We put a tube on the drive that attaches to the center rib for the anodes. Run the tube above the water line and that's it. Really simple

So might be worth a shot then on the Kaama's?

Does the diameter matter? Ones I have seen appear to be 1.5" - 2" in dia.

Oh yes, diameter matters. To big and you spin your wheels. To small and she doesn't feel it.

Tried some different sizes. The 42 mm was best for my FPT 570-diesels.

[ATTACH=CONFIG]532607[/ATTACH]

We're talking about ventilator tubing, right?

7075T6---that boat is wicked looking, what is it?

Hey Charles, I think his boat is one of the Aluminum Liquid Technology boats built in the US. I cant remember how many where built. like 3-4. In fact there is one in the OSO classifieds.

http://www.offshoreonly.com/classifi..._65032_600.jpg


addy# 65032 listed in the "Other" boat section. ck it out

so time to start talking about this again! Now that I have some actual seat time with the Kaama's I am very interested to see what aeration tubes would do for my setup. all in all i am very happy with the setup and the performance I am getting from the Kaama setup vs. the TRS's. Planning isn't bad at all with the 29.5 pitch 3 blades but not at all impressed with the 25 pitch 4 blades! regardless one trait I noticed with both sets of blades is that I have lost almost all ability to plow along at 8-10mph without being on plane. any RPM above 1000 while in gear and the props start to cavitate, then grab, then cavitate, then grab! So know its either no wake speed or on plane!

I am sure many of you are thinking "why would you need to plow along" but believe it or not there are valid times to do this. The lake I boat on has a river that has a long channel to enter the lake. The water can get pretty choppy in here but too busy with boats to jump up on plane so it would be nice to give it some throttle and pick the bow up and be able to overcome the washing machine effect of the water!

so back to the topic! I wonder if aeration tubes would help in this situation? If they would help here and even improve planability slightly then I think its worth it!

Rik mentioned above that tube size is critical, Is there a formula to determine the correct sizing or is it trial and error for each application?

Thanks
Jim

I can't answer your question about the size of the tube so you might have to try a few different sizes to see if it helps out with your problem , When I asked about installing some on my drives I was told it was for boats that had big props and could not spin them fast enough it get it on plane and was told it would not help me and what I needed was more blades or cup on the props that I had to get it up on plane faster