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Alternative To LMF 400 Gauge

Old 03-22-2019, 12:02 PM
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Default Alternative To LMF 400 Gauge

Would like to have a dedicated N2K gauge for fuel info. Seems the Lowrance LMF 400 is hard to find. I guess the Simrad IS35 is about the least expensive alternative? Any other suggestions?
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Old 03-22-2019, 12:34 PM
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Garmin makes NMEA2K gauges, but sounds like you might need a NMEA 2K gauge to calculate fuel consumption as well ? Not just show fuel level ? If true that is more than a gauge.

Jim
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Old 03-22-2019, 04:16 PM
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Originally Posted by jfwireless View Post
Garmin makes NMEA2K gauges, but sounds like you might need a NMEA 2K gauge to calculate fuel consumption as well ? Not just show fuel level ? If true that is more than a gauge.

Jim
The fuel calculation is done with the main MFD and the fuel flow sensors. The N2K guage would just displays the info. I guess the Garmin would work, but prefer to stay with Simrad/Navico. Cost is about the same, if not more with the Garmin instruments.
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Old 03-23-2019, 06:08 AM
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The IS35 is a good choice. LMF is ooooooold technology. Dinosaurs used them in their boats.

What engine are you hooking up to your network?
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Old 03-23-2019, 07:00 AM
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Yea look at the newer simrad ones, IS42 too
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Old 03-23-2019, 07:52 AM
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Originally Posted by Moonlighter475 View Post
The IS35 is a good choice. LMF is ooooooold technology. Dinosaurs used them in their boats.

What engine are you hooking up to your network?
No network for engines. They're 2005 Hondas, pre N2K. Also have a Simrad autopilot, wondering if that display would show fuel info? Not sure of model, have to check.
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Old 03-23-2019, 08:23 AM
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Originally Posted by catch232 View Post
The fuel calculation is done with the main MFD and the fuel flow sensors. The [NMEA-2000 gauge] would just displays the info.
In order for a separate NMEA-2000 display to show you the fuel calculation data performed in the FUEL MANAGER function of another different NMEA-2000 display device, that other device would have to be broadcasting its calculated data back to the network. I don't think that behavior is very typical.

The Lowrance LMF-400 gauges that you mention WERE able to show the fuel data calculated by another device: the Lowrance FUEL DATA MANAGER module (also called an EP-85R in an earlier version). That external module contained the actual fuel data, which allowed multiple devices to read the data and display it.

You should look into the details of the "main MFD" to see what data it can SEND. If the literature for that devices shows it can send its calculated fuel data to the NMEA-2000 network, then perhaps you can display that data on another NMEA-2000 device that knows how to use that data.
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Old 03-23-2019, 08:52 AM
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Originally Posted by jhebert View Post
In order for a separate NMEA-2000 display to show you the fuel calculation data performed in the FUEL MANAGER function of another different NMEA-2000 display device, that other device would have to be broadcasting its calculated data back to the network. I don't think that behavior is very typical.

The Lowrance LMF-400 gauges that you mention WERE able to show the fuel data calculated by another device: the Lowrance FUEL DATA MANAGER module (also called an EP-85R in an earlier version). That external module contained the actual fuel data, which allowed multiple devices to read the data and display it.

You should look into the details of the "main MFD" to see what data it can SEND. If the literature for that devices shows it can send its calculated fuel data to the NMEA-2000 network, then perhaps you can display that data on another NMEA-2000 device that knows how to use that data.
Yea, I may need the Fuel data manager module too. Just not sure yet if I'll end up with another gauge/instrument. Thanks.
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Old 03-24-2019, 06:27 AM
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Look its quite simple - if you get the Navico NMEA2000 fuel flow sensor - this one

Navico: FUEL FLOW SENSOR PK

And create a simple NMEA2000 network using a starter kit, and use the Simrad IS35 as the display attached to the network, that is ALL you need. The separate FDM device is unnecessary because it is incorporated into the fuel flow sensor.

Between the IS-35, the FF sensor and the network kit, its going to cost you quite a bit all up, but I guess you are the only one who can decide whether thats worth the expense just to get the fuel data....
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Old 03-24-2019, 06:47 PM
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Originally Posted by Moonlighter475 View Post
Look its quite simple - if you get the Navico NMEA2000 fuel flow sensor - this one

Navico: FUEL FLOW SENSOR PK

And create a simple NMEA2000 network using a starter kit, and use the Simrad IS35 as the display attached to the network, that is ALL you need. The separate FDM device is unnecessary because it is incorporated into the fuel flow sensor.

Between the IS-35, the FF sensor and the network kit, its going to cost you quite a bit all up, but I guess you are the only one who can decide whether thats worth the expense just to get the fuel data....
Yes, That is the sensor I got, (# 000-11517-001). 2 of them.
I remember reading some of your other/older posts about not needing the Fuel data manager. I'm just going to connect the flow sensors to an N2K network and use the NSS12 for now, (no additional gauge).
Thanks for your help.
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Old 03-24-2019, 10:32 PM
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Yes, the NSS will allow you to do the setup for the fuel sensors and will show exactly the same data as the IS-35 will show.

you will be able to show fuel data in the Simrad side bar, and /or set up a custom fuel data page with all the relevant info there.

Havent done a network setup using 2 flow sensors, but under the fuel menu, you shouls probably see a vessel setup menu, where you can set the boat details eg 2 engines and 2 tanks, and fuel capacity. The in the network menu, select each fuel flow device and set one as starboard and other as port.

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Old 03-25-2019, 05:49 AM
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Originally Posted by Moonlighter475 View Post
... in the network menu, select each fuel flow device and set one as starboard and other as port.

I brought this up in another thread and never got an answer. With 2 sensors, (twin engines) how do you know which is which? Do you run an engine during the setup?... disconnect a sensor?
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Old 03-25-2019, 05:02 PM
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Just unplug one from the network then you will know which is which.
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Old 03-26-2019, 04:41 AM
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Originally Posted by catch232 View Post
Would like to have a dedicated N2K gauge for fuel info. Seems the Lowrance LMF 400 is hard to find. I guess the Simrad IS35 is about the least expensive alternative? Any other suggestions?
i just put a LMF-400 on the parts for sale section. Looking for $125
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Old 03-26-2019, 06:10 PM
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Originally Posted by ByrdmanFL View Post
i just put a LMF-400 on the parts for sale section. Looking for $125
Thanks, I sent you a PM.
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