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Author Topic:   Garmin GFS10
sitotis posted 02-22-2008 12:48 AM ET (US)   Profile for sitotis   Send Email to sitotis  
I have a Garmin GFS10 on pre-order. This fuel sensor will allow me to display fuel consumption readings on my Garmin chartplotter. The GFS10 will be released next month. While investigating how it will connect to my 545s chartplotter, I found out from Garmin that I also have to buy a CANet Kit in order to be able to connect them together. This is true of the 400 and 500 series chartplotters. I am still waiting for them to post detailed manuals and wiring instructions on their site.

The CANet Kit seems like a waste because it comes with 40' of cable and I will only need one foot for this install.


CANet Kit:

sitotis posted 03-26-2008 04:17 PM ET (US)     Profile for sitotis  Send Email to sitotis     
This sensor finally arrived yesterday. I have a question for all of you that Garmin did not give me a definitive answer on.

The GFS10 comes with a small inline fuel filter that they instruct to install in the fuel line just before the fuel flow sensor. I already have a spin-on Yamaha 10-micron filter/water seperator. Should I bother installing the fuel filter Garmin sent me, or just assume it is overkill?

I'm guessing I will not be able to buy replacement filters from Garmin anyway for the one that came with the GFS10. It is sealed and the whole unit would need to be replaced at some regular interval. It is also another potential point of failure in the fuel system. So you can guess which way I'm leaning. I just wanted to run it by CW...

sitotis posted 03-26-2008 04:20 PM ET (US)     Profile for sitotis  Send Email to sitotis     
Here is a link to the GFS10 installation manual: GFS10FuelSensor_InstallationMulti-lingual.pdf to maybe help answer my question above.
edvb posted 03-31-2008 07:00 PM ET (US)     Profile for edvb  Send Email to edvb     

You probably will be fine with just the Yamaha filter. I have the same type filter for my Etec 90. I will not be using the filter supplied with the sensor.

edvb posted 04-05-2008 02:24 PM ET (US)     Profile for edvb  Send Email to edvb     
The GFS10 comes with a small 30-40 micron inline fuel filter.The Tech at Garmin got back to me on this. The Yamaha at 10 Microns is all you need. A 4 conductor non twisted cable and two 120 ohm resistors are all you need to finish the installation for the CANet.
sitotis posted 04-10-2008 02:17 PM ET (US)     Profile for sitotis  Send Email to sitotis     
I started installing and wiring this unit today. I concluded that Garmin did not think out very well how someone might connect the GFS10 to a 4xx or 5xx series chartplotter. The wiring diagram requires the CAN kit cable to be connected to BOTH the end of the NMEA 2000 cable with CAN harness (~5ft long) and there is also one orange wire from the CAN cable that must be connected to the end of the GFS10 power cable (~20ft long). The problem is created from the difference in length (~15ft) between the two cable coming out of the GFS10. In order for me to connect everything like the wiring diagram shows, I would have to cut the 20' wire to be the same length as the NMEA 2000 cable (~5ft) in order to splice and re-splice everything all together. I was not interested in creating all of these splices only 5ft away from the stern of the boat (near the bilge). The area is potentially too wet and I did not want the splices to come loose or corrode. The only resonable solution to me was to buy a NMEA 2000 extension cable which relocates all of this splicing up to the helm. I am a little irritated having had to buy both a CAN kit and now a NMEA 2000 extension cable totaling about $70 just to connect the 545S to the GFS10.

More to come after everything is up and running...

BostonHack posted 06-26-2008 06:21 PM ET (US)     Profile for BostonHack  Send Email to BostonHack     

Did you figure this out yourself or did you get support from Garmin? I am trying to hook up two GFS10 sensors, and thought I had it correct, but the 545s does not "see" the sensors. (It's been patched to 8.20, etc.) Garmin has not yet responded to my email request for help (two days and counting, they say they take up to three days to answer.) And forget about calling them - their support lines have 30+ minute waits...


an86carrera posted 06-26-2008 06:27 PM ET (US)     Profile for an86carrera  Send Email to an86carrera     
Are these all NEMA2000 connections? Can't the extra cable be pulled up to the console instead of cutting in the bilge?


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