How do I keep contaminants out of my fuel system?

The fuel selector valve works in unscreened fuel. Contaminated fuel can cause selector valve seal damage. When fueling from possibly contaminated fuel sources McFarlane recommends the use of a fuel filter, such as Mr. Funnel or another filtering device, to reduce trash in the fuel system.

I installed a new fuel quantity transmitter and the system is still not working. What is wrong?

There are several other components in the fuel indicating system which could be the issue or are causing the indication problems: Ensure that your aircraft fuel indicating system utilized Stewart Warner style transmitters. Even if your aircraft originally came with that style, there were many Cessna Service Bulletins to replace them with the Rochester style. Our transmitters will not work with those components if they have been changed. This was a very common SB when Cessna switched over to Rochester. Transmitter Identification shows the difference in the Rochester style and the original Stewert Warner transmitter. McFarlane transmitters and Cessna Stewart Warner transmitters have an electrical resistance range of about 32 ohms when in the full position and 250 ohms in the empty position. This can be measured with an ohm meter connected between the wire terminal and the metal body. Note that the gold dichromate corrosion treatment on the zinc plating is a poor conductor. The metal body must be scratched a little to get a good electrical connection. The Rochester transmitter has a much different resistance pattern than the Stewart Warner or McFarlane transmitter. Consult your log books and check the part numbers of the fuel gauges and transmitters. Do not rely on Illustrated Parts Catalog or eligibility. With the age of most of the general aviation fleet, the possibility of corrosion in the wires or grounding is very likely. The gauge (indicator) may not be working correctly or properly calibrated. Since the transmitter gauge system works with very low voltage and very low milliamp electrical flow it is very sensitive to proper grounding and high resistance in electrical connections. Most problems are related to electrical connections. Excess resistance in the transmitter circuit can be detected by measuring the transmitter resistance with the transmitter being installed but without the wire connected at the terminal, and then measuring the resistance at the transmitter wire at the back of the gauge with the transmitter wire connected to the transmitter terminal and the transmitter wire disconnected from the fuel gauge and the other ohm meter connection to a ground at the back of the gauge. The resistance readings should be very close to the first resistance reading. In other words, you are measuring the transmitter resistance first without the airplane circuit and then comparing the reading with the airplane electrical circuit. If the preceding wiring check shows good, the problem is likely in the gauge. The fuel gauge has a brass grounding strap that grounds the internal electrical coils to the gauge case. With years of service this grounding strap can develop a thin layer of corrosion that restricts electrical flow. When this happens the gauge will show more fuel than what is in the tank which is not good! Cleaning this ground strap should fix the problem. Refer to the Cessna service manuals for detailed trouble shooting and maintenance information. Caution! Never short the battery power to the transmitter wire! It will take only seconds before the stainless steel resistance wire in the Cessna transmitter will glow red hot in the fuel tank. The hot wire could explode the tank! Never have power on when trouble shooting the fuel gauging system. Electricity in the Fuel Tank. Is it Safe? Always check the fuel gauge system for proper calibration per the Cessna maintenance instructions.

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Home / Shop Parts / 9812-0023-101

P/N: 9812-0023-101

Name: FUEL LEVEL SENDER
Brand: Instrument Tech
SKU: 9812-0023-101
Availability: BackOrder

FUEL LEVEL SENDER

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Approval	FAA PMA
Condition	New
Manufacturer	Instrument Tech
Dimensions	L: 9.5 x W: 4.5 x H: 3.25 in
Weight	0.5187 lbs
Unit of Measure	Each
Retail Price	$0.000
Your Price	$0.000

Eligible Aircraft

Supersedures

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FAQs

Supersedures

Please verify that this product is eligible for your aircraft before adding it to your cart.

OEM Part Number	McFarlane Part Number	Comment
550-503	9812-0023-101
7740-00040	9812-0023-101
PS10013-5	9812-0023-101

Frequently Asked Questions

Eligible Aircraft

Make	Model	Start S/N	End S/N	Comment	Eligibility Chart
Piper	PA-28-201T	28-7921001	28-7921095	Replacement for PS10013-5, 550-503, 7740-00040	1105
Piper	PA-28R-180	28R-30002	28R-7130013	Replacement for PS10013-5, 550-503, 7740-00040	1105
Piper	PA-28R-201	2837001	2837061	Replacement for PS10013-5, 550-503, 7740-00040	1105
Piper	PA-28R-201	2844001	2844999	Replacement for PS10013-5, 550-503, 7740-00040	1105
Piper	PA-28R-201	28R-7737002	28R-7837317	Replacement for PS10013-5, 550-503, 7740-00040	1105
Piper	PA-28R-201T	2803001	2803012	Replacement for PS10013-5, 550-503, 7740-00040	1105
Piper	PA-28R-201T	28R-7703001	28R-7803373	Replacement for PS10013-5, 550-503, 7740-00040	1105
Piper	PA-34-200	34-7250001	34-7450220	Replacement for PS10013-5, 550-503, 7740-00040	1105
Piper	PA-34-200T	34-7570001	34-8170092	Replacement for PS10013-5, 550-503, 7740-00040	1105
Piper	PA-34-220T	3433001	3433172	Replacement for PS10013-5, 550-503, 7740-00040	1105
Piper	PA-34-220T	3447001	3447029	Replacement for PS10013-5, 550-503, 7740-00040	1105
Piper	PA-34-220T	3448001	3448079	Replacement for PS10013-5, 550-503, 7740-00040	1105
Piper	PA-34-220T	3449001	3449999	Replacement for PS10013-5, 550-503, 7740-00040	1105
Piper	PA-34-220T	34-8133001	34-8633031	Replacement for PS10013-5, 550-503, 7740-00040	1105

Related Categories

Product Details

Fuel Quantity Transmitters for Piper Aircraft

Transmitters by Instrument Tech

Instrument Tech provides FAA-PMA approved fuel quantity transmitters for Piper aircraft.

Direct replacements for the original and difficult to find Rochester and AC units
Designed for use with the original OEM fuel quantity gauge
Do not require any modifications to the fuel system

Note: Gasket included.

WARNING: Cancer and/or Reproductive Harm - www.P65warnings.ca.gov