GAS Gauge (How to check Fuel Gauge is working?) 97 SPX

[Johnson8537]

How to gas Gauge testing.??

I have a 97 SPX and my gague does not work and then all teh sudden it will start to work usually 3/4 to 1/3 a tank it starts working. Otherwise it shows BONE DRY!!

I checked the connections and they all look good.

The two pink wires that some off the float (sending unit) and the connector before it goes into the hood of the ski. (The low Oil light does work because it came on when the oil was low.)


If i disconnect the clip and go the the gauge side i should be able to use a jumper wire to make the gauge go up correct?

Second where are the fuses located on these skis? (I have not yet checked them)

 

[kustomkarl]

You need to check the Pink and Pink/Black wire coming out of the baffle tube in the gas tank. The sending unit works off resistance. Pull the plug apart at the tank, and use an ohm meter to check for resistance between the two pink wires. The resistance will be different depending on how much fuel is in the fuel tank. If you get no resistance, remove the clamps off the sender, and pull the sending unit out of the fuel tank. Check the magnets on the float in the sending unit. To get to the float out, pop the bottom off and look for the 4 magnets on the float. If they are missing use a strong magnet to get them out of the tank bottom. If they are dirty clean them and re-insert it back in the baffle tube and check the wires again to check for readings of resistance depending on where the float is in the baffle tube. Check the float to see if it “floats” in a cup of gas. Sometimes the float becomes saturated and won’t float in gas…but it will in water, so use gas to check it. If still no reading of resistance replace the sender. If you get readings, check continuity of wiring to gauge. At the baffle you could un plug the guage and using a jumper wire between the 2 wires in the plug on the guage side. Attach the lanyard to power up the gauges. If the guage goes to full the guage is good. If it still doesn’t respond, do a continuity test of the wires to the guage. If all wiring checks out ok, and the guage still doesn’t respond, the gauge is bad. Keep me posted on your progress.
The fuses are in the front box and the rear box.
Karl

 

[Johnson8537]

You need to check the Pink and Pink/Black wire coming out of the baffle tube in the gas tank. The sending unit works off resistance. Pull the plug apart at the tank, and use an ohm meter to check for resistance between the two pink wires. The resistance will be different depending on how much fuel is in the fuel tank. If you get no resistance, remove the clamps off the sender, and pull the sending unit out of the fuel tank. Check the magnets on the float in the sending unit. To get to the float out, pop the bottom off and look for the 4 magnets on the float. If they are missing use a strong magnet to get them out of the tank bottom. If they are dirty clean them and re-insert it back in the baffle tube and check the wires again to check for readings of resistance depending on where the float is in the baffle tube. Check the float to see if it “floats” in a cup of gas. Sometimes the float becomes saturated and won’t float in gas…but it will in water, so use gas to check it. If still no reading of resistance replace the sender. If you get readings, check continuity of wiring to gauge. At the baffle you could un plug the guage and using a jumper wire between the 2 wires in the plug on the guage side. Attach the lanyard to power up the gauges. If the guage goes to full the guage is good. If it still doesn’t respond, do a continuity test of the wires to the guage. If all wiring checks out ok, and the guage still doesn’t respond, the gauge is bad. Keep me posted on your progress.
The fuses are in the front box and the rear box.
Karl

Ok... I bypassed the Ohm Section because my Ohm meter is MIA...

I will check that when i get it back.. do you know what reading i should see on a full tank of fuel???

I jumped the wires as if they were connected together on the plug that is on the Guage side. I connected the lanyard and got nothing on the guage..

I will Check the fuses.. do you know where the gas gauge fuse it located??

 

[kustomkarl]

Check the box in the front compartment, or the other box by the engine...
This test is very accurate and can't get screwed up unless you are using a ohm meter wrong.

Karl

 

[Johnson8537]

Check the box in the front compartment, or the other box by the engine...
This test is very accurate and can't get screwed up unless you are using a ohm meter wrong.

Karl

OK i will check that....

Today the gague is working (but incorrectly ) It is FULL and reading about 1/4 to 1/3 of a tank.

So can i juct go straight the to Float and see if it is Fuel Logged? While in there Test the resistance on the baffle?

Can I assume the Gauge is working since it is showing fuel..???

Thanks
Chad

 

[Johnson8537]

Ok... I bypassed the Ohm Section because my Ohm meter is MIA...

I will check that when i get it back.. do you know what reading i should see on a full tank of fuel???

I jumped the wires as if they were connected together on the plug that is on the Guage side. I connected the lanyard and got nothing on the guage..

I will Check the fuses.. do you know where the gas gauge fuse it located??

I got my Ohm Meter back and checked the wires.... AT a FULL TANK of GAS the ohm meter is showing no resistance ( Just like connecting both leads of the OHM meter together).... But When i Jump the Wires on the plug side of the fuel gauge it does not respond.

I checked the wires from the sending unit to the plug and they are good (Show no resistance)!!

So...
My question is:
At a full tank does the baffel send NO resistance and them as the tank has less fuel resistance increases?

My Gauge works sometimes but doesn't respond when jumped...

Do i have both a bad gauge and bad sending unit???

 

[RX951]

http://www.seadooforum.com/showthread.php?t=5826&highlight=fuel+baffle+repair

 

[Johnson8537]

http://www.seadooforum.com/showthread.php?t=5826&highlight=fuel+baffle+repair

nice write up... if my baffle is bad i will look into that.... Look straight forward...

Am I to have resistance on a full tank of fuel?

 

[Johnson8537]

I got my Ohm Meter back and checked the wires.... AT a FULL TANK of GAS the ohm meter is showing no resistance ( Just like connecting both leads of the OHM meter together).... But When i Jump the Wires on the plug side of the fuel gauge it does not respond.

I checked the wires from the sending unit to the plug and they are good (Show no resistance)!!

So...
My question is:
At a full tank does the baffel send NO resistance and them as the tank has less fuel resistance increases?

My Gauge works sometimes but doesn't respond when jumped...

Do i have both a bad gauge and bad sending unit???

anyone??? I don't want to tear the baffle apart if I don't have to.

 

[Johnson8537]

So I am showing "0" Ohm on a full tank of gas. I have not pulled the sending unit yet... Am i getting the correct reading??

Also if i use a jumper wire to bridge the connection to the gauge side of the plug and get no responce on the fuel gauge is it bad??

Sorry to repeat the same question but i never got an answer.

 

[DonalMW]

Sorry to invade the thread here..

My 99 Speedster's gauge isn't working either, and before I do a big strip down of the sensor I see that kustomkarl mentioned fuses in the front??
I've never seen them in my boat, or are there any upfront in a 99 speedster??