Superbabi

I am thinking of changing my Bravo XR drive to a Arneson drive. Y2K Single BB. Rik, Jcap, FX-10.??? Any thoughts ???

Rik

Does this boat really need a lot of positive trim?

Have they put inserts in the mold to make the bottom carry itself better?

I am not concerned with getting on plane, running, steering, docking, running or handling or even the power as you aren't going to break it.

With the new Merc 18 degree rake propellers you will get quite a bit of bow lift from them, or even Herings 18 degree rake propellers make a huge difference.

But if the boat needs a ton of positive trim, cannot run a high X dimension Bravo due to bow height concerns then there is only so much that a propeller can do for the bow height in flat sticky water.

z.zuperboat

15k actually doesnt seem like such a bad deal for the package .Helm steering extention box drive mid plate. You still have to pay for installation. OH yes and props Not cheap and not alot around to demo. My prop shaft with the speedy is 1.5 below with a 9 inch notch transom. Your going to need a big diameter prop ,at least 17.5 with the shaft at even or 1 above the bottom.Also 4 or even 5 blades! Thats a 4-5k prop. The height of the notch is probably also around 9 inches because you have to measure the thickness of the flat spot that goes back 9 inches. You need room for the box bolts on the inside. Trimming the drive down to get clean water will put it at a bad angle and push the nose down. My thoughts are the notch has to be filled. Gary post a picture of the notch ! I myself had a good day short morning blast at 94.

JCPERF

Your gonna get shafted

Superbabi

Rik, to reach top rpm the drive does need to be trimed up.

Superbabi

A shot of the notch.

Pat McPherson

I recently saw a 27' Excalibur down at the boat launch with a surface drive; don't know if it was a Kama or Arenson.
This is a pretty similar hull to the Super and the shaft came out real low on the transom, no notch.
I didn't have time to BS with the guy, but if I see it again, I'll take some time.

Rik

Unfortunately, the notch is too large to mount the Arneson without modifying it.

The Arneson would mount too high to be correct.

What is your propeller shaft height in comparison to the bottom of the boat?

z.zuperboat

See a picture is worth a thousand words !! Rick see how high the drain plug is in the back ! The bottoms pretty thick ! If the notch was filled would the thickness of the floor still be a problem for bolting on the box ?

Pat McPherson

3-1/2 to 4 inches.