question

[formulaben]

Hi, hoping the knowledge base here will edjumacate me on the concave area above the propeller on an old(er) Tige I saw recently. Any info/history on this feature is much appreciated.

[BraceMaker]

From a marine design standpoint the prop pocket let's a prop be closer to the bottom of the hull. Makes draft shallower and decreases angle on the shaft/engine.

 

I suspect ski boats first got them when gear reduction trans began to get popular and 14" props were installed.

[Edbrazil]

Think that it was when the MasterCraft Powerslot came out. Either late 1970's or early

1980's. I remember there was one at the Marine World tournament, brought by the

LaPoints. Who were very secretive about it, especially when it was out of water. The

stern was covered up by a towel or similar. The boat may also have had a geared drive,

instead of the straight through 1 to 1.

[thompjs]

Some 1980 models had the 1.5 to 1 trans wth big prop as I remember. I think the reduced the prop diameter in 1981. I had an 81 and it was a great boat for the time.