it is a fractional hp WMT pump ...remember from the prop pump...
http://www.w-m-t.com/productsingle.asp?PID=86 ...and this one is from the parent company
http://www.matsusakaltd.co.jp/P.4E.htm...sorta like koizyme. thread...someone that does post here sent me that pic from when he was out and about.
I hope he will come and talk about it...I asked if I could post the pic but he is the one that should talk about it.
and no it is not mine...you see that clear water in the pump pit....mine is down to 6 inches of visibility
BTW that is at least 5 inch piping.