Dyne 20 I/O

Hi Daniel:

Are these three rivers industries boats? I did not know that an i/o was built past the 1978 "bubble top but after seeing twin rig's ads and this one, apparently the i/o's continued into the 1980's (and 1990's?). How many were produced and where are they now are two questions from me. I've never seen one until the aforementioned.

Kevin-

 

Hi Daniel (and the rest of those hybernating warm weather breathern):

I'd like to see the transom of the 20 ft i/o out of the water. The hull doesn't seem to have a lot of draft and it leads me to wonder if the transom profile is a low profile "V" hull.

One of the most chalenging obsticles with the newer inboard ski boats has been flattening the wake without creating a turbid or "hard wake." The hydrodynamics (excuse the pun) of an inboard with a flat transom (no "V") can achieve a flat wake but the turbulence due to hull drag and weight displacement will harden the table and slam a skier/footer upon impact, sending them off balance (or out of position). Kind of an upseting proposition when you pay +$15K to +$20K for a newer used ski boat. In my opinion, the pre-1996 Mastercaft Prostar190, post-1998 Malibu LX, and post-2000 ski natique hulls have been very sucessful with creating a flat/soft wake with minimal turbilance (i.e. don't have a second wake and/or don't have a hard wake which has the tendency launch the skier into orbit).

The older 18 ft hydrodynes provide an excellent, semisoft wake for open water skiing, but not alot of interior space for ski friends. I would be very interested to know what this hull looks like, how it performs, and how many of the 20 ft i/o are out there.

Happy New Years All!

Kevin-

 

Just an observation but the 1989 advertisment posted by twin rig suggests that the 20' i/o was built into 1989. Still curious how many went into production.

Kevin-

 

This hull is identical to the 20' outboard however they did put a little more hook in the hull to force the bow down because of the additional weight of a 350 V-8 in the back.

This deck mold is in Iola.

 

The 18 I/O also has just a little hook. It is so small that it is not noticeable. When they re-did my hull they sanded it out and since it is an outboard now, it does not need the hook.

jim

 

Kevinb,

I am curious to know why you are interested in an I/O instead of an outboard. The outboard is lighter and has more interior room than the I/O.

That gives it more load carrying ability and more room for the people. My 18 outboard is a converted I/O and I think it is better in all respects. I drove it quite a few years as an I/O.

jim

 

The boat in the brochure is the boat I have now. The hull # is THIC001M83G. I'm guessing this means Three Rivers Industries 001 first hull 1983 model. I was told by someone at Dyna-Ski (I think) he thought only 2 or 3 were ever produced. We know from the picture on media page at least one other was produced. Anyone know of any other 20' I/O's still around. My boat has been used most every weekend every summer since 1985. I still have and use it because I haven't found any boat at any price I would rather have. Still runs like new and looks real close to new. Only addition has been a ski platform I bought from Ab Jr in 1986 or so (same as the picture on media page). I was told this boat was a proto-type and sold as an demo.

Would love to here any other history on 20' I/O any one would share.

I also owned a 77 OB with 175 Mercury I bought from Ab Jr's uncle (I think) in Donaldsonville, Georgia. This boat was used as a demo at Sea World in Flordia I think to test the new big outboards against the twins and inboards. Ab left the boat in Georgia to keep from towing back up north. That's the story I heard.

Vann Owens
Birmingham, Al.

 

Vann,

After I wrote that last post I realized that you might think I was attacking your boat. That was not my intention at all. The 20 Dyne is more than capable of handling the weight of the V-8 and it is a beautiful boat.

I was thinking more along the lines of the difficulty of finding one for sale when the outboard is easy and will do the job.

Sorry,

jim