Yamaha 2021-2023 Low Fuel Alarm, Reduced Fuel Tank capacity?

[Mr. GP1800]

I agree the fuel burn feature is quite accurate and if it was to get an update to fix it, I could live with the fuel level issue. But having both issues concurrently makes determining fuel remaining a challenge (not one that cannot be overcome, just a difficultly). I don’t run a chartplotter and have no desire for one, so my “remedy” is to unplug the alarm, and try to remember to check fuel used prior to shutting off while out, and keep a running tally. And I wasn’t trying to bash the work you’ve put in, it’s impressive and quite a benefit to our community. Lol, for me, electronics need to be in a plug it in and be done configuration 😂

Just look at the data I posted about each gauge level and how much fuel is remaining. You’ll have a good idea how far you have left

[Mr. GP1800]

Ok so out on a full tank, burped right to the filler neck and run to the first low fuel warning. A massive 36 litres of fuel to fill it up burped to the neck again. Ski is a monster, good at everything it supposed to do apart from measuring fuel 😂

Did you remove the check valve on the filler neck? That will let you get a little more fuel in the tank.

Heres what I just did. 46.5 liters.

[K447]

Ok so out on a full tank, burped right to the filler neck and run to the first low fuel warning.
… 36 litres of fuel to fill it up burped to the neck again. …

Several factors can affect the volume of fuel involved.

If trailer is tilted nose down while being fueled, the tank will accept less total fuel.
Level hull to moderately nose up on the trailer will help with ‘stuffing’ the fuel tank

If the factory check valve remains installed inside the tank filler neck, maximum fuel quantity that can be flowed into the tank is reduced

While riding, if the water is not smooth or the hull is accelerating with fuel level close to the low fuel threshold, fuel slosh can trigger the warning ‘early’
Slow down to idle and when the hull levels out, the indicated fuel level can rise above the warning threshold
For riding purposes, when slowing down to level the hull does not clear a level indicator, that is effectively when the warning is ‘in force’

With the above factors set to maximize the amount of fuel that is loaded into the Yamaha FX fuel tank, and the warning level confirmed with hull level, total fuel available from ‘really full’ down to stabilized level warning would be about 46 litres (12.3 US gallons, as measured by Mr. GP1800 on a recent ride)

[Wild Thing]

All done in controlled environment, stock check valve in place, constant warning on plane and at idle. Trailer levelled on both fills.

[Mr_Marty]

Update:
I rode the other day in fairly rough water. The alarm tripped. I was about five minutes from the marina so I went there and filled up. Only took 9 gallons.

Yeah, the gauge sucks.

[Reggie182]

We have to keep onto them.

[FX cruiser HO 23]

Hi

just wondering if you guys have access to the wiring diagram/schematic drawing of the 2023 FX series?

I'm willing to purchase

I've a 2023 FX Cruiser HO supplied in the UK, with the infamous, premature fuel level sensor with constant beeping with around 45% fuel left and the fuel trip resetting it's self when restarting the engine.

Trip information is still present on shut down, still present on powering up the ski, but zeros on start-up of the engine. My theory is a power surge on start-up upsetting the brains of the touch screen zeroing the trip computer also possibly this could be the cause of so many touch screens being fried. So need a schematic diagram of the full wiring circuit to put DC to DC converters in where required as anti surge protection circuit.

So any assistance would be greatly appreciated
Cheers 👍

[musubi]

Hi

just wondering if you guys have access to the wiring diagram/schematic drawing of the 2023 FX series?

I'm willing to purchase

I've a 2023 FX Cruiser HO supplied in the UK, with the infamous, premature fuel level sensor with constant beeping with around 45% fuel left and the fuel trip resetting it's self when restarting the engine.

Trip information is still present on shut down, still present on powering up the ski, but zeros on start-up of the engine. My theory is a power surge on start-up upsetting the brains of the touch screen zeroing the trip computer also possibly this could be the cause of so many touch screens being fried. So need a schematic diagram of the full wiring circuit to put DC to DC converters in where required as anti surge protection circuit.

So any assistance would be greatly appreciated
Cheers 👍

I have a 2022 FX HO and I purchased the entire Service Manual. Your ski and my ski should be identical as far as electrical diagram and components go. I tried sending you a private message with the diagram attached, but looks like your settings for private messaging aren't enabled.

If you can either enable this or send me your email, I'll gladly send you what I have for the electrical component/diagram. Let me know.

[FX cruiser HO 23]

Hi musubi
I think because I'm such anew member I'm not able to send PM's I have now check my sets may you can try again,
I have bought the online service manual for my 2023 but it doesn't have a full diagram unfortunately
Cheers 👍

[musubi]

Hi musubi
I think because I'm such anew member I'm not able to send PM's I have now check my sets may you can try again,
I have bought the online service manual for my 2023 but it doesn't have a full diagram unfortunately
Cheers 👍

Shucks, I still cannot message you.
Thanks for the reply I attached a snippet from the Service Manual ( Connection.pdf ) which shows the plug going into the touchscreen unit (Multifunction Information Center), and which wires are the positive and negative. I'm not familiar with the technical portions of low voltage stuff, but if we placed a surge protection between this power (positive side?), would that address the issue you think?

Another way I thought of this is, what if we connected the unit's positive and negative to a completely separate battery, isolating it from the stock system altogether. Would this work as isolating the unit from spikes?

My email is [email protected] if you'd like to continue through email, as I know this thread was more for low fuel alarm issue, vs the data reset.

[Teufelhund]

So, I checked on my ski, powered off, let screen power down, then just powered on screen without trying to start. My fuel used info was reset.

So, not doing that on the svho, I have someone in my ride group who has the 2022 Ho they don’t get a fuel reset so it’s possibly somehow wired differently.

[musubi]

So, I checked on my ski, powered off, let screen power down, then just powered on screen without trying to start. My fuel used info was reset.

So, not doing that on the svho, I have someone in my ride group who has the 2022 Ho they don’t get a fuel reset so it’s possibly somehow wired differently.

That's interesting. Thanks for sharing.

I powered my screen on the other day and not all of my trip values are being reset. Which makes me think that the touchscreen unit may not be getting the surge.

My main worry is the unit blinking out on me while I'm riding, sometimes far from help. Since then, however, I figured out a contingency plan should that happen, getting me back to safety and recovering my ski.

FWIW, those touchscreen units are still backordered with no ETA.

[K447]

… My main worry is the unit blinking out on me while I'm riding …

Why is that a concern?
Is there something making you feel that a dash failure is likely?

The engine should still start and run even if the dash unit failed, no?

[Wild Thing]

Why is that a concern?
Is there something making you feel that a dash failure is likely?

The engine should still start and run even if the dash unit failed, no?

Just an example, if you leave ski for say lunch, arm it with pin, and on return the dash is playing up, how do you enter the pin

[musubi]

Why is that a concern?
Is there something making you feel that a dash failure is likely?

The engine should still start and run even if the dash unit failed, no?

I'm not sure whether the engine will start or not with the unit inoperable. If it does, then great, I can still ride back to safety. With the newer WaveRunners, more of the power management is controlled through the multifunction information center, or the touchscreen unit. I just figured since you're able to electronically lock the system from starting through the unit, if the unit stops working, it wouldn't convey any starting. I hope I'm wrong.

It seems that the touchscreen unit has given out for some people with them, so it makes me concerned that it could happen when I'm out on the water.