Hi Tolja, I don't see the "4.390" at the Nanni site, so can't tell if it has NMEA 2000 output that could go right to your Axiom.

Probably not, but it may have J1939 gauge output, in which case there are numerous J1939-to-N2K gateways, like this:

https://yachtdevicesus.com/collections/engine-gateways/products/engine-gateway-ydeg-04

And if you find out that the engine has no standard data output, I recommend the Actisense EMU-1, which has worked well on my boat for over a decade:

https://panbo.com/actisense-emu-1-analog-engine-gauges-to-nmea-2000-happiness/

https://actisense.com/products/emu-1-nmea-2000-engine-data/

In all cases you should be able to keep your analog gauges.

Bear in mind there's not a lot of extra room on most chart plotters to display enough engine data to be useful.  You end up having to switch between pages, which can sometimes be slow.  That and you lose the focus of whatever was on the other page.  You're not seeing your charts when you're looking at engine data, and vice versa.

I've been down this road on more than one boat and unless you have more than one chart plotter display it often ends up being not worth the effort.  

And if you're looking to reduce/consolidate the number of gauges, there are screens from Maretron and others that can display multiple data values in a gauge-like fashion.  This way you can keep the engine data constantly visible while leaving the chart plotter to do it's job.  

Ask yourself what you think the chart plotter is going to give you that you're not already getting with the analog gauges?  

@wkearney99 I agree, Bill. But I also think that well-configured alerts are better than trying to watch gauges all the time. Standard engine alarms are usually don't go off until the bad situation is advanced, but most boats have sensors and the computing power to let you know when some value like oil pressure or raw water pump temperature has strayed outside normal operating values. That's what I want. Unfortunately, a lot of the display makers still don't offer customized alerts and alarms. Old rant here:

https://panbo.com/mfd-engine-monitoring-better-but/

The downside to alerts is you don't always see them, and few of the plotters/gauges I've seen have decent ways to see a history of the alerts.  No argument against them, as they are handy.  But many implementations are poorly done, as you mention.

With dedicated gauges/displays you arguably get better ways to track progression AND quickly check that everything is normal.  Needles on analog style gauges just have to be showing 'the right angle'.  If you've got twin engines they just have to be reading "the same".   Seeing a number doesn't really help you know *right then* that it's within a valid range.  For stuff like engine/oil/transmission temps you don't want to have to be calculating all the time.  This isn't to say that numbers aren't useful, they certainly are, they're just not always ideal for monitoring at the helm purposes.

It's an age-old problem where the "engineers" tasked with making products often have VERY LITTLE hands-on experience with how they'll be used in the field.  Coupled with management making asinine decision to cripple functionality because of marketing optics or other such silly notions.

I'd love to have a good chartplotter integrated event logging ecosystem.  But I'm not holding my breath on seeing it happen.  I say this as a career IT person, and even in that realm event logging/analysis/display remains a disaster of cobbled-together solutions.  Grafana is a fantastic toolset for addressing some of it but that's well beyond the ken of most boaters.