Available Duo-Prop

[wwahl]

https://seattle.craigslist.org/see/b...378380823.html
For those of you that want to upgrade your Volvo it appears you can buy the Duo-Prop outdrive for $1,000 and the propellers for $300. This is someone else's listing. I did this conversion on an AQ260 powered Ski Sporter I owned at the time and it transformed the boat miraculously.

[f_inscreenname]

Ya but if aint the right props for your boat you will be looking at 1000 to 1300 for props. That is the number one reason I never went D/P.

[Morgan's Cloud]

Ya but if aint the right props for your boat you will be looking at 1000 to 1300 for props. That is the number one reason I never went D/P.

That logic would certainly apply if one was buying this (or any) bundle hoping that it would work first time for them but if you're buying new it's a whole different scene .
I actually got it right on twice . Once with the B3 and then with the DPS/a

What I'm really curious to hear about is the OP's experience with the miraculous transformation it worked for him ! !

[wwahl]

That logic would certainly apply if one was buying this (or any) bundle hoping that it would work first time for them but if you're buying new it's a whole different scene .
I actually got it right on twice . Once with the B3 and then with the DPS/a

What I'm really curious to hear about is the OP's experience with the miraculous transformation it worked for him ! !

I could pop a skier up without effort. When coming in to the boat lift and putting the drive in reverse it was 100% predictable what the boat was going to do. The dual drive increased my top speed to 60 mph on the GPS. This is with a Volvo AQ260 motor. I could maintain plane at 2,200 RPM.

[Morgan's Cloud]

I could pop a skier up without effort. When coming in to the boat lift and putting the drive in reverse it was 100% predictable what the boat was going to do. The dual drive increased my top speed to 60 mph on the GPS. This is with a Volvo AQ260 motor. I could maintain plane at 2,200 RPM.

For a long time I was under the belief that D/P units were better suited for larger hulls . I don't know if you've seen me say it before elsewhere but after the total rebuild of my St T It was re-powered with a new 350 Volvo and the single prop SX/a drive . It was virtually un-driveable, to my total shock .
Playing with props made no difference so I bit the bullet and swapped out the SX/a for DPS/a and it's now a totally different boat.

After many decades of playing around in moderately well powered single engined boats it was a shocking lesson in how much of an effect a single prop has in throwing the boat around without the driver even really knowing it .

[Ghost]

I would not expect duoprop drives to increase, or even match, top end speed with a single prop. Certainly not if the single was any flavor of Merc. That sounds fairly unusual. (Perhaps it’s the case with the old style single prop Volvos though. The ones that have seemed so hydrodynamically limited, hitting a bit of a wall close to or a hair above 60.)

But I’d expect dual prop drives perform better in every other way than any flavor of single. Propsets are pricey, but the behavior of the boat is great in my experience.

[wwahl]

For a long time I was under the belief that D/P units were better suited for larger hulls . I don't know if you've seen me say it before elsewhere but after the total rebuild of my St T It was re-powered with a new 350 Volvo and the single prop SX/a drive . It was virtually un-driveable, to my total shock .
Playing with props made no difference so I bit the bullet and swapped out the SX/a for DPS/a and it's now a totally different boat.

After many decades of playing around in moderately well powered single engined boats it was a shocking lesson in how much of an effect a single prop has in throwing the boat around without the driver even really knowing it .

One of my neighbors here on Lake Washington was Bill Cook a long time Boeing man. He saw what I did with the Duo-Prop and gave me a lesson on turbo prop airplanes. He showed me how a mechanical advantage occurs where these two different diameter counter rotating propellers work. So where it might appear more bulk is moving through the water, the advantage overcomes this in a multiple effect.

[gorgar]

https://seattle.craigslist.org/see/b...378380823.html
For those of you that want to upgrade your Volvo it appears you can buy the Duo-Prop outdrive for $1,000 and the propellers for $300. This is someone else's listing. I did this conversion on an AQ260 powered Ski Sporter I owned at the time and it transformed the boat miraculously.

I have a 1969 donzi with 302 ford with 270 Volvo outdrive I have always wanted a dp set up any help setting me up with what I need and where to get it would greatly appreciated Thanks Jim craw5551@comcast.net