Fuel Gauge issue

aubreyhua

Recruit
Joined
Aug 7, 2020
Messages
2
Hello

I just purchased a 2017 Starcraft EX23 with a 140 Suzuki. We have been trying to diagnose the fuel gauge readings on this thing. We bought it with a full tank and did a couple little boating runs for a a couple weekends. I told my wife that it seemed really good on fuel. The third time we had it out the gauge was reading in between half and three quarters. We had about a five mile run back to the marina. I happened to glance down and look at the gauge and it was reading about a half tank. A minute later in between half and a quarter tank. A couple minutes later it was under a quarter. When we finally reached the dock I was pegged on empty. I was sweating bullets. On the way home I fueled the boat and it took on 30 gallons. The tank rating says 39 gallons. I have a hard time believing it would peg empty with 10 gallons still in it even though I realize it can't draw all 39 gallons. Yesterday we went 22 miles down the Tennessee. river and stopped at the marina where I topped off with seven gallons. The ride back up the river saw the gauge stay pegged on a full tank all the way back up the river. The gauge never moved. I would think being down 7 gallons should have shown some movement. I have a small dowel rod that I tried to stick in the filler to get a visual on fuel levels, but something prevents it form going in even though it's only a 3/16 dowel.. Could explain why I'm forced to fuel so slowly with the constant splash back.

Any ideas or suggestions?
 

tpenfield

Moderator
Staff member
Joined
Jul 18, 2011
Messages
18,040
:welcome: to iBoats . . .

Fuel gauges are really just 'approximators' not scientific instruments. It sounds like the sender that is in the tank is not reading the entire depth of the tank and reaches its 'stopping point' at about 1/4 of a tank.

Is this a pontoon boat? Not sure if the fuel tank is rectangular or has a 'V' shape to it . . . which can make a difference.

A dowel would not be able to go down the fuel filler, because there is usually a right angle fitting that the filler hose connects to at the tank. Many marine tanks fill slowly, but do make sure the vent line is clear.

My advice is get used to how the gauge behaves and fuel up accordingly. Also, read the gauge when the boat is at rest and as level in the water as it can be. Once underway, the fuel level is more tilted to the rear of the tank as per the boat's attitude in the water. 39 gallons is a very small tank for a boat of that size. It seems like you'd be filling up every other outing.
 
Last edited:

SHSU

Lieutenant Junior+Starmada Splash Of The Year 2019
Joined
Mar 8, 2017
Messages
1,725
+1 for what tpenfield said

Mine does something similar. I placed my sender in the back, so when I am underway all the fuel is in the back. So had to learn what my run time is before it goes to empty...

Side note, I had fun once coming back into Galveston bay with 2-4 ft seas because of wind. I had gauged my run time incorrectly because of seas... I was pegged on empty for almost 10 minutes before we made it to the ramp. You talked about sweating bullets, I was worried if the motor cut out I would have been pushed up on the rocks before I had a chance to do anything.

Lesson learned that day....

SHSU
 

aubreyhua

Recruit
Joined
Aug 7, 2020
Messages
2
Hello

I just purchased a 2017 Starcraft EX23 with a 140 Suzuki. We have been trying to diagnose the fuel gauge readings on this thing. We bought it with a full tank and did a couple little boating runs for a a couple weekends. I told my wife that it seemed really good on fuel. The third time we had it out the gauge was reading in between half and three quarters. We had about a five mile run back to the marina. I happened to glance down and look at the gauge and it was reading about a half tank. A minute later in between half and a quarter tank. A couple minutes later it was under a quarter. When we finally reached the dock I was pegged on empty. I was sweating bullets. On the way home I fueled the boat and it took on 30 gallons. The tank rating says 39 gallons. I have a hard time believing it would peg empty with 10 gallons still in it even though I realize it can't draw all 39 gallons. Yesterday we went 22 miles down the Tennessee. river and stopped at the marina where I topped off with seven gallons. The ride back up the river saw omegle online the gauge stay pegged on a full tank all the way back up the river. The gauge never moved. I would think being down 7 gallons should have shown some movement. I have a small dowel rod that I tried to stick in the filler to get a visual on fuel levels, but something prevents it form going in even though it's only a 3/16 dowel.. Could explain why I'm forced to fuel so slowly with the constant splash back.

Any ideas or suggestions?

Thanks my issue has been resolved
 

gm280

Supreme Mariner
Joined
Jun 26, 2011
Messages
14,604
Okay, what was the "issue"? Answers and solutions always helps others.
 
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