Jet shaft through hull blowout

[bigwoo]

you have to post pictures of your repairs. I guess the fiberglass has to be repaired but not gel coated .

 

[Craig]

Best of luck with the repair. How much water did you take in afterwards?...and just out of curiosity what kind of rope is that? Wow

 

[MIDLIFECRISIS]

Here are more pics after I got all the rope out and the jet drive out.

 

[jetboater4life]

Best of luck with the repair. How much water did you take in afterwards?...and just out of curiosity what kind of rope is that? Wow

Looks like a dock line to me. Those things are pretty thick.

 

[MIDLIFECRISIS]

Yep doc line. Used to be 20ft now about 5ft.

 

[MIDLIFECRISIS]

@Craig Not sure gallon wise but it was alot. Bilge pump kept up with the water in the engine compatment but the lower hull holds a butt load of water. On one engine I coldnt get planed out 15 minute trip back to the boat ramp took 45 min. I am almost sure we left a trail of water from the lake to my driveway, 62 miles with hull plug pulled. Going to put a good size pump at the very bottom of the boat close to the through hull depth sounder.

 

[Volffas]

Yep doc line. Used to be 20ft now about 5ft.

Was it yours? Or just a rope floating in the water that you didn't see?

Either way, good luck with the fix.

 

[MIDLIFECRISIS]

@Volffas It was mine, we had the tube tied to the back of the boat with it. my kido un tied the tube and didnt put the rope in the boat, it was tied to the oh shit handle behind the driver. Wife cranked up the boat to push it up on the beach more, didnt realise rope was there and the rest is history. I want to make a alarm that goes off when you turn on the key and before cranking that yells ROPE ROPE ROPE.

 

[Volffas]

@Volffas It was mine, we had the tube tied to the back of the boat with it. my kido un tied the tube and didnt put the rope in the boat, it was tied to the oh shit handle behind the driver. Wife cranked up the boat to push it up on the beach more, didnt realise rope was there and the rest is history. I want to make a alarm that goes off when you turn on the key and before cranking that yells ROPE ROPE ROPE.

It can happen to anyone at anytime! We had a really close call this weekend. I think your alarm would be a great addition to my boat!

 

[Craig]

It can happen to anyone at anytime! We had a really close call this weekend. I think your alarm would be a great addition to my boat!

X2

 

[Ronnie]

I'd go with a professional repair job if it were my boat. That joint is the modern equivalent of a stuffing box it has to be water tight and perfectly aligned. Being in the intake area a lot of water will pass through there whenever the corresponding engine is on and the shaft will sometimes be spinning at. 7k+ rpm. As I mentioned in the other thread I'd bet insurance would cover most of the costs.

 

[MIDLIFECRISIS]

@Ronnie the through hull fitting that busted does not even touch the shaft, the rubber hose is what makes it all water tight. When I get my part in I'll share somemore pics.

 

[Glassman]

Holy Shitamaroo!

That hurts just looking at it. Thanks for the reminder, sorry for your troubles.

 

[Ronnie]

@Ronnie the through hull fitting that busted does not even touch the shaft, the rubber hose is what makes it all water tight. When I get my part in I'll share somemore pics.

I defer to your first hand experience, I thought there was a (main) bearing in there. All this time people thought the weak point was a plastic through hull scupper when in reality they should probably be more concerned with the reliability of a short rubber tube and the clamps used to hold it in place. At the same time that part rarely sees the light of day but the scupper is out in the open. Again, good luck getting it fixed hopefully before your season ends.

 

[MIDLIFECRISIS]

Ok update time @Ronnie here is the pic of the new through hull fitting. It has about a 3/16 of clearance all the way around it. So guys make sure you keep an eye on the hose clamps for the hose that seals the fitting to the mid bearing.

 

[Ronnie]

So the plastic part goes through the " nipple " in the hull and the rubber hose with a clamp on each end is what covers the part of the shaft between the main bearing in the engine compartment and intake area? Wow, before seeing and reading this I would have bet there was more to seal / stuffing box than that but it must be good, I can't recall anyone have any issues with this?

So how long do you think it will be before you fix it/ get back on the water?

 

[justason]

Good tip @MIDLIFECRISIS was yamaha smart enough to use a SS clamp here? Yours still look rather shiny in the original pic.......Perhaps I shoulr add this as a "upgrade" when I do the scupper.

 

[96Pirate]

This might be a stupid idea or maybe it has already been discussed...but has anyone ever thought about adding a screen over the intake grate? I assumed or always thought that is where the ropes are being sucked in. How much would that impact the water flow?

 

[Gumbeaux]

Had a close call this weekend. Asked the kids if they had the ropes secured..."yes"... Wife started the starboard engine to nudge us forward....
Engine quit almost immediately. I went to helm to investigate. It quit again immediately. Tried the port engine. Same thing.

Checked the ropes. Gave the kids my "this is not a cruise. you are the crew speech". Popped the plugs and found ropes around BOTH shafts.

Here is my question/comment. Why did the engines shut down on their own? Is there some sort of switch that does/could/should sense the extra resistance of something like a rope in there? Is that a feature or just a convenient disruption in the normal operation of the engine?

Anyway, I popped the plugs and pulled the ropes out with only a little effort and cussing and untangling. No need to get in the water, etc.

No other damage that I could see, hear or feel. We ran the boat all day after that with no trouble.


Good luck to the original poster on your repairs.

 

[Big Shasta]

Had a close call this weekend. Asked the kids if they had the ropes secured..."yes"... Wife started the starboard engine to nudge us forward....
Engine quit almost immediately. I went to helm to investigate. It quit again immediately. Tried the port engine. Same thing.

Checked the ropes. Gave the kids my "this is not a cruise. you are the crew speech". Popped the plugs and found ropes around BOTH shafts.

Here is my question/comment. Why did the engines shut down on their own? Is there some sort of switch that does/could/should sense the extra resistance of something like a rope in there? Is that a feature or just a convenient disruption in the normal operation of the engine?

Anyway, I popped the plugs and pulled the ropes out with only a little effort and cussing and untangling. No need to get in the water, etc.

No other damage that I could see, hear or feel. We ran the boat all day after that with no trouble.


Good luck to the original poster on your repairs.

The engines don't really make much horsepower (edit: I meant torque) at idle so the tension of the rope wrapped on the shaft caused them to stall. Like when you don't give it enough gas while you slip the clutch to get a standard transmission vehicle moving.