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Ckaz21

  • Karma: +1/-0
Submarine on deceleration
« on: August 24, 2014, 06:41:52 PM »
18ft tahiti. I believe I am hitting the low 70s at top speed. I notice that even on a mid deceleration after top speed pass the front of my boat starts getting lower and lower...kind of freaky. Is it possible for the damn thing to actually go under water? How do I prevent it? Thanks


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svssr95

  • Karma: +6/-1
Re: Submarine on deceleration
« Reply #1 on: August 24, 2014, 07:35:23 PM »
Don't go 70.......


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  • Boat #1: 76 Hallet
  • Boat #2: 09 25 Ft Party Barge
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i just want someone to look at my junk too tell me if it is cj worthy!

Ckaz21

  • Karma: +1/-0
Re: Submarine on deceleration
« Reply #2 on: August 24, 2014, 07:47:54 PM »
Thanks but thats not an option


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svssr95

  • Karma: +6/-1
Re: Submarine on deceleration
« Reply #3 on: August 24, 2014, 08:04:12 PM »
Technically it is, just not the one u r looking for, luckily others more voiced on this will probably chime in, GT where r u ???


Sent from my over priced thinga majig, from my garage while drinking beer and watching baseball.
  • Boat #1: 76 Hallet
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i just want someone to look at my junk too tell me if it is cj worthy!

GT Jets

  • Karma: +192/-0
Re: Submarine on deceleration
« Reply #4 on: August 24, 2014, 08:12:01 PM »
Technically it is, just not the one u r looking for, luckily others more voiced on this will probably chime in, GT where r u ???


Sent from my over priced thinga majig, from my garage while drinking beer and watching baseball.


Why me? I go 90... :screwy:

 ^-^

How deep is your loader/shoe?

GT
  • Boat #1: 1992 Carrera 20.5 Elite (I/O bitches)
  • Boat #2: 19' Bubble deck Jet BBC Berkeley
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If i get some free time tonight at work, ill play with it and post it for everyone to see.

Time to man up and yank it John!  :banghead:
Ray

Ckaz21

  • Karma: +1/-0
Re: Submarine on deceleration
« Reply #5 on: August 24, 2014, 08:12:39 PM »
Lol true


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Ckaz21

  • Karma: +1/-0
Re: Submarine on deceleration
« Reply #6 on: August 24, 2014, 08:13:55 PM »
I dont have a loader. Just the rock grate, my boat is heavy as hell though. I'll toss some pics up of the bottom if it helps


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GT Jets

  • Karma: +192/-0
Re: Submarine on deceleration
« Reply #7 on: August 24, 2014, 08:15:43 PM »
Have you actually been able to "dip the bow"?

I'm thinking paranoia is in the passenger seat.  :sly:



GT
  • Boat #1: 1992 Carrera 20.5 Elite (I/O bitches)
  • Boat #2: 19' Bubble deck Jet BBC Berkeley
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If i get some free time tonight at work, ill play with it and post it for everyone to see.

Time to man up and yank it John!  :banghead:
Ray

Ckaz21

  • Karma: +1/-0
Re: Submarine on deceleration
« Reply #8 on: August 24, 2014, 08:18:30 PM »
Here's some pics


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TrollerDave

  • Karma: +32/-0
Re: Submarine on deceleration
« Reply #9 on: August 24, 2014, 08:29:39 PM »
That broken fin on the intake looks fresh.

Has the boat done the "submarining" before? Or has it just started?
Is that rock grate loose at all? Does it have a bow tank (gas)?
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GT Jets

  • Karma: +192/-0
Re: Submarine on deceleration
« Reply #10 on: August 24, 2014, 08:34:59 PM »
Is that a GT hull?

It is the same bottom as mine, and they do really weird shit on a hard shutdown, submarining is not one of them. Look for a squishy area in the bottom of the hull just in front of the engine, you may need to stiffen things up a bit.

When I shut mine down hard for the first time from about 80mph, it pulled really hard to the left and took a little water over the right rear, but the bow never got wet. My shorts however were a little on the moist side... A drip or two of pee did escape...  :thumbdown:

GT
  • Boat #1: 1992 Carrera 20.5 Elite (I/O bitches)
  • Boat #2: 19' Bubble deck Jet BBC Berkeley
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If i get some free time tonight at work, ill play with it and post it for everyone to see.

Time to man up and yank it John!  :banghead:
Ray

Ckaz21

  • Karma: +1/-0
Re: Submarine on deceleration
« Reply #11 on: August 24, 2014, 08:41:41 PM »
The bow never has gotten wet from it but the bow lows its its only maybe a foot out of the water. Its probably more like 8 inches. Kinda scary cause it stays like that until you give it enough power to take it out of deceleration.

Not sure what the hull is all I know is that its a tahiti. Hardin marine made them also and I guess so did caribbean. So im thinking its a popular mold.

Nothing under it is squishy. The chip in the intake was like that when I got ot.


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Ckaz21

  • Karma: +1/-0
Re: Submarine on deceleration
« Reply #12 on: August 24, 2014, 08:42:48 PM »
Sorry for the typo's, need to start proofreading haha


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Ckaz21

  • Karma: +1/-0
Re: Submarine on deceleration
« Reply #13 on: August 24, 2014, 08:43:57 PM »
Also I only noticed it happening after I held it wide open for about 12 seconds


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  • Karma: +192/-0
Re: Submarine on deceleration
« Reply #14 on: August 24, 2014, 08:44:06 PM »
The bow never has gotten wet from it but the bow lows its its only maybe a foot out of the water. Its probably more like 8 inches. Kinda scary cause it stays like that until you give it enough power to take it out of deceleration.

Not sure what the hull is all I know is that its a tahiti. Hardin marine made them also and I guess so did caribbean. So im thinking its a popular mold.

Nothing under it is squishy. The chip in the intake was like that when I got ot.


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IMHO, you should consider either replacing, repairing or cleaning up that intake. How much crap do you have in the bow?

GT
  • Boat #1: 1992 Carrera 20.5 Elite (I/O bitches)
  • Boat #2: 19' Bubble deck Jet BBC Berkeley
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If i get some free time tonight at work, ill play with it and post it for everyone to see.

Time to man up and yank it John!  :banghead:
Ray

Ckaz21

  • Karma: +1/-0
Re: Submarine on deceleration
« Reply #15 on: August 24, 2014, 08:49:51 PM »
Only life jackets a sub and amp and a couple oars. I have dual tanks so no bow tank


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  • Karma: +192/-0
Re: Submarine on deceleration
« Reply #16 on: August 24, 2014, 08:50:46 PM »
Only life jackets a sub and amp and a couple oars. I have dual tanks so no bow tank


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The worthless stereo shit is you problem.....

GT
  • Boat #1: 1992 Carrera 20.5 Elite (I/O bitches)
  • Boat #2: 19' Bubble deck Jet BBC Berkeley
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If i get some free time tonight at work, ill play with it and post it for everyone to see.

Time to man up and yank it John!  :banghead:
Ray

Ckaz21

  • Karma: +1/-0
Re: Submarine on deceleration
« Reply #17 on: August 24, 2014, 08:53:21 PM »
Hahaha. I agree but it only weighs maybe 40lbs


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  • Karma: +192/-0
Re: Submarine on deceleration
« Reply #18 on: August 24, 2014, 09:03:49 PM »
Just curious, how forward are your tanks?

GT
  • Boat #1: 1992 Carrera 20.5 Elite (I/O bitches)
  • Boat #2: 19' Bubble deck Jet BBC Berkeley
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If i get some free time tonight at work, ill play with it and post it for everyone to see.

Time to man up and yank it John!  :banghead:
Ray

Ckaz21

  • Karma: +1/-0
Re: Submarine on deceleration
« Reply #19 on: August 24, 2014, 09:09:07 PM »
They're 15 gals each and run from the middle of front seats to the back of the boat


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Ckaz21

  • Karma: +1/-0
Re: Submarine on deceleration
« Reply #20 on: August 24, 2014, 09:10:02 PM »
I never fill them though. Only fill the right tank with 10 gals every time I go out


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  • Karma: +192/-0
Re: Submarine on deceleration
« Reply #21 on: August 24, 2014, 09:14:55 PM »
Does your boat have a floor?

GT
  • Boat #1: 1992 Carrera 20.5 Elite (I/O bitches)
  • Boat #2: 19' Bubble deck Jet BBC Berkeley
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If i get some free time tonight at work, ill play with it and post it for everyone to see.

Time to man up and yank it John!  :banghead:
Ray

Handi-Crack

  • Karma: +3/-0
Re: Submarine on deceleration
« Reply #22 on: August 24, 2014, 09:21:29 PM »
It's the tanks, the front seats are past center point of the boat. So on deceleration all the fule rushes forward causing the bow to dip. It's kind I like a see-saw the slower you go up on one side the slower you go down. So under deceleration at high speed the gas rushes forward causing more g forces towards the bow.

At least that how id look at it


  • Boat #1: 75 wriedt mavrick
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Ckaz21

  • Karma: +1/-0
Re: Submarine on deceleration
« Reply #23 on: August 24, 2014, 09:24:09 PM »
Good point handi-crank. GT it has a floor between the stringers its bolted in with L brackets though. I got in a hurry...


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Handi-Crack

  • Karma: +3/-0
Re: Submarine on deceleration
« Reply #24 on: August 24, 2014, 09:26:28 PM »
Same applies if you have a floor like GT said. If it hasn't been drained you could have water doing the same as my fuel theory.

Or I'm an idiot, maybe both


  • Boat #1: 75 wriedt mavrick
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