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Founder, 1929-2014
Speedy Bill
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Stewart Warner 284M Heavy Duty Fuel Level Gauge, Electric, 2-1/16 Inch

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Requires 1/8" NPT sender.
Stewart Warner 284M Heavy Duty Fuel Level Gauge, Electric, 2-1/16 Inch

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Q & A

What's in the Box

Stewart Warner Heavy Duty Series gauges feature bold white graphics on black face, 90° sweep dials with white pointers. The black raised bezel has a distinctive brushed bright rim and the patented 12 volt light ring provides excellent night-time visibility.

  • Gauge Size (mm): 52.40mm diameter
  • Sweep: 90 degree sweep
  • Sender Ohm Range: 240 ohms empty, 33 ohms full
  • Gauge Face Color: Black
  • Gauge Number Color: White
  • Pointer Color: White
  • Bezel Finish: Black
  • Liquid-Filled: No
  • Sending Unit Included: No
  • Sending Unit: Electrical
  • Gauge Series: Analog
Note: This gauge requires a sender with a rating of 240 OHM empty and 33 OHM full (sold separately).


Item Details

Requires sender (sold separately)

You may also be interested in:

Fuel Gauge Interface Module
(Part #91012910)
                        Fuel level gauges are designed to work with  specific sending units that vary from one automobile or gauge  manufacturer to another. Some increase resistance from Empty to Full,  while others decrease as the level goes up. For a builder updating their  vehicle with new gauges, this presents a problem in that the  aftermarket gauges must match the sending unit located in the tank. This  module will allow you to use your stock sender with any fuel gauge. You  no longer have to remove the tank to add a separate sending unit or  modify the sending unit that comes with a aftermarket gauge set.
  • Simply wires in-line between your gauge and existing sender
  • Allows you to use your stock sender with any fuel gauge
  • No need to remove the tank to add a separate sending unit
Learn more about selecting the proper fuel sending unit by reading our tech article, Fuel Sending Units
Stewart Warner 385B-F L Swing 6-12 Fuel Level Sending Unit 240/33 Ohm
(Part #665385B)

Choosing a fuel level sender:

What brand of gauge will you use?
Speedway carries the excellent Stewart Warner brand of fuel senders. They are compatible with all Stewart Warner and Classic Instruments fuel gauges.

How deep is your tank?
Measure the depth of your tank where the fuel sender arm will be located. Choose the sender with an operating range which includes that dimension.

Right or left-swing arm?
Most fuel gauge senders attach with a 5-screw pattern. 2 of these screws are farther apart than the other 3. Position yourself such that the 2 wider-spaced holes are closest to your chest; a right side sender will have the arm (or "float") extending to your right, and a left side sender will have the arm extending to your left. This only matters when replacing an existing sender. A first-time installation can use either one, just drill the mounting holes accordingly.

LH/RH Swing Guide (Link) 

The OEM’s used several different resistance ranges for fuel level indication over the years. However, some of the aftermarket gauge manufacturers follow the common Stewart Warner values (240 ohm empty – 33 ohm full). The gauges and senders that we carry (385 & 391’s) use these standard Stewart Warner values.

Ohms Chart (GIF)

Stewart Warner 366LP-F Fuel Level Sender Installation Kits
(Part #665366LP)

Four mounting holes are used to attach the plate to your tank. Or it can be welded, soldered, or fiberglassed to your tank.

Includes new sending unit gasket and five screws and lock washers. Steel construction.