Outboard Top Speed World Record 200 mph Attempt

[MODVP22]

The Wright's Device that is laying on the table, that is the up draft style. Jon built for me in 1993, I had tears in my eyes when I found it. I did not know Jon bought it back from the guy I sold it to.

I'd be glad to come over and help organize. Hey us OHIO outboard people gotta stick together

[milkdud]

Simply awesome! That outrigger looks like it could enter orbit.

Conrad

[afr]

loookss sweet a hudge pile of goodies

hoss thats what i was told i am not try to argue with anyone just stating what i was told

[Hoss Marine Propellers]

hoss thats what i was told i am not try to argue with anyone just stating what i was told

Yes, I'm not trying to argue about anything either or start an argument ......
Anyone can post any comments or opinions when on-line & I want to be respectful of those comments or opinions.
I talk to a LOT of people and hear many stories/comments .......
Some things just don't make sense & that's why I was commenting about the prop rpm?

[STV_Keith]

Some things just don't make sense & that's why I was commenting about the prop rpm?

IIRC, OMC built a custom one-off speedmaster type case that was overdriven for the water speed record attempt boat. With this effort, the easiest thing to do would be to run a 1:1 SSMIV and put an overdrive trans in the midsection they build. The components they just got from Jon may include a 2-speed trans he did (I saw the pics before, so maybe they got them), but that could be reconfigured to be OD.

From my calcs, 9000rpm, 35% OD (1:0.74 OD box - that's a Lenco ratio), 5% slip with a 20p prop is 218mph.

[Spectre Powerboats]

Simply awesome! That outrigger looks like it could enter orbit.

Conrad

Unfortunately, we will be using this boat for testing only and have started building a new one for the record runs.

[Spectre Powerboats]

We did get the 2 speed.

[CptAJ]

I'm morbidly curious about what this hull can do on stock and/or conservatively modified motors. (Mostly cause I really really want one ) Anyone got any guesses?

[1FASTLASER]

I'm morbidly curious about what this hull can do on stock and/or conservatively modified motors. (Mostly cause I really really want one ) Anyone got any guesses?

Whew fast fast and did I mention FAST!!!

[Hoss Marine Propellers]

IIRC, OMC built a custom one-off speedmaster type case that was overdriven for the water speed record attempt boat. With this effort, the easiest thing to do would be to run a 1:1 SSMIV and put an overdrive trans in the midsection they build. The components they just got from Jon may include a 2-speed trans he did (I saw the pics before, so maybe they got them), but that could be reconfigured to be OD.

From my calcs, 9000rpm, 35% OD (1:0.74 OD box - that's a Lenco ratio), 5% slip with a 20p prop is 218mph.

We did get the 2 speed.

The two speed Lenco is the way to go, for sure!!!
A good friend of mine, Dave Bentley, built one inside a 20" mid & stuck it on an Allison XR2001 (Late 80', early 90's???). The gear ratio was pretty close. He would down shift it (underdrive) to start and zip up to 6000 rpm, shift (air-shift) into direct drive (1:1)and the rpm would drop back to 5000 and start pulling again..... Never let off the throttle!!! The boat had a small wobble when the shift happened ...... other than that, it ran great!!!!
There are many, many ratios to play with.... To overdrive the Lenco, just turn it upside down. It's a bullet proof transmission too!!!!!
I use to have a video of it running, but haven't come across it in years & wouldn't know where to look? It was cool to hear the rpm change so quickly and the boat take off again.

[powerabout]

Merc made an outboard a few years ago with a 2 speed, not sure it made a production run but it was advertised as a production motor

[Hoss Marine Propellers]

Merc made an outboard a few years ago with a 2 speed, not sure it made a production run but it was advertised as a production motor

That's interesting.......
Because Dave Bentley had the Merc guys down to Grand Lake and showed them that it could be done..... many years ago.

[powerabout]

That's interesting.......
Because Dave Bentley had the Merc guys down to Grand Lake and showed them that it could be done..... many years ago.

google it
Mercury deuce high

[rock]

this it

[BarryStrawn]

Of all the ways to add a two speed transmission, the Deuce High has to be the worst. The only positive design feature is that it might bolt on to a standard midsection. Which is probably what some idiot in marketing decided was the critical feature.