The question is whether or not a drive shower is effective when on plane with a Bravo Sport Master outdrive running as a surface drive? Since the prop would only be half in it seams to me that you wouldn't have any water at the pickup. I watched some videos on youtube of Arnason drives running and it seams to back up my theory. Has anyone videoed this from the transom to see? I couldn't find any on Youtube.

https://m.youtube.com/watch?v=Of1RY4M8VqM

Some run a shower being fed by the sea water pump

Here is a great video, this is a stern drive but not a bravo. Either way you bring up a good point. My Imco SC uppers pull the water from the water pick up in the lower to feed the showers. Are you running transom pick ups?

https://www.facebook.com/***********...1509932545937/

I am not running transom pickups.

You're going to tear up some props running a bravo style prop as a surfacing deal.

...among other things.

I have wondered this also, I added drive showers but not the lower fed style. Really don't know if they are doing anything.
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