Fuel consumption measurement
- Thread starter JohnS
- Start date
ship happens
Crew Member
Most new outboards that are propped accordingly, you can basically know by manufacture specification on fuel burn, GPH @ RPM duration. Not sure what yamahas is as I don't really stick my head into that one far enough to give a ****. However the data is there if you can find it. Look for fuel burn @3500/4000/4500 RPM
Interesting.. so those numbers will hold up regardless of what prop is on there (size, pitch etc?)?
ship happens
Crew Member
Not exactly. Like I said, propped accordingly however they prop recommend their engines. So it's not 100 percent accurate boat to boat, however is a great ballpark. Plus or minus 10 percent. If your an idiot and have way to small or big of a wheel then maybe that percent goes up
We already know 2 key things here with injection.. we know
Injector duration
Injector nozzle size(engineered volume)
Fuel pressure
With that based on RPM, you can get fuel consumption. Now combine that with engine load and there's another math equation. That's where by the time your in the ballpark you might loose the 10 percent or so.. depending
Last edited:
kaelc
Crew Member
Lowrance has an interface cable I used to have for my 115hp. I would imagine Garmin has the same. I bought it off ebay for $150 or so. They also have a flow scan thing, but not as reliable and doesn't give the other engine data which is nice to have.
ship happens
Crew Member
For example
www.boat-fuel-economy.com
US Gallons | Outboards Mercury - Evinrude - Yamaha - Suzuki - Honda - Tohatsu - Outboard Fuel Consumption per Hour GPH boat fuel economy
Boat Fuel Economy Outboard Motors : Mercury - Evinrude - Yamaha - Suzuki - Honda - Tohatsu | Fuel Consumption per Hour - US Gallons GPH MPG | Also: Liters and Imperial Gallons per Hour
If you happen to come across the interface cable somewhere online please let me know.
kaelc
Crew Member
Aquaholic
Crew Member
That is a handy site, thanks.
Then convert to Imperial gallons. US gallons x .833 is what I use.
Damn Ugly
Well-Known Member
I was looking at buying one of these, but my new Merc came with the built-in VesselView sensors & app which gives me everything I need.
www.naviflow.it
NaviFlow | Marine flow meter Installation
NaviFlow | Marine flow meter, without the passage of cables or holes, Monitor the consumption of your outboard or sterndrive.
SpringVelocity
Crew Member
On my suzuki gauge I have all that stuff but I really question my electric readout on fuel tank readout when i put in now outboard. Seems a bit off with tank level.
Stupid question can I still run my old analogue gauge as well at same time? Do I need any different harnessing to hook it up? Do you need two level senders top do that?
Sorry to hijack your post......
Stupid question can I still run my old analogue gauge as well at same time? Do I need any different harnessing to hook it up? Do you need two level senders top do that?
Sorry to hijack your post......
ship happens
Crew Member
You should be able to, however that's a really good question. Since the input for that suzuki system is going into a transistor controlled unit basically, it could have impedance bleedback so to speak. The mechanical guage works on resistance (impedance ) to ground, so if anything if the zuki part does change that impedance I don't see why you couldn't just put a diode in that line. Should try it and see what happensOn my suzuki gauge I have all that stuff but I really question my electric readout on fuel tank readout when i put in now outboard. Seems a bit off with tank level.
Stupid question can I still run my old analogue gauge as well at same time? Do I need any different harnessing to hook it up? Do you need two level senders top do that?
Sorry to hijack your post......
Olde School
Well-Known Member
I have found this to be surprisingly accurate.
It has correlated almost perfectly to actual consumption for 4 different boats for me.
It also correlated almost perfectly with my Yamaha/Lowrance interface.
www.boat-fuel-economy.com
It has correlated almost perfectly to actual consumption for 4 different boats for me.
It also correlated almost perfectly with my Yamaha/Lowrance interface.
Liters | Mercury - Evinrude - Yamaha - Suzuki - Honda - Tohatsu - Outboard Fuel Consumption per Hour LPH
Boat Fuel Economy Outboards: Mercury - Evinrude - Yamaha - Suzuki - Honda - Tohatsu | Fuel Consumption per Hour - Liters | Also: US and Imperial Gallons per Hour
Maybe this is the way to go.. my current plotter (hook series) doesn't have a nmea port
Aquaholic
Crew Member
can you do troll control with that set up?
Brando
Well-Known Member
Have you recalibrated on the gauge and do you know your tank size accurately. I question mine sometimes as well but it does seem to be quite accurate. If you drain the tank you can go through the manual tank calibration on the gauge in setup I think you fill 1/4 tank at a time from empty. If your not using the reed switch style sender it’s worth switching.On my suzuki gauge I have all that stuff but I really question my electric readout on fuel tank readout when i put in now outboard. Seems a bit off with tank level.
Stupid question can I still run my old analogue gauge as well at same time? Do I need any different harnessing to hook it up? Do you need two level senders top do that?
Sorry to hijack your post......
SpringVelocity
Crew Member
It was calibrated at dealer when they set it up....But no haven't recalibrate it.
Buckethead905
Well-Known Member
Yamaha Digital Speed/Fuel gauge
Yamaha part number is 6Y5-83570-A0-00. As new condition, looking around online they’re going anywhere from $320-$400 USD.. Asking $275 CAD. Located in Nanaimo.
sportfishingbc.com
Is this what you’re looking for?
Similar threads
