Question For Jo
 

Jo I have another one or your boats:drink:. We used it last weekend and are probably done for the year. While running I have to run the tabs at a little over 3 to stop the porposing, that is at a cruising speed. I think it is over propped some because I am only able to turn around 4200-4300 rpm and I am guessing from what Neversatisfied said that at those rpm's I am doing between 70-75 ish. He was running beside us. I don't know what size props they are yet because I have not been able to get them off. Previous owner said he never took them off. Anyways, Jo any ideas on getting it to stop porposing so bad? I am planing on atleast a new back seat this winter, and a cover, maybe a whole new interior. It also needs some carb work.

Jo could you pm me a price on a fiberglass windscreen?

Ditto on the windscreen.

I would be interested in a new style factory windscreen / fairing also.

Hi Dale,

I am glad you purchased another Pantera 28' Twin. My Father sold your 28' back in 1986 as a hull and deck only with upholstery and hardware. He did not rig it. I was 15 years old at the time so I do not have much info. to offer you.

I would need to see pictures of your set up and props to give you better advice. Are the props spinning in or out ? Does it do it when the drives are tucked in all the way or when trimmed ? How much fuel was in the tank ?

When you deal with speedmaster drives and props the set up is quite different than Bravo 1 drives and 4 blade bravo 1 props on your other Pantera 28'. It seems to me that your RPM is down from where it needs to be.

Call Dave at MDG Performance in Maryland since I think he worked on that 28' of yours while stored at his Marina. Dave is a very experienced engine builder with many years of experience.

JO

Jo, it does it wether drives are in or out. The props are spinning out. The higher the rpm the less tab needed, and I understand that. The tank was full when we started. I was just wondering if there was something I could do to not have to use so much tab at lower rpms?

As far as rpm's being down, I think the props might be a little big. The motors were checked out and were fine with 150lbs on every cylinder.

bigboat - add more power!

Not even kidding. I think that combo needs a bit more power to run right. The hull is trying to work but doesnt have the umph to get there. In the meantime grab a real small set of props just to let the motor buzz up a bit easier. Should change the attitude of the boat a bunch. Just my .02.

My props are 15 3/8x 26. I would like to add some power evdentually.

Did you get yhem off?

Jo you have a price for a windscreen yet?

Another question Jo, can you tell me what size the fuel tank in the floor was in 1988, also what size was the bow tank in my boat?


No, haven't got them off yet.

Back then the standard fuel tanks on the 28' were 120 gallons. My father does not recall installing a bow tank in that 28 of yours but he told me that "it has only been 24 years".Where is the forward tank located ? On race boats we would install an additional 60 gallons up in the front.

JO

I think your going to need more diameter in those props like 16.25 or 16.5.Try to spin them in it might give you a little more bow lift and stop the porpose.

Jo the tank is up in the bow under what is now the v berth, there are two fills on the deck. That tank has been unhooked.

Jo do you think turning the props in would help?

Excalibur, what has to be done on III's to change the prop direction? I can only turn around 4200rpm's now, wouldn't bigger props spin even slower?

What do you have for power and drives?
Dale

Jo you happen to get a chance to figure out a price on a fiberglass windscreen?

Hey Dale,

If you ever need a hand wrenching let me know. I'd be happy to help you out with your new boat! Send me a pm or an email...

[email protected]

-Artie

Artie, thanks for the offer, just might do that. I am just learning on all this stuff now. Where in Granville do you live? We are just down the street from Bakers Acres.
Dale
[email protected]

If you want to spin them in you have to switch the drives and they weigh alot . if your only turning 4200 a bigger diameter is going to give you even less rpm.Something dose not make sense if your running 73 at 4200 you must have a 1.36 gear in the drive or your tachs are off. If your tachs are right your going to need like a 22x 16.5.Those motors should spin at least 5000rpm.

How much is alot? Is there any way to find out what gears are in them?

Mark the crank pully and mark the prop shaft. Rotate the engine until the prop shaft turn one full revolution. I would expect it to be 1.5 or 1.33 revolutions.

They weigh about 150-200 lbs each and take 2,5 gallons of gear oil. You also need a special tool to put the drive back on. I used a fork lift and don't laugh but my special tool was duct tape. It worked fine.You can buy shaft adaptors from some place in florida. That will let you use 25 spline props and there are alot more of them available.

I ran that boat several times when it had some 509 making 600hp or so would run in the low 80s the boat did have some porpoise but not that bad,the owner was playing with some lead shot that was placed in the bow to help with the balance of the boat,I would try adding some weight in the bow and installing less pitch props with the weight of the 3 drives you are probably going to have to drag some tab to control the porpoise to go faster you are going to have to run some more power the owner of the boat when it was at my marina was building some 900hp but he passed away before he had a chance to get them in the boat

Ex what is the special tool for? I have removed bravos before(once) are these any different?

MG, I am having to use tabs to stop the porpose, right around 3.5 on the gauge. Did you rig it with these drives for the first owner? Do you have any idea how much weight you guys were trying in the bow?

Mg, do you know if the props that are on it now, 4 blades 15 3/8X 26 are the same ones that were on it with 600hp and low 80's?

Not knowing how your boat is set up, what does 3.5 on your indicators equate to in terms of deployment? Is it above, equal too, or below nuetral?

It is below. Zero on the gauge is paralell with the bottom approx. 1/2 in up from hull bottom.