Marine Electronics Forum - Quick Lowrance Net question.

THE HULL TRUTH is the world's largest FREE network for the discussion of Boating & Fishing. Whether you're researching a new boat, or are a seasoned Captain, you'll find The Hull Truth Boating & Fishing Message Forum contains a wealth of information from Boaters and Sportfishermen around the world.

View Full Version : Quick Lowrance Net question.

06-07-2007, 01:40 PM
Well I finally ordered the EP-50 from ishop and its on its way. My question is this....Do I need to have the Lowrance display units on in order to record fuel usage? Or will it record as long as the NMEA bus is powered up?

RUDE Attitude
06-07-2007, 02:58 PM
I'm educated guessing, but I'd say no, the LMF displays do not have to be on. They are just that, displays. They don't send any data to the network..... The EP-50 advanced fuel options gather data from the EMM, other EPs, and LGC units, ie sensors. But, the LMF units DO interface with the EP-50 to reset the advanced fuel options. Might be a good question for the Lowrance techs.

06-07-2007, 03:25 PM
Good question - Rude's logic sounds right, but I'd be guessing.

I am recently wondering about just getting the EP-10 fuel flow modules for my Low. network, and forgo the LMF guage altogther until I am ready to modify my dash - just pull up the fuel flow info as an over-lay on my LCX-110 screen. Not sure you can do it or not, but is a similar question as yours as to the if the LMF guage add any "brains" to the system, or are just reflecting what the modules are telling them...

06-07-2007, 04:02 PM
I can't prove it - yet (don't have my setup installed yet - new boat), but electronically speaking, I doubt any of the sensors save up the data and then will give it up later. To do that, a sensor would need to have its own "memory" and give up the contents of that memory when asked by another unit. I do not believe that's the way the sensors on the NMEA 2000 bus work. The only exception to this would be an engine interface where its just making stored computer info available on the bus.

This is easy enough to test. All one has to do is zero out fuel used, then run for a little while without the display turned on then turn it on and see how much fuel it says you used.

KB - what you want to do should work fine. Its the sensor that makes the data available, you can choose to use the data from any sensor on the bus with any unit that is capable.


06-07-2007, 04:52 PM
I don't have any sensors other then the GPS module. I am using the NMEA for fuel management only and that info is being pulled directly from the engines. and I do have the memory module (EP-50) on the way.

06-07-2007, 05:22 PM
I think you'll need the 3" gauge to use the data. The EP-50 is a flash device and will store data, but I think you'll need the gauge to reset them. There are two data points to reset. Seasonal Fuel and Trip Fuel.
It treats the fuel management as a special page.

I have not worked with a chartplotter NMEA 2000 to see if it is possible. I awaiting the Garmin 5000.

06-07-2007, 05:56 PM
I already have the fuel management working on my Lowrance GPS and DF displays. It just won't record the fuel used or remember how big the tank is without the EP-50.

06-07-2007, 06:33 PM

RUDE Attitude
06-07-2007, 07:49 PM
I just had a quick look at the LCX-113 and the fuel management setup allows the tank refill, add fuel, and trip reset. So, if you have a head unit with these options, you're good to go with the EP-50 installed. I also turned my gauges off and let the motors run for 20 minutes. The fuel trip fuel used change by 0.5 gal.

06-07-2007, 10:08 PM
I was going to post along explanation of that earlier but had to run. You can do whatever you need to on your lowrance gps if it has the correct software. The setup can be a little goofy but once you get it figured out it's pretty good. I had to calibrate once and haven't had any trouble since.

Texel Tom
06-08-2007, 04:47 AM
There is a difference here between 'Live' and 'Accumulated' data. Accumulated data such as 'Fuel Used' and information requiring historical data for calculation purposes such as 'Range' currently requires a memory module somewhere on the network. This device is also required to retain 'Boat Set Up' data such as number of engines/tanks etc. although this will possibly be held in the head unit in the future.

With a Suzuki interface cable there is an in-line memory module which will fulfill this role however with Yamaha and Evinrude it's just a cable. Without a module on the network you will still get 'Live' data such as 'Fuel Rate' but there will be no historical record. Both LMF gauges and full size head units are used to administer the network during set up and on-going management but do little else other than display the data available.

Before the EP-50 storage device became availalble we did use an EP-15 Fluid Level (without connecting it to a sending unit) and this seemed to fulfill the memory function.

It is correct to say that the GPS/Sonar does not need to be switched on for the data to be retained and updated on the network.


06-08-2007, 10:07 AM
ScarabC - thanks for confirming - you just saved me some extra hassles. I will drop the fuel flow into my network, and hold off on the LMF gauge until I am ready to modify my dash.

Search Engine Friendly URLs by vBSEO 3.2.0