fuel gauge works when mep-805b is not running, but when running, shows low fuel.

[scootertrs]

Well, here is my sequence... MEP-805B Generator would not start and panel showed a fault. Arrow was unresponsive in display. after reading several posts (thank you) I developed enough intestinal fortitude to open "pandora's box". After opening and being quite pleased at finding no water within, I continued to investigate and saw one pink wire going to a 2 pin plug had broken off. I repaired that, continued the inspection, seeing nothing else out of place, reassembled it after adding rtv sealant to the cover and de-oxit to the plugs. reinstalled it and now, the arrow moved with the controls.

Attempted to start, no-go... read the manual, held the "fault-clear switch for 2 sec. checked panel and all showed well, including accurate fuel level. genset fired up and ran like a top, generating power without issue, but now my fuel gauge showed no fuel. Momentary jumping of fuel gauge terminals gave me a reading. Any ideas?

What could make the gauge read correct when genset is off and not at all when genset is running?

Thanks for the help.

 

[Guyfang]

Vibrations. Open up the set. Remove the sending unit, and check it out. Also check all your wires and connections.

 

[scootertrs]

Vibrations. Open up the set. Remove the sending unit, and check it out. Also check all your wires and connections.

Will do that in the am... raining right now... and I would not want to get water in the fuel.

thanks

 

[Guyfang]

If you haven't taken the sending unit out yet, use a magic marker, to mark it were it was screwed into the tank. Sometimes a pita to get back in when it's off a hole or two.

Eyeball the slider and coil real good. Sometimes the coil will have a break. All it takes is a arc, and the wire is burnt through.

Dont be suprised if the float is not any longer attached to the switch. Commen problem

 

[scootertrs]

Thanks, will do

 

[scootertrs]

Update... took sending unit off and you were right. seems sending unit is designed to be used in several different fuel tanks and as such, the contact pot is on sliders inside. corrosion had built up within and now after cleaning, works like it was meant to. Thanks again.

 

[Guyfang]

Your welcome. Many, many TQG parts are interchangeable among the TQG fleet.

 

[TNriverjet]

I need to perform this check on my 803a. It either shows full or empty... no rhyme or reason.

 

[Guyfang]

Best place to start is the connections. Then pull the sending unit. This was always a problem with the TQG family.