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nzjetboating.com Forums => Projects => Topic started by: Ross Goldsack - JBNZ Immediate Past President on August 23, 2020, 18:03:49 PM

Title: Lazy's new 3 metre
Post by: Ross Goldsack - JBNZ Immediate Past President on August 23, 2020, 18:03:49 PM
With the on going pandemic paranoia it has caused me to have a minor panic attack of my own, sending me on component spending spree just in case Cindy sends the rest of NZ back into lockdown. Better to be prepared  ;)

I ordered a Jeffjet 3.0 to be cut by Mike from LVB and hopefully it will be cut and folded shortly.

Specs. (Subject to change  ;D)
3000mm x 1290mm
10mm 5083 delta with 12mm hdpe.
2 piece nuke proof transom.
5mm outers and 3mm sides
Honda L15A7 with 2527 Chinacharger turbo
2 stage hybrid Kawasaki/DIY 157mm pump.

It will be nothing that you guys haven't seen already but I will post progress updates.
Title: Re: Lazy's new 3 metre
Post by: Ross Goldsack - JBNZ Immediate Past President on August 23, 2020, 18:09:27 PM
So far I've made an adapter to bolt the teeny tiny turbo directly to the head.
Title: Re: Lazy's new 3 metre
Post by: Ross Goldsack - JBNZ Immediate Past President on August 23, 2020, 18:12:35 PM
And I've started on the Laminova intercooler in the inlet manifold. Trying to keep it as smooth and as uncluttered as possible.
Title: Re: Lazy's new 3 metre
Post by: Ross Goldsack - JBNZ Immediate Past President on August 24, 2020, 21:31:47 PM
Got a few more bits done, finished the intercooler end caps and my boy James machined the drive coupling to match Honda flexiplate 👍👍👍. Counterbored the Kawasaki coupling and used the longer bolts from the manual transmission model. I'm stoked he's showing an interest in shed stuff.
Title: Re: Lazy's new 3 metre
Post by: rogee on August 26, 2020, 17:11:01 PM
nice, !!what do you do for a ring gear?
Title: Re: Lazy's new 3 metre
Post by: Ross Goldsack - JBNZ Immediate Past President on August 27, 2020, 07:56:35 AM
I just weld the ring gear off the CVT torque converter straight to the flexiplate. These Honda flexiplates are slightly thicker than the Suzuki M series and don't seem to crack ........ yet l-l
Title: Re: Lazy's new 3 metre
Post by: Ross Goldsack - JBNZ Immediate Past President on August 27, 2020, 08:02:48 AM
The tube was slightly to tight to slide laminova core into so I split and added 3mm in.
Title: Re: Lazy's new 3 metre
Post by: Jeff B on August 27, 2020, 10:13:11 AM
I normally just bolt the ring gear to that flex plate? Pretty sure the holes are already there?
I'm not doubting your welding skills Lazy...
I wanna see how you weld that stainless elbow to cardboard intake plenum... l-l
Title: Re: Lazy's new 3 metre
Post by: Ross Goldsack - JBNZ Immediate Past President on August 29, 2020, 15:24:37 PM

Quote
I'm not doubting your welding skills Lazy...
I wanna see how you weld that stainless elbow to cardboard intake plenum... l-l

Jeff - like you are with welding.... I am with sticky tape, nothing stands in my way.

Saturday afternoon is boys in the shed  b>
One engine mount made, two to go
Title: Re: Lazy's new 3 metre
Post by: Ross Goldsack - JBNZ Immediate Past President on September 01, 2020, 20:43:48 PM
Had a small opps when trimming excess weight off the little Honda (Jeff had warned me that they're a bit thin....what would he know 🤔)
Anyways...2 small cam chain viewing windows later I made some patches to weld back in, but I wacked the alloy plug right in to the engine. Tried tipping it upside-down and shaking but only oil and coolent came out  C"" so pulled the sump and found the missing bit. Taped oil return from turbo while it was apart.
Made an intake today
Title: Re: Lazy's new 3 metre
Post by: Ross Goldsack - JBNZ Immediate Past President on September 03, 2020, 07:27:19 AM
pretty much finished the inlet/intercooler, just a few touch-ups on the welding that the QC dept pointed out......🤦‍♂️
Title: Re: Lazy's new 3 metre
Post by: Ross Goldsack - JBNZ Immediate Past President on September 09, 2020, 18:47:33 PM
Started on the hull.

Title: Re: Lazy's new 3 metre
Post by: Ross Goldsack - JBNZ Immediate Past President on September 16, 2020, 18:38:15 PM
Got a bit more progress done  b>
I had to shorten the driveshaft by 125mm, the first attempt caused a bit of stress as it was too tight and I couldn't get it pressed together before the temperatures equalized  C"" C"".
My engineering advisor had put me crook by telling me that 0.07mm interference would work...... anybody with any idea would know 0.06mm is optimum. Second attempt worked well and ended up nice and straight.
The hi-lift jack was called into action to bend the 10mm delta for a nice smooth lead in to the intake.
Title: Re: Lazy's new 3 metre
Post by: rogee on September 22, 2020, 18:43:45 PM
nice work !!
is there a bearing in the shaft through tube  or just seals?
Title: Re: Lazy's new 3 metre
Post by: Ross Goldsack - JBNZ Immediate Past President on September 22, 2020, 20:43:57 PM
Quote
is there a bearing in the shaft through tube  or just seals?

There's 1 bearing and 4 seals, they are held in a little carrier that is gunked into the intake tube with mastic to allow a small amount of movement and absorb vibration.
Title: Re: Lazy's new 3 metre
Post by: Ross Goldsack - JBNZ Immediate Past President on October 04, 2020, 18:33:53 PM
I haven't spent much time on the boat lately but will post a few photos of where we're at.
We got the unit aligned and finished mounting the engine.
My lad James is pretty proud of his handiwork... he's finished machining the steering helm b>
Tacked up the rest of the hull, just the screen to go. All straight, square and almost up to the standards set by Mohawk Marine  8)
Title: Re: Lazy's new 3 metre
Post by: Allen M on October 05, 2020, 07:40:30 AM
I haven't spent much time on the boat lately but will post a few photos of where we're at.
We got the unit aligned and finished mounting the engine.
My lad James is pretty proud of his handiwork... he's finished machining the steering helm b>
Tacked up the rest of the hull, just the screen to go. All straight, square and almost up to the standards set by Mohawk Marine  8)
Looks like James could become some stiff competition for Jeffjet if he keeps that standard up b>
Title: Re: Lazy's new 3 metre
Post by: Kakapo76 on October 05, 2020, 08:53:28 AM
Thats some pretty looking lathe work! nice one- its coming together nicely.  *-)
Title: Re: Lazy's new 3 metre
Post by: Ross Goldsack - JBNZ Immediate Past President on May 16, 2021, 15:57:27 PM
October was the last update on this build......because nothing has been done until the last few days.
Hull welding is nearly complete, I made a little rolling steady for tig welding the outside corners. It worked OK and improved appearance from 2/10 to 2.5..... I'll grind welds and may even paint this boat for a change  :o
Screen is tacked on, came out pretty good considering the kit supplier provided no instructions or templates, that's what you get when dealing with backyarders.

Title: Re: Lazy's new 3 metre
Post by: Jimmy Jet on May 16, 2021, 18:05:30 PM
Not too much wrong with your welds Lazy. Don't grind them off, it will end up cracking (unless you put a big weld prep on?). Paint will pretty them up more as well.
Title: Re: Lazy's new 3 metre
Post by: Jeff B on May 17, 2021, 05:45:14 AM
That looks like a professional build  jaw
Paint?? Does that mean you are going to look after this boat and not scratch it??
Title: Re: Lazy's new 3 metre
Post by: Ross Goldsack - JBNZ Immediate Past President on May 17, 2021, 12:36:42 PM
Jimmy, I've run a dirty big mig bead on the inside so hopefully they don't crack.
In saying that my last boat has cracked where the dash meets the side and both rear corners too 😑 That was mostly from following Karl in that nasty river at Franz Josef.... at least I didn't smash right through my seat 🤣🤣🤣.

Any tips on preparing alloy for painting?
Title: Re: Lazy's new 3 metre
Post by: Jimmy Jet on May 17, 2021, 16:35:12 PM
Correct primers and prep with alloy is absolutely key to getting a lasting finish that won't just flake off.
Defo worth consulting a supplier for advice (Linkup paints etc) on a complete system.
Rubbing down all areas with scotchbrite until the finish is totally flat (as in no shine) is a good start. Use soapy water as you go which is a first stage of decreasing.
Title: Re: Lazy's new 3 metre
Post by: Jimmy Jet on May 17, 2021, 17:53:52 PM
Or check out a price to get it wrapped?
Title: Re: Lazy's new 3 metre
Post by: Ross Goldsack - JBNZ Immediate Past President on May 20, 2021, 16:08:43 PM
Making a little progress now.
The screen is fully welded and sanded off, dash sorted out and steering helm welded in. Played around with steering and reverse set up, I've copied the Jeffjet style of bellcrank as I'm really tight on space at rear of engine..... I don't know who shortened the driveshaft so much???
Title: Re: Lazy's new 3 metre
Post by: steelo on May 20, 2021, 16:18:37 PM
Great work. Keep up the pics and commentary.
Title: Re: Lazy's new 3 metre
Post by: Ross Goldsack - JBNZ Immediate Past President on August 21, 2021, 15:53:22 PM
No progress for soooo long and then for some reason I've found a bit of spare time over the last few days...... ::)

Bucket seats were thrown out and gone back to a bench seat, still got a few finishing touches ✔
Fuel tank done with pump and filter mounted ✔
Forward/reverse leaver done ✔


Title: Re: Lazy's new 3 metre
Post by: Jeff B on August 21, 2021, 19:34:42 PM
About time you did some work on it.
This turbine housing has been sitting here waiting for ages....
Title: Re: Lazy's new 3 metre
Post by: Ross Goldsack - JBNZ Immediate Past President on August 22, 2021, 10:52:07 AM
Quote
About time you did some work on it.
This turbine housing has been sitting here waiting for ages....

It's probably still too hot to touch  ::)
Thanks, it looks great and the quality welding will fit in nicely with my workmanship  O))))
Title: Re: Lazy's new 3 metre
Post by: Ross Goldsack - JBNZ Immediate Past President on August 31, 2021, 15:39:06 PM
Nothing very exciting to post but the boat is slowly coming together.
I've just remembered why painting boats isn't high on my list of favorite things to do.......
Title: Re: Lazy's new 3 metre
Post by: Ross Goldsack - JBNZ Immediate Past President on September 06, 2021, 19:56:26 PM
All painted and pretty.... sort of. As I'm a bit rough on my boats I didn?t want to fill it with bog, so just did the bare minimum of filling and kept it thin
Nice from afar but far from nice.
Title: Re: Lazy's new 3 metre
Post by: Kakapo76 on September 07, 2021, 08:54:55 AM
Looks a darn sight better than mine- very inspiring! What primer did you use (was it an etch?)?
Title: Re: Lazy's new 3 metre
Post by: Ross Goldsack - JBNZ Immediate Past President on September 07, 2021, 15:28:34 PM
No etch required  :o 

I used PPG 3450 2K HP Epoxy primer and 2K Caprithane top coat.

The paint supplier told me that with these Epoxy primers no etch coat is required. I hope it was good advice! The data sheet backs it up and states that the only prep for alloy is to wipe down with 50:50 meths/water.
I might have looked a bit doubtful, as he dug out an email to the company that paints Shotover boats, time will tell.
 
Title: Re: Lazy's new 3 metre
Post by: Ross Goldsack - JBNZ Immediate Past President on September 07, 2021, 15:32:44 PM
Paint prep spec
Title: Re: Lazy's new 3 metre
Post by: Jimmy Jet on September 07, 2021, 15:50:22 PM
Looks mint! Choice colour.
Title: Re: Lazy's new 3 metre
Post by: Kakapo76 on September 07, 2021, 21:28:07 PM
Looks mint! Choice colour.

 I see what you did there!  ;)