Need to understand Weismann WMD vs merc #6
 

I really want to understand what is the real difference between these two surface drives. Debating on which drive on a single engine 28ft cat. The wmd is about 200lbs lighter and the transmission can go in the ext box and its rated to 1600lbs torque and the merc #6 is rated at 1000lbs even tho we know it can take a lot more and WMD is a true dry sump probaly taking less hp to turn. Why would someone chose the #6 over the WMD? It seems like a no brainer. You don't have to move the motor fwd for trans and its supposedly much stronger for everyday abuse. I can't find exact pricing on either on the net but heard they about the same. The wmd is lighter,stronger and banned from some of the offshore racing because its faster. What am I missing, please chime in!

24hrs and no replies? I'm surprised!!! I'm not trying to sell or convince anyone just want some of y'all's professional and experience opinions. Thx y'all

I have no experience with them, however, I think they look and the specs sound great. I just do not think there are that many out there. Kind of like the sage 8 drive, looked really promising, but so few out there.

I know that every race boat they ever put their drives and transmissions on won and was soon after banned from competition because their stuff was so much better than Mercury's. I have no idea of pricing but would not hesitate to put their stuff on my boat.

Yeah, those sage 8's really looked interesting, though i have never actually seen them on a boat to know how big they actually are..

I think I have seen a pic of them on a 46 skater. It is floating somewhere around the internet.

If I ever have a new boat built it will for sure have the Weismann drives on it...... Been looking at those drives for years, they are BAD ASS......

What about the Xpower drive? no transmission needed and very light.

For that kind of money you can buy a few arnesons

Merc has down shafts internally.

Weismann does NOT run down shafts
Everything runs in line... No weak points.

Mercury bands everything Weismann makes
Because it works better.

Weismann was the first to drysump and were
Banned. Shared there design with Mercury and
Mercury changed it to a partial dry sump.

Dave Wesseldyke has them on Jaws
Not sure of his thoughts.

Jim Dyke used them in there race program
Said you had to drain the water from the case
Constantly to keep bearings healthy.

Gentry was the first to dry sump a merc drive, the #5 back then. Then the victory team just ran the #6 with little to no oil. Regardless dry sump concept has been around for a century

The vertical shaft has some advantages in your comparison also. Not saying it's not good but just saying don't believe the brochure 100% as there is a reality beyond the hype. The parasitic drag is minimal in comparison to the hydrodynamic drag. The Weismann looks more like a kaama

How can they Ban a Certain design of drive in a Open Class?

Look here for "shifter" on the board here that's pat weismann if ik correct he should have answers and info that you need

The rules are for the most part merc out drive only and believe me merc loves this more than anything as it gives and projects the feeling of superiority in the market. Why is this this way you ask, because the racers themselves are so ignorant and fearful that they approved it. When the Aussie team kicked butt in kW the racers were quick to ban the boat and the setup as they were afraid to put it simply. No one wanted to build a new boat they said to convert to a different setup so it Was easier to eliminate the issues than to face it. Resultant of this is that everyone thinks the merc is the only thing as that's what the racers use when in reality they believed that originally themselves but then realized they couldn't face their fears and made a rule change. Kinda like religion in the old days.

Merc had to because they couldn't reverse for any long periods without killing the lower gears... PUMP doesn't run backwards..

http://www.weismann.net/Products/wsd.html ..... good info

they do now.had 1 apart,there's a slide action that goes on in the pump that lets it flow in either direction.And when rebuilding,the instructions make you test the pumping action in both directions.
Had one that only pumped in 1 direction,,was a burr from the blow up that we didn't catch the first go around.

So if a guy was going to re-rig a mid 700hp Bravo boat would you go WSM or Arneson?

Still flying that 36 bonanza??

Not as much as last year. Life is shifting again so I haven't had the time or reason to put holes in the sky. We are really close to building a house & getting moved back to Wichita, which means a new boat is very close to being a reality too!

You seriously have to ask that one?

I didn't type it in for typing practice. This isn't Mavis Beacon typing school. I asked a question & you gave a smartass, know it all response that wasn't helpful in any way other than to bust balls & make yourself feel smarter.

And Pat Weismann's Father, so I was told designed the Kaama Drive. . Hmmm . wonder how Merc. liked that drive

Sounds like one of your typical replies. :cool-smiley-011:

Truth be told Pat dry sumped the IV drive for Victory long before the VI. Drive looked crazy had hoses externally on the drive to pump the oil. And the reason Merc didn't do a full drysump is you have to modify the gimbal and run an internal oil tank.

The new Arneson will not need the external trans, might want to wait for it.

will give me time to sell off a few organs to raise the funds.:D

As we speak my boat is being converted from Dry sump sixes to Weismann WMD's. The upper gears in the sixes do not last behind the turbines. Usually failing somewhere between 10 and 40 hours. I will let you guys know how it goes.

Please let us know how your change works out!
I'm planning a large project in the future. I'm going to sell the htm ss24 in the future. It runs good now 102gps with 650 hp. But looking hard at the nordic 28ss and putting my new motor in it. 1350hp on 93 and about 1700hp on e85. I think the WMD is the only choice. I just hope it will work well on a single engine 28cat boat like the 26 eliminator Daytona I have seen on the net.

If the wife allows it

Check out the nordic 28 with the X Power drive on it. It has a teague 1000 in it and it goes over 130mph. Thane said it was the fastest 28 with that horsepower rating. We will warranty the X Power drive to 1600 hp and we also guarantee it goes faster then any other drive. Far lighter then all the drives mentioned above and a direct replacement for a bravo drive. Installed it only weighs 202 lbs wet. Its an actual dry sump drive. Their is basically zero oil in the drive except for what is sprayed in via the 3 stage dry sump pump that is integrated right on the drive. It also has a self contained dry sump tank under the carbon covers.

It's a fine looking drive for sure! I have not yet got the the point of pricing between x and WMD but would be curious, transom assembly and all. Does it need a transmission?

How often do y'all recommend rebuilding or opening up the drive to check it out with 1600hp? Going to pm you too FYI

Been running my Weismann WMD's all summer behind the turbines and I don't have one complaint.

Thanks for the update and really happy to hear your positive results! Please start a thread with pics please. Videos would be great also!

Put my Weismanns up for sale, ran great all year, just think that shaft drives would be the ultimate setup behind the turbines.

http://www.offshoreonly.com/forums/s...5k-pair-2.html

Lots of good info on here. Id like to see a cost comparison between weismann, arneson, and x power. And a performance comparison .

I want your weismans