I have a 2019 GW Fisherman 257 with a Yamaha 300. Anybody know why the gas tank doesn’t seem to fill all the way up? I added gas yesterday while boat was on the trailer and the computer says it’s only 80% full. The pump shut off several times indicating the tank was full, but computer still shows it’s not a full tank.
Gas Tank
- Thread starter TDub
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Sardinia306Canyon
GreatGrady Captain
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first guess is that boat sat a bit bow down
second guess is that the fuel level sender start to act up
third guess is that the tank vent is not working right
My aux tank sender does the same, sometimes don't even rise, but a hour later show full, so i am sure that i have to replace it sooner or later.
Not really a issue as i use only the used fuel value what is spot on.
Chris
second guess is that the fuel level sender start to act up
third guess is that the tank vent is not working right
My aux tank sender does the same, sometimes don't even rise, but a hour later show full, so i am sure that i have to replace it sooner or later.
Not really a issue as i use only the used fuel value what is spot on.
Chris
In my experience, gas gauge readings are suggestions
The angle of the boat makes a big difference. To add to the previous comment, a Stern down condition will fool the sender into thinking there is more gas that there really is. Just moving yourself from the helm to the stern can change the reading. The angle of the tank on land or on a trailer can be different than when the hull is in the water.
What gauge are you using to read the level?
When the fuel nozzle clicks off, it could mean that the tank is full-ish or that there is more back pressure than normal that is triggering the shut off.
If you are going to rely on the accuracy of your gas gauge, make sure you have keep your Tow Boat dues up to date.
The only way to know for sure what the levels and readings are is to empty the tank completely, set up the hull at a known angle, typically the angle the boat sits at the dock and fill the tank about 1/10 of the capacity at a time, stopping after each mini fill and letting the gauge stabilize. Log the readings for future reference.
The angle of the boat makes a big difference. To add to the previous comment, a Stern down condition will fool the sender into thinking there is more gas that there really is. Just moving yourself from the helm to the stern can change the reading. The angle of the tank on land or on a trailer can be different than when the hull is in the water.What gauge are you using to read the level?
When the fuel nozzle clicks off, it could mean that the tank is full-ish or that there is more back pressure than normal that is triggering the shut off.
If you are going to rely on the accuracy of your gas gauge, make sure you have keep your Tow Boat dues up to date.
The only way to know for sure what the levels and readings are is to empty the tank completely, set up the hull at a known angle, typically the angle the boat sits at the dock and fill the tank about 1/10 of the capacity at a time, stopping after each mini fill and letting the gauge stabilize. Log the readings for future reference.
Pull the sender and physically check the tank and let us know. Let's see if it is actually full or not before we go too far down some rabbit holes.
Have the boat as close to level as you can for this.
Have the boat as close to level as you can for this.
Sardinia306Canyon
GreatGrady Captain
- Joined
- Oct 11, 2023
- Messages
- 523
- Reaction score
- 101
- Points
- 43
- Age
- 60
- Location
- Island of Sardinia
- Model
- Canyon 306
Yep, same what i made on my BW 23 Outrage who had the fuel gage in front of the tank.
Before i left i climbed alone on board and controlled alone on the helm the fuel level and that worked rather well.
Then i had the old Yamaha Fuel management system with the turbine sensors and it worked - after some calibration - somehow well.
Chris