I'm starting to like Jet drives

[cooperider]

This is going to be way harder than the 1 stringer system in the Enticer but I think I can pull it off over time. I don't have a garage to keep it is so it's going to be hard as heck to work on. I really don't want to paint it so a salvage job on the finish was what I had in mind. What do you suggest I do to save the top half. 600 wet then 1000 wet then compound then polish? Is that the best way to go? Thanks Coop!

A sanding and then polishing is definately where I would start.


Until I get a bigger shop I am thinking about getting one of those freestanding carport things. To keep things out of the weather. I figure if the Germans can build WWII jetplanes in a tent in the forest, then I should be able to put a floor in a boat. Plus way better ventilation.

 

[wickedrister]

Salvage Jet Project

Started stripping the Carlson today. Got everything off and out except the rub rail and the pump pulled. All of the pump bolts are out and the grate is out but the pump is really sealed in tight. Looks like it is going to take a few hours with a putty knife to free it from the hull. Man is she in bad shape, it looks like it would be best to take the top cap off. The stringers and floor under the front deck are bad and that low deck makes for some really tight work space. Coop what is the best way to support the hull on the trailer to try and keep it true? How about running some 2x12's down the hull like bunks connected to the trailer? Will that help support it's shape when it is capped and gutted? Any suggestions? Thanks Fred.

 

[wickedrister]

9:00 am to 4:00 pm

That's how long it took to get the darn pump out! Well if I sat in the same place for 28 years I would be hard to move as well.

 

[wickedrister]

cvx20 repair

What was I thinking! This boat is a total mess! I spent all day cutting out wet wood and only got about 1/2 of it out.

 

[wickedrister]

cvx20 repair

The transom is going to need a pile of work as well. I will need to remove all the foam before I can tell how bad it really is. This thing was built like a tank!

 

[wickedrister]

cvx20 repair

The windshield supports and grab bar are a few of the important things that were salvaged when we first stripped all the hardware off the boat. I also saved the coast guard information plate, the steering wheel, steering helm and the factory shifter. They cleaned up nicel for nearly 30 years old parts.

 

[wickedrister]

All of the foam is out and most of the bad wood

 

[Big Dave]

Shape a single 2X12X20ft to fit that stringer-much stronger than new.
had to do that on the cvx21 jet I had
The jet drive sat much further forward in the boat than yours.
had the impeller at A+ trim, would turn 5200 rpm w/built 455 olds
put 5 motors in it on maybe 20 hrs run time( broke 4 cams in 3 places each)

 

[cooperider]

I looks like you are doing great on the salvage. As far as bracing the bottom, its different for every boat.

 

[wickedrister]

Rotten Rotten Rotten

That is marine-tex not wood you are looking at and the dark places are the hull or outer shell. Help Coop Help!

 

[wickedrister]

Question for Coop or anyone who knows boat building

How do yall feel about Klegecell or Divinycell rather than wood for rebuilding everything except the stringers? Seat boxes, storage boxes, transom filler "remember it's a jet", engine housing, hatches, floors or what ever. I'm looking at the west systems epoxy resin with the slow hardener for a longer working life and looking at using some light weight materials rather than marine plywood. Do you think this is a good idea or do I need to stick with old school methods? I met a man that is rebuilding a 47' Chris Craft and he has used a bunch of Klegecell in his boat and it seems to work fantastic. Does anyone have some input or suggestions on this subject? Thank You Fred!

 

[cooperider]

That is marine-tex not wood you are looking at and the dark places are the hull or outer shell. Help Coop Help!

Is that a putty or something I see? It looks like they used it to bond the transom to the hull. Looks like they had a few voids. If the rest of that stuff is intact, then fill the voids and bond the new wood over top of it.

 

[wickedrister]

CVX20 Repairs

Hi Coop. Yes as best I can tell that is Marine-tex across the left side. That pink bondo looking filler that is hard as rocks. That crap was all over the place up under the floor in my Checkmate when I fixed it. My plan is to cut along the floor and up the right side to free the rest of the old wood, clean every thing up, fill and smooth out any voids then cut my templates for the new wood or divinycell. Think I will also score a bunch of cross hatch marks in the old bonding material so the new stuff can get a good grip. Now my question is this. Should I use Marine-tex to bond the new material to the transom before it is glassed in or is there a better bonding agent than Marine-tex for that job? I ordered some West Systems 105 epoxy resin and the 206 slow 20min hardener today. I plan to use this insted of standard poly resin to finish in every thing. Hope I like how it works, it better work good for what that stuff costs. Thanks for looking Coop! Fred

 

[wickedrister]

CVX20 Repairs

I had to rebuilt the controller for the jet-o-vator. It was rusted away so bad that only it's guts were left. I think it turned out good. Dig the chrone skull

 

[Wowchad]

Wow what a project you have going there!

I have not posted here in some time but after I got a happy birthday email I thought I come by and see what's going on here.

Still plenty of Baja bashing but a jet boat resto I can't resist!

Those CVX jets are nice boats. It's too bad people can't keep the water out of them hey?

Go over to Banderlog.com and you'll find tons of jet boat minded VERY friendly people. You would get quite a response on your project over there.

I almost copied that pic of you holding your Berk with the boat in the background...Great photo!

BTW you did a fantastic job on that lever too.

Later, Chad

 

[wickedrister]

Cables

Wow what a project you have going there!

I have not posted here in some time but after I got a happy birthday email I thought I come by and see what's going on here.

Still plenty of Baja bashing but a jet boat resto I can't resist!

Those CVX jets are nice boats. It's too bad people can't keep the water out of them hey?

Go over to Banderlog.com and you'll find tons of jet boat minded VERY friendly people. You would get quite a response on your project over there.

I almost copied that pic of you holding your Berk with the boat in the background...Great photo!

BTW you did a fantastic job on that lever too.

Later, Chad

(Thanks Chad I added your link to my favorites list)

 

[cooperider]

Wow what a project you have going there!

I have not posted here in some time but after I got a happy birthday email I thought I come by and see what's going on here.

Still plenty of Baja bashing but a jet boat resto I can't resist!

Those CVX jets are nice boats. It's too bad people can't keep the water out of them hey?

Go over to Banderlog.com and you'll find tons of jet boat minded VERY friendly people. You would get quite a response on your project over there.

I almost copied that pic of you holding your Berk with the boat in the background...Great photo!

BTW you did a fantastic job on that lever too.

Later, Chad

Is this the same wowchad that I end up bidding against on eBay so much?

 

[jrumon]

Cool old jet...

YES...heavier than a Checkmate hence why they "handled better"...
slower and could handle rougher water a bit better. These were 55mph boats without the jet trim... maybe 60 on a perfect day with it.

My 18 Jetmate (460/berkley) was a solid 65+mph boat and a LOT of fun... pulled a skier harder out of the hole than ANY of my friends Mastercrafts!!!

Jets have their + / - but they are a BLAST to play with!!!

Looks like a fun project, but better take stock in the gas companies!!!

Here's a dream of mine....
HOW ABOUT A LATE MODEL TURBO-DIESEL WITH A JET PUMP???

 

[Big Dave]

I talked to Berkley when I was rebuilding my cvs20 years ago, and they said that at 5000 rpm, the jet drive is just idling!!! A Diesel runs wide open at 2500 to 3500 rpm--- you would need a major step up to speed up the input shaft to a reasonable rpm. Main limiting factor is being able to keep the pump loaded at the higher rpms without creating too much drag.

 

[jrumon]

Hey Big Dave...

The JET PUMP is a largely adaptable unit. I think who ever was giving you info at Berkley was pumping their product, but not the facts...

YES, the pumps can withstand bigger RPM, but the higher you spin them, the the effeciency falls off and the impeller cavitates.

Most jet pumps are set up with an impeller to run at 5000 rpm.. it is the sweet-spot for gas motors reaching peak torque and horsepower.

For a diesel to work well, you could change to a "higher pitch" impeller which pushes more water at a lower RPM, or go to a 1:1.5 shaft speed "multiplier box" to get the pump speed up to where it needs to be.

Most of the newer diesels make peak power at 3000-3500 rpm, but the torque is unreal and the fuel effeciency would be sweet!!! I also know that many diesels are using the big Hamilton jet pumps... Take a look at SPECS for the HINKLEY boats... 34'er, a single 440hp Yanmar diesel with Hamilton jet... putting a 10,000lb boat near 40mph with incredible performance and still gets good fuel economy! Sweet deal if you can afford it...

I just think the whole diesel/jet thing is an unexplored avenue for boatbuilders.