Boat wont plain out please help
 

Ok I am posting this up for my brother.

The boat is an 01 donzi 33 zx with 496's

He just got the boat this summer went and water tested it and the boat had no problems getting up on plain. He looked everything over and when he was there the props on the boat where brovo 1 28 four blades. Then he had the surveyed and during the water test there was no issues. He went a week or so later to pic it up and bring it home so a total of about 3 or 4 weeks between going there and and riding on the boat and then bring it back. We drop it in the water and the boat just stands up and spins not wanting to get on plain. I looks at the props aND noticed that the blades where really thined down. I am wondering if they switched the props out befor he piced it up and kept the good ones. Could over worked props that where not done for this boat cause this.

Thanks

Yes. Incorrect props will cause it. If it was 28 bravos then look and see what's on it now. If it's the same then something is going on.

They where and still are 28s. I have the 500efi's and are also turning 28s. I was able to get his up on plain but tool a lot of work. Feels like the props are just cavitating and spinning and not biting

Have you confirmed by eye, ignoring the indicators for a test, that drives are fully tucked and tabs are all the way down?

Yes we checked that the drives where in and tabs down. Tried with tabs up too.

Probably a stupid question, but was your bilge full of water, or was there an excessive amount of weight in the stern?

The bilge wasn't completely dry but not more then normal.

Did you try moving the beer cooler to the bow?

I am wondering if the props that they may have thrown on their where for a lighter boat with more horsepower or a straight bottom. We are going to switch my props for his to see if it makes a difference but that's in the spring. He is doing the normal plugs, wires and the normal every thing else like filters and fluids. But was talking about pulling injectors to have them cleaned and rebuilt. I just don't know if he sould do that over the winter befor trying something as simple as trying my 28s. That is free lol but this is just going to drive me crazy and it's not even my boat...lol

Just seams odd to go from running strong to not at all lie that. Props seam like a quick thing for them to swap out to keep or sell that could throw it off that fast. I'm not for shure if it could that's why I'm asking. Not saying they did for shure but it could be possible

Don't forget to run a Rinda scan tool to make sure engines are at 100% power. Fresh fuel, plugs, all filters are always a good idea. Switching props is easy enough also.

Thats elfin funny!!!

Take his props and compare them to your props and make sure that someone hasn't taken all the cup out of the trailing edge of the prop and the blades haven't been cut down.

That would be to ez after all it is a boat lol moving the beer that is...

We haven't put them side by side yet but I kow for shure they have been tuched the leading edge is super thin. They have some nicks but none that I would think make that big of a deal on its own.

Props are sofa king finickey at times. does it help get on plain quicker by a sweeping left or right turn? Tab settings?

My BT hates any tab at all getting on plane, adds to the time to level off.

As mentioned, look at the props close, my bblades props "tuned" for my stepped hull whale carry the nose way high when planing and breaks over hard. My preferred labbed no cup 28s offer little bow rise at all but slide on plane quickly. Same bravo 4 blade, 2 vastly different handling, planing etc

Good luck

Drive showers on it? Make sure placement is correct. Might have put another set of props on that are different enough to cause an issue. Showers can cavitate prop bad and do exactly what you say its doing if wrong.

No drive showers as of yet.

Ron, Lake isn't frozen yet, get out there. Put your props on and try. Measure the diameter and compare to yours. Also, why don't you just call and ask the previous owner, see if he switched them out?

I've got two buddies with 33ZXs and 496HOs.
I'll check with them and find out what their normal props are.

Just heard back from one of them: 26P Bravo1 4-blades.
It sounds like regardless of what was stamped on the original props (could have been 28s turned down to 26 or so).

...that you need to get a set of known 26P Bravo1 4-blades.

Those props may have been a set that goes with the boat when they wanted to pull a top speed run, and work when the boat has a light load, fuel, passengers, gear, etc. etc. There is a technique the race boat folks use with tall top end props, which involves letting the boat start to pitch the nose up, and waiting until it starts to blow out...
...then yank the throttles back, and let the wake push the boat up on plane; while you throttle up through the wall of water hitting the back of the boat. It's not something you want to do everyday/every time; and it's tricky to master.

I have an 03' 33ZX with 496HOs. The boat came with 26s, but I don't know if they were ever "touched". They had some initials stamped on them, so I think they were. Never had a problem getting on plane, but cruise speed sucked - 3500rpm maybe 42mph. I bought new 28s from Merc (unlabbed). Boat gets on plane the same, cruise up by 10mph (low 50s at 3500), and I only lost about 1-2 mph top end (little over 70, depending on day and fuel). Hope this helps...

Donnie sead he was going to give them a call but in my eyes I don't think they will say ya I took the good props off and put some garbage ones on....lol just my thought process

Cool thanks

See the info "Cignificant" posted above. He is one of the two I mentioned. The other one runs 26s.

Ron, shouldn't he be running 26s with the smaller motors, compared to yours with the 500s? I guess it should still plane with the 28s..... Just switch your props, then you know what you have.

Yup. Chances are you are correct.

Yes I seen that. So it came with 26s and can run with stock 28s so if in deed the 28s that he has have been labed for a particular situation / boat that could definitely throw things way out of whack. Thanks for all the help.

That's the plan for now and would try it now if it wasn't winterized and tucked away in the back of a building next to mine. Spring can't get here soon enough. I just want to get all of the kinks worked out for him so he can be happy about his new boat. He had all new bellows gimbal bearings and pins done. So hopefully he will be good to go

Sounds like it wouldn't be a bad investment for you to both go in on a set of 26P B1 props. They may turn out to be ideal on his boat, or the perfect set of backup/spares for both of you if you guys boat together; especially if you make long runs together. There was a smokin' deal on a set of 26s here a week or so ago, sold immediately. Keep your eyes peeled, as this would not be money wasted.

To all people responding to this fella's questions. You people are awesome. Not one person breaking this guys balls. Very helpful . Way to go OSO peeps.

Ok we had the two sets together and took some pics. His are definitely labed. There is a few different stamps on the props.

First pic is of the sape of his blade[IMG]http://i1149.photobucket.com/albums/...psx3kx2qwm.jpg[/IMG]

Now this is side by side mine is on the right[IMG]http://i1149.photobucket.com/albums/...ps8t85omv0.jpghttp://i1149.photobucket.com/albums/...pspprqt3in.jpg[/IMG]

Now here is the stamps on the props in the hubs[IMG]http://i1149.photobucket.com/albums/...ps3w1iwb2t.jpghttp://i1149.photobucket.com/albums/...psg07tz76y.jpg[/IMG]

And the ones on the out side one props all different and one has 2 on it.[IMG]http://i1149.photobucket.com/albums/...psdvadahyg.jpghttp://i1149.photobucket.com/albums/...psabvs5bjq.jpg[/IMG]

Where is Brett? He can decipher that if anyone can!

Looks like a little less blade area, did you check the diameter to see if they were cut down? As someone mentioned before, see if you can hold a small straight edge across the "rake" of the blade to see if cupping was removed at the trailing edge (Sywayz maybe mentioned that?) They look thinned and worked over, Don's have a slight "tip" where yours are round (Stock). I have a set of 24s that look like that.

We didn't have a tone of time to spend today and really not the right tools. He had to get to some stuff befor going to sleep for work tonight. This time of year for a ups driver is killer. So we where just looking for the obvious things like shape blade tip cup and markings. They where thined down that's for shure and apier to be cut down the hubs are the same but his blades seam shorter and have no tip cup like mine.

I hate to ask a stupid question, but is the bottom clean? Had a friend that lets his Fountain sit in the water and he could never get it to plain because the bottom was so dirty with algae.

I did call bblades and talked to someone that told be they are not there markings and most likely a factory lab. But don't know why none of the stampings are the same.