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Old 11-27-2019, 03:28 PM   #1
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Diesel fuel flow meter

Hi all you boaties. ⚓️⚓️
I have a single screw 370 hp Cummins. Iím wondering if anybody knows where I can purchase a fuel flow meter, and what would be a good brand. Maybe somebody has one connected to the fuel line on the Cummings I would be interested to hear what they have to say.
Happy boating
Regards James, New Zealand
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Old 11-27-2019, 03:35 PM   #2
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Welcome aboard. I had Floscans in a previous boat. I had heard that they went out of business but looking just now on their website it says they were bought out. The web site says they will have new systems out in 2020. Who knows?
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Old 11-27-2019, 03:40 PM   #3
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FlowScan would work. They’re US based but they deal internationally. I’ve had two of their systems with good results.

https://floscaninc.com/
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Old 11-27-2019, 03:44 PM   #4
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As FlowScan is not currently a player, you may want to consider Maretron. You'll need 1 FFM100, 2 flow meters (not sure of the part number) and a NMEA 2k backbone to connect it to.

Also, you'll need Maretron's software to program it.
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Old 11-27-2019, 04:33 PM   #5
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Hi guys appreciate the feedback thank you very much
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Old 11-27-2019, 06:04 PM   #6
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Originally Posted by Pau Hana View Post
As FlowScan is not currently a player, you may want to consider Maretron. You'll need 1 FFM100, 2 flow meters (not sure of the part number) and a NMEA 2k backbone to connect it to.
that's what I have and I love it! Pricey($$$$) but worth it. I had intended to show everything you need but am just too tired today to do it! Just Google Maretron Fuel System.
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Old 11-27-2019, 07:24 PM   #7
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For most trawlers, a fuel flow meter is just an expensive gadget. Just print out this data sheet and when you want to know fuel flow, look at your tach, note the rpm and check the prop curve (lower curve) on the bottom graph to read fuel flow. You will be within 10%.

Here are the Cummins 6BTA 370 curves.


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File Type: pdf Cummins 6BTA 370 hp data sheet.pdf (131.7 KB, 62 views)
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Old 11-27-2019, 07:26 PM   #8
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How are they worth it?
How long does it take to see a return on the $1000+ of parts and install?

Surely its easier to look at prop curve / burn in the specs, work on that and take your hand off the stick if worried about fuel burn.?
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Old 11-27-2019, 07:50 PM   #9
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I used the YDEG-04 engine gateway and the smart craft adapter from Yacht Devices to connect my QSB6.7 to my Raymarine MFD. It shows fuel burn, trip usage and a few other things. Cost was $245US. I also needed to add a connector to plug into the Seatalk system since there were no open spots available
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Old 11-27-2019, 08:32 PM   #10
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Hi, fuel consumption isn’t really an issue with me. It would be nice to know within certain parameters how much my boat is burning. From there it will be easy to work out an optimum rev Vs knots,
Appreciate the comments.
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Old 11-27-2019, 09:02 PM   #11
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Is the 370 a mechanical or electronic engine? If common rail, that information is already available. If mechanical, you need two flowmeters and a comprehensive calibration, once you've done that you don't need the flow meters anymore....
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Old 11-28-2019, 12:39 AM   #12
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Check out www.interactio.co
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Old 11-28-2019, 02:32 AM   #13
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Quote:
Originally Posted by djmarchand View Post
For most trawlers, a fuel flow meter is just an expensive gadget. Just print out this data sheet and when you want to know fuel flow, look at your tach, note the rpm and check the prop curve (lower curve) on the bottom graph to read fuel flow. You will be within 10%.

Here are the Cummins 6BTA 370 curves.
http://www.trawlerforum.com/forums/a...7&d=1574900751




David
Hi,

I looked at the cummins QSB 380hp curve (The values ​​are almost the same as bta) and my own chart and actual consumption run side by side quite accurately as you estimate. Wind, flow and surf increase consumption. It doesn't cost you the hassle and money to get a flow meter, just my opinion.

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NBs
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Old 11-28-2019, 07:08 AM   #14
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"Hi, fuel consumption isn’t really an issue with me. It would be nice to know within certain parameters how much my boat is burning. From there it will be easy to work out an optimum rev Vs knots,

A simple EGT gauge will give a good idea of how hard the engine is working .


The tried and true method of measuring fuel burn is a calibrated small tank , and a stopwatch.
Much easier today with a GPS than running s measured mile.
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Old 11-28-2019, 09:52 AM   #15
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How much does it cost to obtain a “calibrated small tank” and all the hoses and fittings to install it into the supply and return lines and provide a secure place to mount it? Perhaps a couple of flow meters is cheaper and simpler?
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Old 11-28-2019, 12:29 PM   #16
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Sorry but flow meters are just a gadget. All things considered I’d rather go to Spain.
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Old 11-28-2019, 12:42 PM   #17
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Just this morning I was looking to see what was available since scanflo went belly up and this looks like it would work. https://www.jv-technoton.com/products/dfm-d/
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Old 11-28-2019, 06:35 PM   #18
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Thank you everybody for your responses. I will do some research over the weekend while out boating. I wish you all a safe boating weekend
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Old 11-28-2019, 07:09 PM   #19
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I too see a flow meter as just another gadget, not especially useful on your garden variety trawler. It’s always a curiosity on a new vessel, but not essential.
Many of these units never get calibrated properly, and give inaccurate data, which can be dangerously misleading.
If you run your boat fairly often and keep a log of fuel consumed, run time, and speed, you will soon have some fairly accurate data to go on.
Unless you are traveling in remote locations where fuel is scarce, just keep the tanks topped up, I like to refuel at around 1/4 of capacity.
I always travel at 1400-1650 rpms, and estimate burn at 2gph, which is a little on the high side, but keeps me safe without having fuel gauges other than a dipstick.
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Old 11-29-2019, 12:26 AM   #20
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The first thing I did after I bought my 42 Nordic Tug was to have the Maretron fuel flow sensors installed on the engine feed and return lines. I cruise in areas of significant tidal currents, and use the fuel burn readouts to help optimize fuel efficiency. Going with the tide, that data can fine tune just where the boat should be in the general mid-channel area. Going against the tide, the data is very useful in working the back-eddies close to shore.

Sure, I have that chart that shows fuel burn vs rpm, but real-time data is great, IMHO.

Full disclosure: the boat came with quite a lot of other Maretron instrumentation :-)
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