MAN 800 Marine Diesel Won't Start 

It’s a PITA until you need it 😂

That would likely be a bit undersized for a 165' since these engines are 1900hp ea. Here is some more info. www.engines.man.eu/global/en/marine/yacht-engines/in-focus/The-Lionking_-MAN-V-12.html

All depends on what type of hull is used. Displacement hulls don’t use a lot of power and are slow. A planing or semi displacement hull most of the time use high horse power and high speed diesels. I’ve worked on a 120’ Feadship with a pair of derated MAN V8-900 and I’ve also worked on a Azimut 72s with a pair of MAN V12-1800. It all depends on what the boat is built for. As for the MAN V12-1900 it is a proven engine at this point with very few problems. I think the standard warranty is two years but you can buy extended four year coverage.

Were just getting back into RU-vid, sorry for the VERY late reply. You can email us FHG@fhgmarineengineering.com if you still have questions or have other engine questions

Waste gate or boost pressure sensor would be my guess. I have seen one or two CR engines that have had a load of bad fuel run through them and trash the high pressure pump.

There can be as many indicator lights, bells, buzzers run off the system as one wants. Same goes for an override switch.