Roostertail ?

[26aftcab454]

Re: Roostertail ?

.

The cavitation plate appears to be approx 0.5 inch below bottom of boat. That would do it I guess ?

BINGO!

check the mfg specs and see what they say.
My mfg job has nothing to do with boats but my job is to polish turds into diamonds when our plant screws up-it happens.

 

[Andy in NY]

Re: Roostertail ?

how old is the boat? is there a chance that there is a leak or was a leak and the floatation foam is all waterlogged? that can add several hundred lbs to the boat, and make it sit lower in the water than it should.

 

[Floatsum]

Re: Roostertail ?

Looks to me like it's coming off the hydraulic rams for the outdrive.

Normally I see them completely out of the water when running like that.

Much of the reason for the cavitation plate is to direct water / spray downward. Yours are underwater.

Really don't know if there is much you can do about it,,, realisticly without spending a small fortune.

Possibly a cure would be a swim platform across to whole stern?
May at least keep the spray out of the boat.

 

[Numlaar]

Re: Roostertail ?

Looks to me like it's coming off the hydraulic rams for the outdrive.

Normally I see them completely out of the water when running like that.

Much of the reason for the cavitation plate is to direct water / spray downward. Yours are underwater.

Really don't know if there is much you can do about it,,, realisticly without spending a small fortune.

Possibly a cure would be a swim platform across to whole stern?
May at least keep the spray out of the boat.

+1
I have to agree... it looks like your entire outdrive is submerged.... with nothing to control the spray downward... if the boat is under warranty (looks fairly new), I would take it to the dealer and complain up a storm to see if you can get it fixed... if not... the swim platform may not be a bad idea...

 

[MikDee]

Re: Roostertail ?

IMO, the drive seems to be too submerged at planing speed, and yet you say the cavitation plate is only 1/2" below the bottom?
A picture of that may help, because if your drive is mounted too low, I'd be all over them myself to fix it!

 

[Deepblue22]

Re: Roostertail ?

Here is a picture with the level on there. It comes in right at the bottom.

I would like to see a picture of a different Striper if anyone has one.

Added another short video to the photobucket link of it running with no trim tabs on the boat. The video we are in a constant turn. This was useful for filming because the majority of spray went to the starboard and so was able to more clearly observe the hydraulic trim piston right in the line of water.

 

[MikDee]

Re: Roostertail ?

I see what your problem is! But, I don't have a fix for it, it is there by Volvo design. The drive mounting height is just fine, but, the upper plate (What is that for? ) just above the cavitation plate is causing the rooster tail because it is actually slightly submerged at the tips on plane, the water flowing behind the boat rises approx. 1" per linear foot hitting the edges of that upper plate causing drag, & the roosters, I would imagine it might get even worse when trimmed up, or in a turn, good luck with this one

This is most noticable from the picture of the transom (back view)

 

[dkorzun21]

Re: Roostertail ?

what about if he added a hydro stabilizer wouldnt that keep the water down

 

[solar7647]

Re: Roostertail ?

I have seen this before on a friends boat. It was a prop issue. I read the thread that you linked about your prop, and I think you need a prop change. You are moving a lot of weight with a lot of power for three blade alluminum prop. I think you are just getting way to much air in the prop. I would go up to a 4 blade prop witch will increase the bite of the prop and come down to a 17 inch pitch. The increase in bite a lone will get rid of some air, alos I think you should go to a SS prop it wont flex as I am sure the aliminum one is.

 

[1rawdawg007]

Re: Roostertail ?

Find a used swim deck and slap it on ! Done.

 

[QC]

Re: Roostertail ?

Looks like all of the above to me, tabs + transducer + slightly low X dimension (AV Plate height) . . .

The AV plate being low is pretty common as it is more conservative to be slightly low than slightly high. When you say you are going to remove the tabs, you mean sliding the plate out of the hinge right? That will confirm whether it's the tabs or not for sure. Simply running with them up will not completely take them out of the equation . . .

 

[Deepblue22]

Re: Roostertail ?

On the striper owners club forum I got the potential solution to order a "splash shielding anode". Volvo part 3857857. (Thanks BT53). Anyone on here had experience with this product?

https://www.marinepartseurope.com/en/volvo-penta-explodedview-7797470-JHCAT-0,,,0005 .aspx

 

[Deepblue22]

Re: Roostertail ?

Here is a picture of the splash shielding anode, roostertail problem solved !

 

[QC]

Re: Roostertail ?

problem solved !

Thanks for the follow-up!!!

 

[jhs5150]

Re: Roostertail ?

This looks like an extension of the cavitation plate. Is that all there is to it?
I am having a similar problem with a 1987 Bayliner/Force 125.

Thanks,

 

[Deepblue22]

Re: Roostertail ?

JHS,

The part effectively increases the length of the cavitation plate. This is for an inboard application and it is a precicely engineered part. If you are dealing with an outboard and the problem is that it is mounted too deep, then the easiest and safest solution may be to raise the OB up one or two holes on the mounting bracket. You should start a new thread with your details and post a photo and someone will help you.

 

[dingbat]

Re: Roostertail ?

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