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Fuel Flow Meter: Opinions requested

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  • Fuel Flow Meter: Opinions requested

    Keith

    1993 27' Crownline 250CR
    Volvo 740 (7.4 ltr. engine)
    DP-D1 Sterndrive

    iboats.com: A boat owner's best friend... if you're fortunate enough to be on land!

  • #2
    Re: Fuel Flow Meter: Opinions requested

    I have a Navman tracker 5500 chartplotter with the optional fuel sender.

    I love it!

    Gives instantaneous mpg or gph or km/l.

    The tracker was aound $300 after rebate and the fuel sender another $100 or so.

    It has paid for itself a few times over already as I am able to dial in the best mpg and save fuel.

    I believe that Northstar has bought out Navman but still sells the trackers.

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    • #3
      Re: Fuel Flow Meter: Opinions requested

      I just picked up one of these on ebay; http://www.cruzpro.co.nz/fu30.html I got the FU30. They have 2 left at a clearance price of $123US See the specials here.

      I have yet to install it because you have to start with an empty tank, then fill it 1/16th of a tank at a time to program it. But, it gives all the info you're looking for, and then some. Best part is the hook up seems incredibly simple. The only down side that I'm seeing is that it's a 55mm gauge, as opposed to the standard 52mm, so mounting it could be fun. Probably going to get a gauge pod for it.
      1994 Bayliner Capri 1604 w/94 70 Force (sold)
      1984 SportCraft 222 OFF w/84 Mercruiser 488 & Alpha 1
      1979 Sears Gamefisher 13'6" Aluminum w/1959 Johnson 10HP
      1969 Smokin' Hot Wife

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      • #4
        Re: Fuel Flow Meter: Opinions requested

        Looks a bit 'funny'.
        Seems to operate from the fuel level sender in the tank only.
        What happens when trim-angle changes?
        If calibrating with boat 'horizontal' on the trailer and not at floating angle?
        Without a flow-sensor, I would put it more as a gimmick than a reliable tool.
        No wonder a 'clearance' sale.

        Comment


        • #5
          Re: Fuel Flow Meter: Opinions requested

          For about five years I have been using a fuel flow meter which measures fuel flow using an in-line flow sensor that is installed into the fuel supply line to my outboard motor. The accuracy of the fuel flow measurement is good at moderate flow volume. At very low flow volume the sensor is not very accurate. At very high fuel volume the sensor is reasonably accurate, but not as accurate as it is at lower flow rates.

          The instrument provides a tank level indicator, but only as an imputed measurement, deduced by subtracting the fuel flow from an existing tank level that was set by the operator. The accuracy of the device depends on the operator consistently and reliably entering into the instrument all fuel volume added to the tank.

          The flow sensor can be adjusted or calibrated. Following many hundreds of gallons being run through the sensor, I began recalibration of the sensor based on my own data. This improved the accuracy of the sensor somewhat. With some field calibration the flow sensor accuracy can be improved to less than 5-percent error.

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          • #6
            Re: Fuel Flow Meter: Opinions requested

            Yeah, I agree with Haffiman.

            That unit does not measure the actual "flow" of fuel. I would be leery of that unit for this reason. I've had the cork on the end of my fuel sending unit to become "saturated", for lack of a better description. Subsequently it lost a lot of its buoyancy and my fuel gauge was not reading the correct amount of fuel in my tank.

            The type of meter I am looking for would allow me to enter the amount of fuel in my tank and it would measure the flow through the fuel line and constantly tell me how much is left.

            Whenever I decide what unit to purchase, my plan is: On a full tank, enter an amount of fuel that is 10% than the tank capacity. On my 80 gallon tank this will give me about 10 gallons in reserve. Based on my GPS data and some calculations I am getting about 2mpg cruising. Allowing for just one hole shot, that leaves me about +15 miles to dock before the tank is dry. I think this type of unit is more user friendly and surely provides more reliable data.

            So, does anyone want to comment on the Flow Scan units or the Lowrance LMF-200 that I am eyeing for purchase right now?

            Thanks!
            Keith

            1993 27' Crownline 250CR
            Volvo 740 (7.4 ltr. engine)
            DP-D1 Sterndrive

            iboats.com: A boat owner's best friend... if you're fortunate enough to be on land!

            Comment


            • #7
              Re: Fuel Flow Meter: Opinions requested

              Not necessarily on the topic of fuel flow meter...A rule of thumb for fuel usage is 1/3rd out and 2/3rd back. You don't want to go out far enough that you would need the exact same fuel in each direction. If conditions change and you are coming back with weather and won't be on plane, you will use a lot more fuel.
              1998 Wellcraft Eclipse 24 Cuddy
              Volvo Penta Duo-Prop 7.4L "LK"

              2006 Sun Tracker Party Barge 21
              Mercury 90 4-Stroke FI
              "Common sense is not very common"
              "Failing to prepare is preparing to fail." -- John Wooden

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              • #8
                Re: Fuel Flow Meter: Opinions requested

                Originally posted by rfdfirecaptain View Post
                I am considering purchasing the Lowrance LMF-200. I can get it for $189 +tax, locally.
                Don't forget to add about 75 bucks (per engine) for each sending unit (EP-60R).

                Comment


                • #9
                  Re: Fuel Flow Meter: Opinions requested

                  Pez Vela,

                  The $189 price includes everything needed. (www.********.com) I think it sounds like a reasonable price. And, although I haven't gotten the complimentary responses I was hoping for no one has posted anything negative about this unit. I'm going to give it about 10 more days before I purchase. So for now, it's wait and see what people have to say... if anything.
                  Keith

                  1993 27' Crownline 250CR
                  Volvo 740 (7.4 ltr. engine)
                  DP-D1 Sterndrive

                  iboats.com: A boat owner's best friend... if you're fortunate enough to be on land!

                  Comment


                  • #10
                    Re: Fuel Flow Meter: Opinions requested

                    Some decades back (LOL), I worked for VP in Sweden.
                    One of my tasks was to consumption test different engines in different installations.
                    For the bigger engines I mainly used PLU flow-through sensors, and they were not that 'bad', but to stay within given tolerances, they had to be rather frequently calibrated.
                    What I soon discovered was that running a flow meter in a suction line was not too god an idea.
                    The most reliable was to use a feed pump before the meeter and in connection with a vapor chamber. This to always keep a positive pressure in the sensor unit.
                    This link gives an indication on the system I used:
                    https://www.avl.com/c/document_libra...&groupId=10138
                    However I doubt most boaters will put that in their boats for a couple of hours pleasure ride.Weight and cost rules it out.
                    So whichever flow sensor used of the 'normal' ones, they will be rather inaccurate.
                    Just use a 'calibration tank' from time to time to check it out. A 5 Gal outboard tank should be easy to hook into the system.
                    When installing, make a by-pass option. No fun when it jams up and restricts the fuel!
                    In general I think one is as good or bad as the other.
                    Be sure to get a system certified to be used in E10 fuel systems!!!

                    Comment


                    • #11
                      Re: Fuel Flow Meter: Opinions requested

                      Originally posted by rfdfirecaptain View Post
                      The $189 price includes everything needed. (www.********.com) I think it sounds like a reasonable price.
                      You're right ... if they're not sold out I'd be all over that like a cheap suit.

                      Comment


                      • #12
                        Re: Fuel Flow Meter: Opinions requested

                        Have a look here for the Northstar: http://www.thefind.com/electronics/b...l-fuel-display

                        Comment


                        • #13
                          Re: Fuel Flow Meter: Opinions requested

                          Originally posted by rfdfirecaptain View Post
                          So for now, it's wait and see what people have to say... if anything.
                          I'm not keen on it

                          My LMF200 works intermittently.

                          If I start the boat with the fishfinder on, and the bilge blower- the display will not stop flashing 3 dashes.

                          I have to kill the FF and BB, then restart to get it to read fuel flow.

                          Also I CANNOT get the fuel level countdown to work- the bar gauge shows full despite my going through the setup in the manual about 10 times....

                          If I was going to do it again, I'd look for a fishfinder that has NMEA2000, can show fuel consumption and supports Navionics... if there is one

                          Otherwise, I'd go with the N* F210
                          Baba-buoy.

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                          • #14
                            Re: Fuel Flow Meter: Opinions requested

                            For those of you with the LMF200 fuel system, the reason that their system is either intermittant or doesn't count fuel remaining correctly, it's because you need another device for MEMORY! The LMF400 has the memory built in.....not the LMF200

                            EP-85R

                            http://www.lowrance.com/Products/Mar...torage-Device/

                            click downloads and read the manual

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                            • #15
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                              Keith

                              1993 27' Crownline 250CR
                              Volvo 740 (7.4 ltr. engine)
                              DP-D1 Sterndrive

                              iboats.com: A boat owner's best friend... if you're fortunate enough to be on land!

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