2021 Yamaha 190 FSH fuel gauge accuracy

[FSH 210 Sport]

Trip meter indicate 12.9 gallon used for 35 miles. I always fill up after boating before I park the boat and yes some pump auto stop before full tank so u gotta take that into account. And yes the gauge stuck in 100% most of the day, drops towards end of the day to 73 right before I got to the dock.

What is the lowest percentage you have seen on your fuel gauge?

 

[fatboyroy]

What is the lowest percentage you have seen on your fuel gauge?

73% I wanted to empty out the tank maybe it’s accurate when gas tank is in low but I always fill it cause I go off shore most of the time

 

[FSH 210 Sport]

73% I wanted to empty out the tank maybe it’s accurate when gas tank is in low but I always fill it cause I go off shore most of the time

Right on…

@drewkaree had a good thought on running the fuel level down to 25% and see if it calibrates the sender. I totally get you wanting to head out with a full tank so it looks like you‘re just going to have to go for a longer series of runs the next time you’re out To get the fuel level down below 25%. You have verified the “fuel used” function of your trip meter is accurate so fuel usage can be tracked that way to maintain a safety margin.

 

[tdonoughue]

My boat is much older than yours, probably with a different sender and definitely with a different receiver/gauge. But on mine, I can run for an hour or two and it will still be on full. Then when it comes off full, it drops pretty consistently (as far as I can tell--never exactly measured it) the rest of the way.

 

[TexAg16]

@TexAg16 Did you verify that by refilling and checking the fuel put in vs. what the gauge indicated?

@fatboyroy how does the fuel used compare with how much fuel you put in? As a FYI, on my 2020 210 FSH the fuel graph turns yellow at 16%. The low fuel warning came on once at 10% I think…I’ll check my manual and see if that agrees with what I remember.… the manual does not state at which level the low fuel warning comes on.

On my boat, I have found the gauge to be very accurate. From full it takes a bit to drop while moving, when it does, it will drop to between 86-92%, then when I stop and am floating it will return to say 96%. When the tank is getting low the level will fluctuate by about 2-4% between starting and stopping but quickly returns to a static level once the boat stabilizes in either floating or running. I’ve filled the boat up about 6 times now and it takes an additional .5 to 1 gallon of what I calculated, I attribute this to fuel held in the fill hose from the tank to the fuel cap.

My transits are usually pretty short between stops, maybe 15-20 mins on average, and this may contribute to my fuel gauge being a bit more accurate vs. someone who makes longer trips. @Liveto99 what has your experience been? I’ll be making some long transits this summer so I’ll have a better idea then of the fuel gauge performance.

Looking at the parts fische I would think the fuel sender in my tank is a resistance type of sender and not a float type. Makes sense as a float type would be all over the place when on the water.

I was sitting at 67% in the driveway and went to fill up and it was only about one gallon off. I think the surprising thing is that it takes awhile for the initial cruise fuel to register. For example, when I put in and cruise out to wherever our first stop is, could be 20-30 min of cruise and still read 100%.

 

[FSH 210 Sport]

I was sitting at 67% in the driveway and went to fill up and it was only about one gallon off. I think the surprising thing is that it takes awhile for the initial cruise fuel to register. For example, when I put in and cruise out to wherever our first stop is, could be 20-30 min of cruise and still read 100%.

Right on…. thanks for the follow up!

I think the fuel fill line will hold at least a gallon of fuel, that contributes to the gauge not coming off 100% for a bit, also that would lead to a discrepancy between the connext trip meter fuel burned vs. percentage of what is left in the tank.

 

[Liveto99]

@TexAg16 Did you verify that by refilling and checking the fuel put in vs. what the gauge indicated?

@fatboyroy how does the fuel used compare with how much fuel you put in? As a FYI, on my 2020 210 FSH the fuel graph turns yellow at 16%. The low fuel warning came on once at 10% I think…I’ll check my manual and see if that agrees with what I remember.… the manual does not state at which level the low fuel warning comes on.

On my boat, I have found the gauge to be very accurate. From full it takes a bit to drop while moving, when it does, it will drop to between 86-92%, then when I stop and am floating it will return to say 96%. When the tank is getting low the level will fluctuate by about 2-4% between starting and stopping but quickly returns to a static level once the boat stabilizes in either floating or running. I’ve filled the boat up about 6 times now and it takes an additional .5 to 1 gallon of what I calculated, I attribute this to fuel held in the fill hose from the tank to the fuel cap.

My transits are usually pretty short between stops, maybe 15-20 mins on average, and this may contribute to my fuel gauge being a bit more accurate vs. someone who makes longer trips. @Liveto99 what has your experience been? I’ll be making some long transits this summer so I’ll have a better idea then of the fuel gauge performance.

Looking at the parts fische I would think the fuel sender in my tank is a resistance type of sender and not a float type. Makes sense as a float type would be all over the place when on the water.

My fuel gauge is right on. I ran it down to 2% it was annoying as hell listening to it. I filled it up on the water. I just did not wanna run it out in case there was a problem. They give you a few extra miles on your last 10%.

 

[Liveto99]

The tank has space for expansion if you really nurse the fuel nozzle you can fill that but you have to use that right away.
normally I just figure 1 gallon every 2% it works out well. Refueling on the water is a complete pain in the ass with 5gal jugs. If I do something like that again I’ll put in the 22 gallon tank and a fuel transfer pump. going about 30 miles an hour I did about 150 miles before I had to refuel.

 

[FSH 210 Sport]

Was at the lake the other day and decided to do a run down test. First got the yellow bars at 16%, the at 12% the bars turn red and the alarm starts going off. Was running around having fun not too far from the ramp, saw 10%, then 8%, then 5% then 1% just as I was coming back to the dock. While I was tying up, I had both engines idling, then the starboard engine shut off, port still running. Starboard engine would not restart. Put it on the trailer with the port engine, once out of the water the starboard engine restarted. Fueled up on the way home and I put 50 gallons in it, so if all is correct I had two gallons left in the tank.

 

[FSH 210 Sport]

@fatboyroy Filled my tank this evening. Fuel gauge showed 24%, and fuel used gauge showed 43.9 gallons used. I went with the fuel used gauge and it was spot on.

avg mpg was 2.7. That’s a fair amount of towing tubes, airhead stars and stripes and a big Mable, as well as a lot of trolling and just cruising around the lake.

 

[fatboyroy]

@fatboyroy Filled my tank this evening. Fuel gauge showed 24%, and fuel used gauge showed 43.9 gallons used. I went with the fuel used gauge and it was spot on.

avg mpg was 2.7. That’s a fair amount of towing tubes, airhead stars and stripes and a big Mable, as well as a lot of trolling and just cruising around the lake.

Thats great, I have a lot of boating time next week, will see if I can get my tank to go really low for 190 test.

 

[FSH 210 Sport]

Thats great, I have a lot of boating time next week, will see if I can get my tank to go really low for 190 test.

Im glad you mentioned the fuel used thing, I had seen it but never gave it much thought. I mix 85 non ethanol and 91 non ethanol to make 86 octane and the fuel used gauge makes that super easy now.

Octane Mixture Calculator

 

[TexAg16]

It finally happened. Took the boat on a two-day trip with one initial fill-up of about 42 gallons. Yesterday I ran out of gas and got a tow to the marina which was about 300 yards from where I stalled. As I was passing the marina, I was at about 17% and figured I could make it. The gauge then rapidly dropped from 17% to 4% in about 10 minutes. The gauge keeps fluctuating by 10% and it seems the only reliable way to fuel plan is to check the meter and see how much fuel you’ve used. Even then, I put in 13 gallons at the marina and the gauge went up to 50% which is totally incorrect.
Side note: I noticed nearly every marina only has 87 ethanol free. I trailer so I usually fill up with 91 or 93 back home but I’m curious what people do who have their boats in a slip if there’s no way to get 91+