How I set my ski on fire and then sunk it.

Location
Canada
I thought I'd share the tale of how I set my Superjet on fire and then sunk it.
This happened last summer. I have been working on fixing up my old '91 SN Superjet, fixing issues as they come along. The list is long and comprehensive, and up to now, almost everything has been replaced or fixed.
Last summer I was having intermittent starting issues. You'd press the start button and it would either turn over great or it wouldn't at all. Press it enough times and it would fire. I rebuilt the start/stop switch, replaced the connector that was worn out, replaced the starting solenoid, replaced the starter, tested the ground wire, and the issue remained. It would always bench-test fine but when it was back in the ski the issue would come back.
I figured it was a bad ground between the ebox and the engine. I decided to add an additional ground line going from the ebox directly to the battery. A few tests on the trailer and it started better than ever, WIN!
I went out to the lake and was having some fun and falling into the water. No matter, it started back up with ease... until it didn't. This final fall was the beginning of the next few minutes where I genuinely didn't know if I was going to lose my ski, drown, or both.
So what happened? I fell in, swam back to my ski as I've done 1000 times before, press the start button and click. Nothing. I tried a few more times and it turns over but feels like the battery is dying, aka, very slowly. Foolishly, I held the start button hoping that the starter would kick into high gear like it's done before or that maybe it would catch enough to fire the engine. This didn't work and the next thing I knew there was smoke pouring out of the engine compartment. NOT GOOD.
In my panic, I decided let's get the hood open and see if there is anything I can do to make this better. I managed to get the handle pole propped up, the hood latch released, and proceeded to fill the engine compartment with water and sink the ski... at least the fire was out.
Now, the boat is underwater, the hood is floating away, and my life jacket is working, though not very well. I'm panicking trying to keep my head above water and stay with the ski. I manage to collect everything and start swimming to shore, very slowly, dragging the sky behind me. It's exhausting.
I remembered, I have a whistle on my life jacket. Okay, let's use it. I start blowing on it as loud as I can. It's hurting my ears but nobody else seems to notice or care. Keep going. Keep going. What felt like 30 minutes later, I see somebody on shore looking out at the lake to see if they can find the source of the whistling, finally, they see me. I'll be okay. I see them running around going in and out of the house, presumably looking for the boat keys or somebody who knows how to operate the boat. I don't know. They finally decided to go to the neighbor's house and he gets in his boat and comes to save me. Thank you so much!
I finally get back to shore and get the ski on the trailer not knowing what to do next. Exhausted, I start reading the thread So you sunk your ski looking for what to do next. After a couple of hours working on it, I wasn't going to get it running again, so I did the last resort, filled the engine with diesel, and resolved myself to fix it later.
So, what did I learn from this?
- Always have a whistle on your lifejacket. I have one on every one of my jackets and one on the lanyard.
- If your lifejacket is iffy, get a new one. I had a tough time finding a red one, it seems like they're all black. If I was wearing a black one, I don't know if I would have been seen or not.
- NEVER add an additional ground between the ebox and the battery. What happened is the ground wire between the battery and the starter was broken and making intermittent contact. I couldn't see this because it was in a plastic loom with no signs of wear. It also passed every test with a multimeter. What happened was when I added the second ground, all of the power the starter uses back fed through the ebox and went through the wire I added. The smoke was this wire melting from end to end. Thankfully, it was a lighter gauge than what is from the ebox to the engine, otherwise, this would have been the melted wire.
So, if you are having electrical issues, I highly suggest fixing them properly. Never add additional wires in places they weren't meant to be. It just might be the last thing you do. I genuinely thought that was the end for me. Do it right the first time and it will last you for a long time.
I hope this can help some people ensure they have proper safety equipment and to not sink their ski.
 
Location
Wisconsin
Do you have foam in your ski? I've had a cooling line pop off before causing the whole thing to go under in my heavy waterlogged squarenose. Despite the weight, the stock foam still floated the rear end fine. Got to the shoreline with pretty much zero struggling to fix and fire up and keep riding like nothing happened. If you were having issues keeping it from totally sinking, you're missing foam somewhere I would say.
 
Location
Canada
The foam is there and it did float enough to not disappear completely. There were only a few inches of the rear end still above water, but it did keep itself from totally sinking.
 

WFO Speedracer

A lifetime ban is like a lifetime warranty !
Location
Alabama
There is nothing wrong with adding another ground wire, what you encountered was a short to ground and it would have taken out the ground wire regardless of where it was located at, if it just had the stock ground wire on the stator it would have melted that wire and all the other stator wires around it all the way back to the stator .
 
Location
Canada
Well you almost made it into the Carnage Forum Section :p
Indeed. Glad to stay out of there!
Can order some new Custom Battery Cables here
Thanks, I'll check them out.
There is nothing wrong with adding another ground wire, what you encountered was a short to ground and it would have taken out the ground wire regardless of where it was located at, if it just had the stock ground wire on the stator it would have melted that wire and all the other stator wires around it all the way back to the stator .
I wholeheartedly disagree. If there had been no ground between the ebox and the battery, the starter would have simply done nothing. It would not have fed through the stock ground wire as the ebox is not connected to the battery, meaning there is no path for the electricity to follow.
On the ground side of things, the stock design is BATTERY <> BLOCK / STARTER <> EBOX. Electricity MUST flow to its neighbor, it can't jump. By adding the wire, I enabled it to jump in a path that was unexpected and unsafe.
If you are going to add a second ground wire, it must connect in a way that's parallel to the stock design to be safe. Either EBOX <> BLOCK or BLOCK <> BATTERY.
After what happened, I will never use a second ground wire and I will strongly suggest others don't either. Fix the real issue and you'll be fine. Create a circle and you're setting yourself up for trouble.
Was your life vest not a USCG apporved one?
Yes, but I'm sure it was close to 20 years old and had seen better days. It's in the garbage now.
 

WFO Speedracer

A lifetime ban is like a lifetime warranty !
Location
Alabama
I will agree that you should not have gone directly from the battery to the ebox, Kawasaki on pretty much every 400-440 and 550 ever made had a small ground wire that went from the ebox to an intake bolt. Yes if the negative ground cable is toast it will try and ground somewhere else .
 

Quinc

Buy a Superjet
Location
California
Just went through a fubar ground wire also. That large ground wire will get hot enough to melt and burn your hand. Also your ebox is grounded by the black wire going to your stator.
 

DylanS

Gorilla Smasher
Location
Lebanon Pa
The captain almost went down with his ship props to you for holding onto that sucker I’ve had a buddy do the same thing with a x2 wearing a brand new jacket and the only thing I could see was his chrome dome!
 
Location
Canada
Any pics after the fire?
The only thing I could find is a picture of the battery cable.
The other pictures I have are the hole in the hull, broken coupler, broken throttle cable, broken fibreglass on the nose, split pump, broken pump shoe, and broken pistons...
I do have a few other pictures of things that aren't broken, but it seems like I tend to only take pictures when something breaks.

Every one of those, except for the hole, happened last summer.
 

Attachments

  • 20220803_083702.jpg
    20220803_083702.jpg
    42.6 KB · Views: 33
  • 20210906_131624.jpg
    20210906_131624.jpg
    114.1 KB · Views: 35
  • 20210913_133022.jpg
    20210913_133022.jpg
    68.6 KB · Views: 34
  • 20220416_115902.jpg
    20220416_115902.jpg
    108.2 KB · Views: 32
  • 20220424_113428.jpg
    20220424_113428.jpg
    171.9 KB · Views: 30
  • 20220620_170538.jpg
    20220620_170538.jpg
    125.4 KB · Views: 32
  • 20220620_170541.jpg
    20220620_170541.jpg
    128 KB · Views: 32
  • 20220821_193704.jpg
    20220821_193704.jpg
    103.7 KB · Views: 31
  • 20220821_195915.jpg
    20220821_195915.jpg
    155.8 KB · Views: 32
Location
Wisconsin
The only thing I could find is a picture of the battery cable.
The other pictures I have are the hole in the hull, broken coupler, broken throttle cable, broken fibreglass on the nose, split pump, broken pump shoe, and broken pistons...
I do have a few other pictures of things that aren't broken, but it seems like I tend to only take pictures when something breaks.

Every one of those, except for the hole, happened last summer.
Holy..... now that is the definition of an abused superjet.
 
Location
Canada
Holy..... now that is the definition of an abused superjet.
Don't I know it! Before it was mine, it was my uncles and he left it sitting full of salt water for about 3 years. He had a 750SX and the Superjet both engine compartments were filled with water. My dad and brother picked them up, cleaned them out, and miraculously they both started and ran. My dad still has the 750SX and it runs pretty good. When they discovered the hole in the hull (which had been previously patched with the wrong fiberglass) and tried fixing it again which also failed, I seized my opportunity to grab it. And I've been fixing it up as things break.
Everything pictured has been fixed. I'm currently rebuilding the engine thanks to @JetManiac
Hopefully, after the engine rebuild, nothing else breaks and I can work on things I want to do, rather than things I have to do.
 
Top Bottom