BMZ generator? Anyone ever used or hear of them?

[bobfnbw]

Greetings. Saw a youtube video on these gensets and wondered if anyone has any experience with them. Not much on the web, and already did a search here. At first glance they look a lot like a Northern lights gen, but with some differences. Instead of a inboard gear driven water pump, they use a belt driven one, they say to prevent raw water to enter the engine, which at first glance sounds good, but we all know about belt issues on engines. So, any knowledge of these?
Thanks,
Bob