Stewart Warner 391B-F R Swing 10-15 Fuel Level Sending Unit-240/33 Ohm
Stewart Warner 391B-F R Swing 10-15 Fuel Level Sending Unit-240/33 Ohm
Stewart Warner

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#665391B

Stewart Warner 391B-F R Swing 10-15 Fuel Level Sending Unit-240/33 Ohm

  • Compatible with all Stewart Warner and Classic Instruments fuel gauges
  • Ohm range is 240 empty, 33 full
  • Fully adjustable height
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Arm Swing Side:

Right Side Arm

Left Side Arm

$50.99

/each

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Product Summary

Universal Fit, 15" Overall Length, Height Adjustable

  • Compatible with all Stewart Warner and Classic Instruments fuel gauges
  • Ohm range is 240 empty, 33 full
  • Fully adjustable height
  • Requires a 1-7/16" hole in the tank for minimum/maximum of 1-5/8"
  • Mounts using a 5-screw pattern
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Key Specs

MFG. Part #391B-F
BrandStewart Warner
Overall Length15"
Ohm Range240 ohms empty, 33 ohms full
Height AdjustableYes
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Stewart Warner 391B-F Details

What brand of gauge will you use?
This Stewart Warner brand fuel sender is 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. Two of these screws are farther apart than the other three. 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.

OHM
The OEMs 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.

Item Details

Requires a 1-7/16" hole in the tank for minimum/maximum of 1-5/8".

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Stewart Warner 391B-F Specifications

KEY SPECS
MFG. Part #391B-F
BrandStewart Warner
Overall Length15"
Ohm Range240 ohms empty, 33 ohms full
Height AdjustableYes
GENERAL
Bolt Hole PatternSAE 5 hole (2.125 in. bolt circle)
Sold in QuantityEach

Ratings & Reviews

4.7

7 Reviews

Overall Assessment

Customers praised the product, confirming its perfect fit in old Chevy gas tanks, including '84s with dual tanks, and ease of installation, noting a flawless interface with Stewart Warner gauges. Users appreciated the accurate and smooth tracking of fuel levels, indicating the sender's reliable and linear readouts. The product also demonstrated high quality and practicality with users expressing a strong willingness to repurchase. Forget running out of gas; the sender ensures a smooth ride every time thanks to its definite and consistent performance. Other customers found the product's instructions clear and helpful, though a template for drilling and tapping holes would add to its installation ease.

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4.7

7 reviews

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I would buy this item again

5.0

2 years ago

Dr B

Kerrville, TX

Verified

Perfect fit, easy to understand instructions, and quick delivery.

Would Recommend

fixing old chevy p/u when gas guage goes out.

5.0

9 years ago

none

Center, Texas

Verified

You need to ntify world that your sending unit fits perfectly into old chevy gas tanks. You have to replace gas guage and sending units. resistance on sending unit is different. You can use the old float. Mine is a "84 p/u with dual tanks. I just luck out in finding it. Thanks I've told my friends what to do if theirs goes out.

Would Recommend

Fuel level sender ..... perfect

5.0

9 years ago

Bantam Street Rodder

Butler, PA

Verified

I bought Stewart Warner gauges years ago when they were based in Lancaster, Pa. Recently, got back on the project and discovered I did not have the fuel tank sender. It had an unusual resistance range (ohms) according to the SW instructions. Luckily Speedway Motors had the exact sender I needed to fit in my custom made tank. Testing on a 12 volt battery the tracking was smooth on the gas gauge on the dash and the tracking was linear. Would hate to run out of gas cruising with my wife in a Sunday afternoon!

Would Recommend

I would buy this part again

4.0

10 years ago

Sid

oregon

Verified

I checked the sender before installing and it checked out as advertise

Would Recommend

Fantastic product, works great, great personal.

5.0

10 years ago

Jerchopit

Pinehurst Tx.

Verified

Now I wont run out of gas.easy to install,nothing bad about this product.

Would Recommend

great product

5.0

12 years ago

Junkman55

Easton, MD 21601, USA

Verified

Great product, great company. Parts were shipped fast hope to do more business with Speedway.

Would Recommend

Nice unit, good instructions

4.0

16 years ago

Link X

St Paul,MN

Verified

esy to install but I could have used a templet to mark the holes for drilling & tapping for the screws. Looks like a good unit, I havent hooked it up yet but did install in my tank.

Would Recommend

Showing 7 of 7 reviews

Questions & Answers

5 Questions • 6 Answers

I have a 1977 Jeep CJ7, can this set up be used with a matching Fuel Gauge instead of the Jeep gauges that are on the speedometer?

by Lou

• 9 years ago

1 answer

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I have a 1976 excalibur with a 30 gal tank which is about 12 inches deep,will this sender as i also have a sw gauge ?

by Hank

• 10 years ago

1 answer

View Answer

I have a 1957 VW beetle that does not have a gas gauge. Could I use this and would this work and if so can I purchase a universal gauge to go with it? Also the tank has a shallow end first near the fuel cap and then it goes down to the deep end on the other side. Thank you

by dancer

• 10 years ago

1 answer

View Answer

can I purchase only the arm and float portion of this unit?

by Fanugao

• 11 years ago

1 answer

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WHAT OHMS IS THIS SENDER

by

• 15 years ago

2 answers

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