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C-210 Fuel Gage

2001-09-04 20:42:20

C-210 Fuel Gage

<HTML>I have a 1961 C-210 and when I operate the aircraft on the left fuel tank the gage will go from a full tank to reading only a quarter tank within 30 minutes of flight time. If I switch tanks, the gage will eventually come back up and show a correct reading. The same happens if I land and shut off the aircraft, the gage will indicate a correct reading. Am I getting a vapor lock? Any ideas?</HTML>

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2001-09-05 02:45:59

Re: C-210 Fuel Gage

<HTML>I have a 1962 C-210B. I have a similar problem as well. My left tank guage does the same thing. Also, after 30 min of flight they bounce around from quarter to full. I trust only my strict timing of engine on as my guage. I would be interested in replies to this posting as well.</HTML>

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2001-09-05 11:42:05

Re: C-210 Fuel Gage

<HTML>I suspect youre fuel quantity transmitter is"sticking".These transmitters are designed with a wire-wound flat rehostat with a moving contact that brushes the flat portion of the resistor,the moveable portion is directly(electrically)connected to youre guage,as these units wear,friction sets in,and binding will occur.The fuel level in the tank(under new unit conditions)is able to overcome the friction of the resistor,and function normally,however as age sets in,the rehostat coil becomes worn,and the slider will actually"stick"at certain points.Sometimes this will be at the top(since most aircraft are topped off after flight,and remain full for weeks sometimes)but it can encounter friction anywhere across the scale from full to empty.The only real cure is replacement of the Fuel Quantity Transmitter in question,however removal,and inspection for full travel range of the arm,and visual inspection of the float will tell you what needs to be done further.This can be checked electrically with a good digital OHM meter,but MUST be off the aircraft.Proper Transmitter grounding is also essential for a proper reading.</HTML>