95 SPXfuel guage not working

[speedbump]

I have a 95 SPX, fuel gauge does not register. have checked fuses and all are OK. have heard it could be a nonboyant float or electrical prob with the sending unit or gauge itsself. how do you test either of these?

 

[nswillin]

You can test easily with a meter. Unplug the baffle switch and remove the baffle. Using a multimeter, set it to ohms and measure its resistance while tipping it up and down slowly. The number should change as the float moves up or down within the baffle.

 

[speedbump]

so if the #'s change on the ohm meter the sending unit electricals are OK but the float could be considered bad. do you then remove the float and test that for bouyancy?

 

[kustomkarl]

Here is the proper way to check the sfuel guage and sending unit. 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. 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.

Karl

 

[JPX]

Come on by this thread for more on this topic http://www.seadooforum.com/showthread.php?t=5586