First that I've heard of it too! I have a Rossi Niagara that screams, they take some time to get broken in, but when they do, watch out! Is that the orange case? Must be that someone adapted a Nova Rossi back plate to one. ???
I just went a little further into the site. It looks like they have a Niagara outboard motor mounted on a Lawless lower unit. It could be possible that there is a Pirahna. There isn't much difference between the two except for 2,000 RPM. It might prove to be a MAC killer!