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kingsley

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1979 Hallett Sprint
« on: January 14, 2023, 10:17:10 AM »
Jet boats.  I had my first experience on the Niagara river, a short trip on a friends boat that ended with me holding some damaged wiring away from the alternator belt with a pair of pliers while getting back to the launch ramp.  It was a blast, I was hooked.

A year or so later, I'm in West Virginia buying my first jet boat.  It's a project, no engine, mismatched trailer, but otherwise complete with some extra parts and it's what I can afford.

My intentions? "This isn't too bad, I can do some minor work, drop a motor in and go."  Let's just say that escalated into an "I'm redoing literally every single bit of this boat" in a multi-year project that I have been working on while living at 3 different houses in 2 states, getting married, and many other happenings in life.  I'm now in TN, currently dealing with some not enough garage space issues, but getting back into working on the boat.

Late 2016 I buy the boat and drag it back home to just outside Buffalo NY.  Not a fan of the checkerboard or some other things, but its lime green, one of my favorite colors.  The previous owner named the boat "shake n bake" but removed the name before I purchased.  I have no idea if there is a different name hiding under the paint, but I plan to find out before any kind of name goes back on.
« Last Edit: January 14, 2023, 10:20:07 AM by kingsley »

kingsley

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Re: 1979 Hallett Sprint
« Reply #1 on: January 14, 2023, 10:27:54 AM »
I had a few months before winter so I started out by working on the trailer.  I shortened it almost a foot, adjusted the bunk locations, replaced the fenders, steps, hitch and winch post.  I also added a mount for a spare tire that I later find out that I can't get the spare tire in/out, so that needs to be redone.  I also redo all lighting, wiring, suspension, have the frame blasted and painted, basically an all new trailer.  By the time I finished I was into the next year (winter pause halfway through).
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kingsley

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Re: 1979 Hallett Sprint
« Reply #2 on: January 14, 2023, 10:33:33 AM »
To get the trailer out for blast and paint, I made a wooden cradle for the front and suspended the rear with an engine hoist.  Jack stands underneath as a "just in case".  Looking back I cringe at those jack stands, I later came up with a better method of supporting the boat when it came back off.

The axles were cleaned up and reused, but the springs, shackles and hardware are all new.  New hubs, wheels and tires, but reused the bearing buddies.
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kingsley

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Re: 1979 Hallett Sprint
« Reply #3 on: January 14, 2023, 10:39:13 AM »
In my spare time I also worked on sorting through what parts I will use and get cleaned up.  I also picked up an air scoop that matches the style of the hull and had a friend do some paintwork on it.  I still need to make a base/mount for the air scoop.  When the kitten was younger he also found the scoop to be an awesome fort.
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kingsley

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Re: 1979 Hallett Sprint
« Reply #4 on: January 14, 2023, 10:47:31 AM »
Next up I found an engine for the boat, a complete gen 6 big block chevy 454, out of a 2500 pickup.  I stripped it down to a long block, had a buddy freshen up the short block and I got a different camshaft, intake and valvetrain parts.  Heads were machined for the higher lift cam.  We found out the motor must have hydro locked, one cylinder down but we found an oem replacement for the piston rod and moved on with the rebuild.  Unfortunately, while waiting on a backordered oil pan from jegs my garage had sweated during a winter warmup, leaving all exposed areas of the internals to flash rust.  Not once, but multiple times.  Disappointing, but I've since chalked it up to an expensive learning mistake and moved forward.  The engine later got dropped off at a machine shop, but I more or less parked it in the corner for a while.
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kingsley

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Re: 1979 Hallett Sprint
« Reply #5 on: January 14, 2023, 10:53:16 AM »
By this point I've moved into my new house, 1 door down.  Pretty excited because the boat actually fits in this garage.  After a bit of down time I'm back at it, somewhere around 2018.  The boat came with two Berkeley JC-A jet drives, as well as a manual place diverter.  At this time my parents are living in NH, and I find a complete JC-G jet pump out there.  They pick it up for me and I grab it while visiting.  I also pick up a new place diverter shifter, straight snoot, as well as win a droop snoot in a raffle so I have some options to try on setup.  Everything gets powder coated white, but I fail to realize certain surfaces can't get powder coated so I have to wet sand some parts to get them to bolt up properly.  Around this time I also meet the guy that runs the Allegheny river rats boat club in the southern tier of NY and western PA.  Cool dude, has an awesome shop.  He machined the intake and a shoe for me, as well as built a ride plate.  In addition, helped me reassemble the jet drive and get it ready to bolt into the hull when I'm ready to do so.
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kingsley

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Re: 1979 Hallett Sprint
« Reply #6 on: January 14, 2023, 11:00:30 AM »
While collecting parts I decided to make my own rail kit and ditch the cast mount setup.  I referenced the specs of the rail kit on lightning headers when getting material.  2.5"x2.5"x.25" angle, 3/8" thick plate, all 6061 t6 aluminum.  I found a drawing of a big block chevy online for locating bolt holes, verified locations on my engine and then started drawing the templates in CAD.  Print, tape and cut out the mounts with a jig saw.  Put a sanding drum in a drill press to square off the cuts then used a router with an 1/8" bit to give a radius.  Angle blocks I found on ebay, but might replace these later.  I plan to make most of the additional mounts and brackets for the boat myself, and plan on picking up a tig welder as that will be needed later for some of the work.
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kingsley

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Re: 1979 Hallett Sprint
« Reply #7 on: January 14, 2023, 11:14:56 AM »
By this point I couldn't procrastinate any more and needed to start digging into the fiberglass.  There's a couple reasons for the procrastination.  First, I had zero clue what I was doing.  Second, I discovered the boat was not as solid as I thought it was.  When I bought the boat there was one section on the right stringer that was delaminating.  No big deal I thought.  Well, turns out a previous owner replaced this stringer and used pressure treated.  Not good, has to come out.  I also found that the left stringer, while original, had some rot in the rear near the engine mounts.  Figure might as well yank it all out.  While the stringers are out, I found some moisture damage in the transom, which you'll see is worse than expected.  Also, the top of the boat was removed at some point and reattached terribly.  Here we go...

Removal of the paint, glue, etc. was done with an angle grinder and flap disc, as well as a palm sander.  A multitool with cutoff blade and sawzall got most of the stringers out.  I also used a chainsaw to dig out some of the left stringer, and a mini belt sander and die grinder worked well for the tight spots.
« Last Edit: January 14, 2023, 11:17:13 AM by kingsley »
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kingsley

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Re: 1979 Hallett Sprint
« Reply #8 on: January 14, 2023, 11:29:09 AM »
When I started cutting out the transom I discovered something really interesting.  The layers of fiberglass on the outside of the transom actually started delaminating from itself.  Yikes.  At this point I paused and started doing a lot more research, searching youtube, etc and found some good info that definitely helped.

Also some tips; skip the paper mask or half mask when grinding fiberglass.  The respirator with the face shield is a game changer.  100% more comfortable.  Also, I found the white jumpsuits to be a waste, they rip too easy.  A pair of old heavy jeans and hoodie, gloves, hat and deal with the heat works out a lot better for keeping the itching down.  Use a shop vac whenever possible to suck the mess up while you are working, not after.
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kingsley

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Re: 1979 Hallett Sprint
« Reply #9 on: January 14, 2023, 11:51:57 AM »
Fixing the transom.

I found a youtube channel, boatworkstoday.  This channel has been a huge help for me, highly recommend.  This channel not only shows how to do certain tasks, but helped me in selection of materials.  I'm out east, and without much for local sources I have been ordering just about everything for fiberglass through jamestown distributors.  1708 and 1700 glass, totalboat epoxy resin, fairing compound, silica and chop.  The coosa board is from a place in FL and supplies like chip brushes, fin rollers, gloves and stir sticks (tongue depressors) are from amazon.  I opted for epoxy because I didn't know all history of the boat and since it was already painted, I felt epoxy would be the strongest method to use.

After all of the transom wood was removed, I bolted a piece of plywood to the outside of the boat and started removing the inside layers of fiberglass that had delaminated.  The plywood had packaging tape on the face to reduce chance of it getting stuck to the hull.  I had sections of hull that were about an 1/8" thick here and very weak, so that plywood was important.

After removing the delaminated sections, I ground the edges to as best of an angle as I could and started tracing for the 1708.  I glassed in the 1708 with epoxy resin, and got everything within 1/16" of flat.  I then used epoxy fairing compound to get everything completely flat.

Next up I made a template, then cut out the coosa board.  The coosa was fitted, rounded the edges, then sanded and prepped to go in.  I mixed up some thickened epoxy and set the coosa, clamping it down.  After that had cured thickened epoxy was used to give a filet around all edges.

A final sand, then 3 layers of 1700 went over the coosa.  I trimmed the edges around the hole for the jet drive, and will later seal this up with epoxy.
« Last Edit: January 14, 2023, 11:56:37 AM by kingsley »
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kingsley

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Re: 1979 Hallett Sprint
« Reply #10 on: January 14, 2023, 11:57:56 AM »
More photos of the transom work.
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kingsley

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Re: 1979 Hallett Sprint
« Reply #11 on: January 14, 2023, 12:15:35 PM »
Next up was stringers.  I first got the boat off the trailer, supported under the bow and two jackstands at the rear corner, making sure the boat was level left to right.  I modified the stands with threaded rod, nut and plate welded together for adjustment and a 2x4 on top to spread out the load.  These worked out great.

I picked up two 2"x8"x16' kiln dried douglas fir, picking the best grain orientation and straightest material I could get.  The hull got a final sand and prep and the stringers were fitted.  I used 1/8" ply and an angle finder to determine the fit and chamfer on bottom of the stringer to get a nice fit.  A string line was ran from transom to bulkhead to determine height, based on measurements I took before tearing the boat apart.
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kingsley

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Re: 1979 Hallett Sprint
« Reply #12 on: January 14, 2023, 12:20:07 PM »
The stringers got a radius on the edges and top then coated in epoxy.  I also made some supports to keep them straight and locate weight for when they go in.
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kingsley

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Re: 1979 Hallett Sprint
« Reply #13 on: January 14, 2023, 12:28:17 PM »
Next up the stringers got a final sand and then bedded down using thickened epoxy.  I also added a filet of thickened epoxy at the same time.  The stringers were done one at a time to make things easier.  When I got to the second stringer I also learned to start using painters tape as an "edge" to limit how much area outside of where I was working needed to be sanded after.
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kingsley

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Re: 1979 Hallett Sprint
« Reply #14 on: January 14, 2023, 12:42:47 PM »
Now that the stringers were bedded it was time to get some glass laid down.  I built a platform that I could move and lay on to reach inside the boat where I couldn't reach from the outside.  The last thing I wanted to do was step inside the hull and do damage this far along.  The stringers got a few layers of 1700.  I did this in sections to make it easier and overlapped all joints, going smallest to largest to increase the surface area that each layer was bonding to.  After all work inside the hull is done I'll do one final layer of 1700 over everything to make sure its all nicely tied in together.

At this point I not only realized that the deck needed to come back off the boat, but I also would be replacing the front bulkhead after finishing glassing the stringers how I wanted.
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kingsley

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Re: 1979 Hallett Sprint
« Reply #15 on: January 14, 2023, 12:51:16 PM »
So when I said the deck was previously reattached poorly, what I mean is I could grab ahold of the single layer of glass tape and rip it off with my hands.  So next I removed all rub rail, cut through the tape I couldn't easily rip off, cut through the tabbing at top of bulkhead, and lifted the deck off.  I used ratchet straps and some furring strips to get this up in the air and hung from the rafters.  I cut out the bulkhead around the stringers to give more room to glass those in, and finished glassing the stringers.  While letting things cure, I also filled in the gas tank mount holes with thickened epoxy and 1708.  I'll address the bottom side of those when the hull is flipped over.
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kingsley

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Re: 1979 Hallett Sprint
« Reply #16 on: January 14, 2023, 01:02:09 PM »
Now that the deck was off the boat I decided the best way to prep that for reattachment was to flip it over.  While it was flipped over I also decided to replace all plywood in the dash and gunnels with coosa and the cardboard tubes with pvc.  Note that I also filled in the holes from the old water discharge locations.  These previously were out the side directly above one of the cleat locations.

Like the transom, the coosa was fitted and set with thickened epoxy and thickened epoxy was used to create a filet along the edges.  I used 1 layer of 1700 overtop.  The pvc tubes were flame treated, sanded and epoxied in with fiberglass tape.  The mini belt sander was very helpful working in the gunnels. 
« Last Edit: January 14, 2023, 02:16:15 PM by kingsley »
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kingsley

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Re: 1979 Hallett Sprint
« Reply #17 on: January 14, 2023, 01:04:06 PM »
More photos of underside of deck work.
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Hallett86

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Re: 1979 Hallett Sprint
« Reply #18 on: January 14, 2023, 01:37:20 PM »
Love the build. Awesome work. I dig the coosa board. I wanted to go that route but I could not get it here in so cal.
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third degree

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Re: 1979 Hallett Sprint
« Reply #19 on: January 14, 2023, 08:03:41 PM »
Very very nice. Good job so far


Sent from my iPhone using SoCal Jet Boats mobile app
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kingsley

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Re: 1979 Hallett Sprint
« Reply #20 on: January 25, 2023, 08:01:46 PM »
Thanks guys.

I love the coosa board.  When I ordered it I did have to pay for a freight charge and pick up at a local shipping hub, but it has gone up in price quite a bit since.  I'm saving and using every little scrap of it that I have.
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kingsley

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Re: 1979 Hallett Sprint
« Reply #21 on: January 25, 2023, 08:22:01 PM »
At this point it was time to put the deck back on the boat, but first I sanded and prepped as much of the seams and anywhere else I would need to get at for reattaching.  In addition I got out all the old brittle resin and whatnot that was sitting inside the bow from previous poor work.  Fortunately it didn't take much to get things lined back up, the hull kept its shape quite well.

I used ratchet straps to hold the top and bottom together, then taped the seam for a backing when glassing the seam back together so I didn't get epoxy resin all over the outside of hull.  On the inside I used 2 layers of fiberglass tape, (1) 4" then (1) 8".  I started at the back and worked my way to the front.

At one point while working the power went out for a few hours, but not wanting to stop mid way I just started working in the dark with a flashlight.  Somehow still tuned out great.  From the transom to the bulkhead in one day, and in the bow a couple days later.  Squeezing through the bulkhead to glass up inside the bow was not fun.
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kingsley

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Re: 1979 Hallett Sprint
« Reply #22 on: January 25, 2023, 08:24:06 PM »
More photos of reattaching the deck.
« Last Edit: January 25, 2023, 08:30:23 PM by kingsley »
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kingsley

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Re: 1979 Hallett Sprint
« Reply #23 on: January 25, 2023, 08:36:58 PM »
Now that the hull was back together it was time to replace the bulkhead.  I had been trimming away at this to work but didn't want to take it out yet to keep some strength and shape in the hull while it was apart.

After removal it was more sanding and prep.  I used some underlayment scraps leftover from the stringer templates to piece together the shape for a template, using hot glue to piece it together.  I transferred this to the coosa, cut out and test fit, then added some holes for access.  All edges were rounded and it got sanded and prepped for a layer of fiberglass on each side.  I use a router to give a nice radius on the coosa, but still go back over with sandpaper by hand.  Like elsewhere, 1700 and epoxy resin was used for glass.
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kingsley

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Re: 1979 Hallett Sprint
« Reply #24 on: January 25, 2023, 08:39:19 PM »
More photos of the bulkhead
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