Smokeysevin's juryrigged standup (js550) project

[steve45]

Very nice!

[smokeysevin]

Old minor update. Added tank pads, waterbox beauty rings, waterbox back strap, front fill cover, tank turf, tank straps.

Sean

[smokeysevin]

Sean Scrambles to Satisfy Standup Success (general assembly and progress update)

Time Spent:
36 Hours (over a few days.)

Tools Used:
90% of my stock

Tools Properly Put Away:
54%

Materials Used:
Who knows at this point? I have sure as hell stopped keeping track of what it has cost...

PPE Used:
Appropriate for Tasks
Safety Sandalls

Number of scratches added to fresh paint: 16

Total swear words directed towards jetpump/shoe: 750,469

Percentage complete:
60% (I think I am starting to get over the hump on this, it is getting really close but I know the last 10% takes 90% of the time which is why I plan to sneak up on it by convincing myself I am really only 60% there. Crazy like a fox)

I have finally started tossing stuff back together, summer is getting long in the tooth and I am sick of this thing being strewn across my garage, not making brapp noises.

Last week I got the motor torn down. I gave the jugs a quick flogging with a dingleball hone, then thoroughly flushed them in the parts washer. The crank got new seals and new piston pin bearings. The pistons got dunked in the ultrasonic cleaner until they were decarboned and then tossed onto the crank with new rings. The motor got all new gaskets thanks to our friendly neighborhood @JetManiac and I pressure tested until it held as intended (Big Pin 750 Rebuild Quesitons).

While I was waiting for the threebond to dry on the cases, I rebuilt the pump with a kit I picked up from @brapperdoodle (gracias amigo) and learned how weird the 750 pumps are compared to modern setups. I only had to take the pump apart once to figure out what was wrong so that was nice. The pump got stuffed with a 10/16 Hooker (750 Swap Prop Recommendations)

I got some shiny new cooling line fittings and placed an order for my "fuel line" to connect the cooling system up but that got held up in USPS limbo. (Cooling Line Recommendations)

Even though I had already installed glued in, and flared the cooling lines on the inside of the hull, I had done none of those things on the outer section. That made things super fun to cut and flare the lines with the limited space in the tunnel space... I ended up "clearancing" my flaring tool with my angle grinder so now it is a custom tool. Something tells me I won't get my tool deposit back from o'reilly's anymore if I were to try and take it back.

Installing the jet pump proved to be a massive pain, the gasket on the front of the pump REALLY didn't want to slide nicely into the shoe, I ended up using some RTV to glue the gasket to the pump, then add a slight lead in chamfer to the gasket. I also added a slight lead in to the shoe which was a tricky thing to do since it was already glued to the hull... not too bright of a move on my part. There is almost no room to install the pump hardware once the cooling lines are installed. I found out after installing the pump that I had cut the cooling/bilge lines longer than I should have so fitting that hose is going to be a real pain but it should be possible without pulling the pump. Learn from my mistakes on this one...

To stay busy, I started working on throwing stuff together again. I got my coil plug leads sleeved and terminated with self-extinguishing wire sleeving from wirecare and new MSD plug ends from Jegs. Hopefully I did the plug leads right, this was my first time doing them but it seemed relatively straightforward.

That stuff done, I checked over the motor and found out I had the wrong starter bendix (I had swapped it with a kawi 4 stroke one which spins the opposite direction) installed so I got to take the flywheel back off and replace it with the OG that came with the motor. The cold fusion flywheel lock came in handy so I am glad I kept it.

Crisis averted, I started fitting the controls and upper pole vent/passthrough. The stock tube was drilled out and removed and I had originally planned on using some kanaflex but the specific version that I bought (a year or so ago...) was too stiff and I didn't like how it popped when the pole went from fully down to slightly up. I ran to holmes depot today and picked up some 1-7/8" ridgid shop-vac hose and set to work making that make sense. I ended up chopping the "threaded" section of the coupler off, sanding the OD down to fit inside a 1.5" long section of 2" ID silicone connector then smushing that into the hole I cut in the pole mount. The vacuum hose itself is about 1.5 feet long and is free fitting inside the 2" SCH 40 pvc pipe I replaced the stock tube with. To install the pvc pipe I had to add a clearance recess into the lower section of the pole and "persuade" the tube in. I then took a 2" pvc coupler and coped it at an angle to match the angle of the inner pole structure to give the new tube something I could attach it to the pole with.

Once I was happy with that, I grabbed one of the many kawi runabout start/stop switches and spliced an extra 1.5 feet of wire in the middle then sleeved it with braided shielding. The kill switch wiring, 750 throttle cable, and steering cable were then run down the tube and the pole was installed along with one of the wax racing pole locks. I have a 2000 seadoo XP choke cable on the way to wrap up the controls side of things.

Remaining Items:

cooling line install
fuel line install
stinger outlet install
wiring
bilge pump
battery cables
reinstall vin plate (removed for painting and because it fell off...)
install other side graphics
install rego numbers
throttle/choke cable mounts
cut/seal exhaust tube
fab/install opposite side "exhaust" blockoff plate

Sean


2" Sch 40 24" long tube


Tube Clearance and Hose Spec


Installed Stickout


Coped Locking/Locating Flange


Installed Passthrough


Vacuum Hose "threaded section"


Hose Clearance and Install


Pole Lock from Wax Racing


Bolted in and aligned and sleeved coil installed. I did have to clearance the aluminum bedplate because the stinger coupler for the exhaust is really big.


Room for activities? Ignore the non-stuck hood seal...


Purdy.

[steve45]

Looking good! Don't stop now!

[smokeysevin]

Wiring is done! "Modern kawi spec" with oe on/off switch, all oe style sumitomo sealed connectors, and "open concept" mounting. All the components are potted and fully sealed so should hold up to the hull environment. Fingers crossed, this will hold up as well the 4 strokes do.

I also fabbed up a throttle and choke cable mount and installed a 98-2000 seadoo xp choke cable to go with the 750 sxi throttle cable. I am currently waiting on the umi throttle cable adapter before I can get that wrapped up.

Wax racing bilge switch mount with blowsion rotary switch, and rule 500 auto bilge installed to keep the water out.

Side note: wiring is really hard to take pictures of, especially when it is fully installed...

Remaining items:

Seal driveshaft fitting
Install bilge pump mount on hull
Trim and glue exhaust tube in place
Install fuel tank straps
Install battery straps
Trim choke cable
Fab upper choke cable mount
Install fuel tank and fuel lines
Install exhaust hose clamps and bead roll tubes
Weld exhaust stinger for 2" pipe
Glue exhaust tube in
Seal sponson mount access hole

Goal is to be water ready in 2 weeks.

Sean

[steve45]

Amazing!

[smokeysevin]

Soon

Sean

[steve45]

It's ALIVE!

[smokeysevin]

It's ALIVE!

It is really close now. I have lots of little detailwork to wrap up but that was a big milestone for me.

Super good way to end a wednesday after work!

Sean

[smokeysevin]

Welp, I went out on sunday to try and give this puppy a go and was greeted with this.

I am looking at these tanks as an option but am open to other suggestions. It looks like I could use 12"L x 12"W x~15+"H but that is rough numbers based on the tank not actual clearance to the hood the 12x12 are probably hard maximums.

https://www.jegs.com/i/JEGS/555/15310/10002/-1

https://www.jegs.com/i/JAZ-Products/547/250-004-NF5/10002/-1

Sean

[steve45]

Bummer! Looks like it got cold and the air couldn't get in. Guess you might have to crack the filler cap during storage.

[smokeysevin]

I received my H2O Designs 3 gallon Jazz tank in from Fast Elements today. It fits really well even using the stock straps. I need to replace my fuel lines that are now slightly too short and put a layer of turf on the bottom of the tank but it looks like the fuel fiasco has been fixed now.

On the other hand, I blew up the rear diff on my truck while on the boat ramp during the last outing when I found out the tank was cracked, then got the rona' over the weekend so testing is going to be on hold for at least a week plus ~500 miles of light driving to break in the new gears on my tow rig... it is always something.

Sean
















Hey there little worm gear, what are you doing sticking out?


Truetrac, more like true crack... amIright?