole set up is from a JetSki though.

Steering is a brand new push pull Jettech unit I think it's called? It's made specifically for jet boats, bought from the mediocre wet mops over at Freeman Marine in Napier. Ha ha.

It's been a great learning experience. I think I would enjoy building another one again but while we still had a boat on the water... things have been quite rushed as we sold our old steel boat to find this project. Although I have enjoyed borrowing my friend's small steel hull, we have been pushing to get into our own boat.

We have had one run at Clive and one on the Ngaruroro, before the handles and foot plates were in. This boat is bloody fast. It turns well which is a relief considering the changes we have made to the plans.

Headed out again this Sunday. Should be fun to try to get it a few more tricky places - it wasn't wise to be doing anything too dangerous last week without the ability to keep oneself in the hull if we stopped abruptly.

A strip of bizloy on the bottom will happen at some stage.

Enjoy :)

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very nice!
quite the homebuilt.

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Originally Posted by Awaian

very nice!
quite the homebuilt.

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Thanks, it's been fun. Hard work to get yourself to work on weekends though. My hunting has suffered for it this roar.


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Awesome !
I bet it was satisfying to finally get it on the water.

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put some marine carpet on the inside, on top of the treadplate. People think the treadplate helps from slipping. It doesn't!
Wet feet on treadplate are still dangerous.

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Originally Posted by scottrods

put some marine carpet on the inside, on top of the treadplate. People think the treadplate helps from slipping. It doesn't!
Wet feet on treadplate are still dangerous.

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The purpose of the checker was just because we had some 6mm left over from a job and bought it off the boss cheap.

The floor gets quite wet so we will leave it uncarpeted I think :) the inside is quite small, there is a foot plate for when you are seated otherwise there isn't much movement of people inside the boat.

The nose has a sheet of the grippy foamy type stuff that is where you put your feet on a JetSki. That's also on the reinforced dash for standing on.

Outdoor carpet is on the engine cover both to dampen sound and also minimise the frying pan effect of alloy in the sunshine.


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Man there's some clever people on here well done dougie and bf :)

Attachment 68453

Monumental effort :cool:
How many sheets of Ali?
Photos of your welders??? welder porn

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Originally Posted by sako75

Monumental effort :cool:
How many sheets of Ali?
Photos of your welders??? welder porn

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Uhhhh sheets... probably five now not including the bottom?

Welders are works. We have two Millers and I wouldn't know what the big MIG is. Come to think of it the small TIG "little red" is a miller as well.


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My TIG isn't quite weld porn yet but here are some fatties on the MIG I'm proud of... should take some pics of the trailer too as I've done a lot of work on that.

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Nothing to do with the boat just jobs I have photos of.



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bugger me flo is there any bloody thing you cant turn your hand to????great effort cant wait to see ya in camo wetsuit on the skis behind it givin the pesky ducks a hurry up.

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Originally Posted by kotuku

bugger me flo is there any bloody thing you cant turn your hand to????great effort cant wait to see ya in camo wetsuit on the skis behind it givin the pesky ducks a hurry up.

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Hahahahahaha [emoji23]


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Well bugger me jealous. Bloody good effort.

well if you d like dougie -Pengie can do the job -his stubby wee flippers make great skis and he dont mind a little gettin wet.

Shit fu***n good on you what a way to travel best of luck with it VERY ENVIOUS

Dougie we need to clone you. A lot of men would love to share their live with a handy girl like you! :-)

Good work. Had a mate just build a 4m pontoon jet boat with a lexus V8 and proflo unit for adventure/hunting boating and taking out to sea. Can't wait to get it out.

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Originally Posted by JoshC

Good work. Had a mate just build a 4m pontoon jet boat with a lexus V8 and proflo unit for adventure/hunting boating and taking out to sea. Can't wait to get it out.

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Awesome, I'm not too into the sea stuff though!

Last year I borrowed a mates boat and drove from Marekakako to sea then up the Clive to the pub [emoji16] a bunch of us did it (thankfully as I needed their help after sucking weed in the Clive and not knowing what to do ha ha). We just parked up the boats, had a few beers, then boated home! It was excellent!


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looks like a great way to get around. awesome job girl,pleased to see you have stuck around.

Brilliant! My missus sayes we need a boat,I showed her this thread and told her she needs to learn to weld.

That didn't go down too well.

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Originally Posted by norsk

Brilliant! My missus sayes we need a boat,I showed her this thread and told her she needs to learn to weld.

That didn't go down too well.

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Ha ha. Welding is my fav part of my job. Weld prep... not so much.

I nearly put a grinder through my face today. Don't tell your wife that lol



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Bloody nice work there Dougie!


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Originally Posted by Dougie

Ha ha. Welding is my fav part of my job. Weld prep... not so much.

I nearly put a grinder through my face today. Don't tell your wife that lol



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Dont put a meat axe on then!!! I know too many people with less than two thumbs and 8 fingers !

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Originally Posted by veitnamcam

Dont put a meat axe on then!!! I know too many people with less than two thumbs and 8 fingers !

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You mean a hungry wheel? Bf lost the end of his index finger with one about five months ago.

I am "not allowed" (happy to comply lol) to use hungry wheels or 9" ginders. We have a really great supportive team at work and I am usually able to get someone to help me with anything I feel uncomfortable with doing.


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Originally Posted by Dougie

You mean a hungry wheel? Bf lost the end of his index finger with one about five months ago.

I am "not allowed" (happy to comply lol) to use hungry wheels or 9" ginders. We have a really great supportive team at work and I am usually able to get someone to help me with anything I feel uncomfortable with doing.


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Basically a skill saw blade in a grinder.....there is varying types from thin to thick and in different profiles for gouging preps or cutting etc.
It is one of the most efficient way to manually cut/remove/prep ally and really clean as you are not embedding the cut with abrasives and glues and fibers and melted oxides.
However being hand held and "hungry" they really need to be used with a iron will...ie this will break both my arms before I let go of it.
Every single grinder accident I have seen myself or heard after the fact is complacency.
Hang onto the fuckr.
I agree (no offense m8) you possibly shouldn't be on the end of a 9 simply because it takes a bit of bulk to stall one in front of your face.

There's one on the battery grinder which is a good option for thinning tacks etc but cutting work is a leaded 1400watt plus.https://uploads.tapatalk-cdn.com/201...7944bd908d.jpg

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@veitnamcam I chucked a handle on my grinder after it tried to eat my face today [emoji23] and yeah I'm not into hungry wheels or 9", fuck that.

I got someone else to do the rest of the cutting today while I followed along behind, doing the welding.


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How to maintain a tan throughout winter:

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And I don't like people using my stuff [emoji23] I have deer skin TIG gloves, too...mmmmmmmmm

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Originally Posted by Dougie

My TIG isn't quite weld porn yet but here are some fatties on the MIG I'm proud of... should take some pics of the trailer too as I've done a lot of work on that.

https://uploads.tapatalk-cdn.com/201...07d07f8e46.jpg

https://uploads.tapatalk-cdn.com/201...7a4adb06bb.jpg

https://uploads.tapatalk-cdn.com/201...ffbb09157b.jpg

Nothing to do with the boat just jobs I have photos of.



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Nice mate and nice boat.


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Originally Posted by Danny

Nice mate and nice boat.


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Cheers [emoji16] I'm loving it.


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yes dougie -ive got 2 9"angle grinders and both of them are sociopathic mongrels in the wrong hands. I make bloody sure absolutely no one is in the immediate area when theyre used and its gotta be full protective gears .had a couple of hairy ones with using one the father in law gave us -a big old industrial one-fitted with a concrete blade . chewed up our old driveway when we relaid it.cow did kickback a couple of times-thank christ for the handle! would snap a wrist or forearm like a twig!
dougie -mate the mystery of all those years is broken- Gwen dear!hey are you still doing a bit of writing for hunting mags??

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Originally Posted by Dougie

How to maintain a tan throughout winter:

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And I don't like people using my stuff [emoji23] I have deer skin TIG gloves, too...mmmmmmmmm

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I'm with you on that. Helmets and gloves are like toothbrushes. You don't share......

Sorry to off topic slightly but how do you guys find the auto darkening helmets I've tried a few but find I get welders flash off them go back to a manual one and I don't get it

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Originally Posted by northdude

Sorry to off topic slightly but how do you guys find the auto darkening helmets I've tried a few but find I get welders flash off them go back to a manual one and I don't get it

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fine, i think some have more delay than others and maybe will go more dark?

Sometimes I can see the delay

Get one with 4 sensors and ya should be fine. Bottom of the range as with anything can be a bit crappy.

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Crank up the sensitivity or just bite the bullet and buy a better one... I have one for galv and another for tig because the mig one is shit and flashes me occasionally, it's about $99 I think. I don't want to ruin the good one by using it on spitty steel [emoji12]

Kotuku im writing for thebloke.co.nz

I stopped with NZO after they published photos without my permission, edited my articles and reviews without sending me a draft before publishing, then they fired the Editor who was sticking up for me.


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cheers for that flo -just carry on doin what ya doin cause by hell youre an outstanding example to women who want to get stuck in and mix it with the blokes -and so ya should.

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Originally Posted by Mauser308

Yeah, I get sick of that line "oh I can't do that - I'm a girl..." (usually just after I've tried to get them interested in joining up for vol fire...). Me daughter isn't going to get brought up to use that as an excuse!!!!

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I wouldn't say it's an excuse, more like the self doubt that society breeds into women.


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mines been a Voluee for 4yrs now and she caught 4 scribble faces stealing a boat.