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Stewart Warner 385B-F L Swing 6-12 Fuel Level Sending Unit 240/33 Ohm

Specs
Sold in Quantity:
Each
Bolt Hole Pattern:
5 on 2.20"
Ohm Range:
240 empty, 33 full
MFG. Part #:
385B-F
Overall Length:
12.00
Overall Diameter:
2.61
Notes
Can be shortened to 6.00"
Stewart Warner 385B-F L Swing 6-12 Fuel Level Sending Unit 240/33 Ohm

Click image to enlarge

Details

Reviews (11)

Q & A (5)

What's in the Box

Info

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) 

OHM
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)

Customer Reviews

Rated 4.5 out of 5 by 11 reviewers.
RATING BREAKDOWN
11 reviews
5 Stars
8
4 Stars
2
3 Stars
0
2 Stars
1
1 Star
0
RECOMMEND THIS PRODUCT:

Jerry
Verified Purchaser
Omaha Ne

Sending unit

July 18, 2016
It only requires minor adjustments
Yes, I recommend this product.
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tiger
Verified Purchaser
Verified Reviewer
San Pedro Ca.

just what I needed and worked perfect.

October 20, 2015
Fit the tank and worked perfect.
Yes, I recommend this product.
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jk52chevy
Verified Purchaser
red hill new mexico

gppd price and fast shipping

April 13, 2015
good product and fast shipping good price for stewart warner products
Pros:
  • good product and fast shipping
Yes, I recommend this product.
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Glen1
Homosassa, FL, USA

Difficult to assemble

September 21, 2014
While trying to attach the float arm to the sending unit, I broke the rheostat. The sending arm must be bent at a PERFECT 90 degree bend. And flattened at the bend. very difficult to accomplish. Got it right with the second unit.
No, I would not recommend this product.
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Merchant Response:

Glen1 - Thanks for your review. We appreciate hearing from you. Your review has been passed along to our Customer Service team to review the situation and our QC team to record and inspect the issue with this product. We apologize for your frustration and are always happy to help.
YellowSea2
Verified Purchaser
Lynn Haven, FL, USA

No problems experienced .

September 05, 2014
No problems with installing. It fit the tank perfectly and as to this date is working just as it should.
Yes, I recommend this product.
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Onbrake
Verified Purchaser

Quality

August 16, 2014
Pretty easy to install, the only grey area is the instructions. After a quick study, I made the necessary, mods and presto I'm done.
Pros:
  • Quality
Cons:
  • vague instructions
Yes, I recommend this product.
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moondoggy
Verified Purchaser
Champaign, IL, USA

Perfect replacement

May 03, 2013
FIxed my Stewart Warner Fuel Gauge problem of inaccurate reading. Measured the ohm's on my old one and realized it was out of range (440 ohms) Slipped this one in (easy) and back to correct readings again. Only adjustment was cutting the float rod to correct length.
Pros:
  • Easy Install
Cons:
  • None
Yes, I recommend this product.
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Yesteryears Custom Classics
Verified Purchaser
Glendale AZ

FUEL LEVEL SENDER, 6"-12" LH

December 23, 2011
Fit exactly as the old.
Pros:
  • Durable
Yes, I recommend this product.
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teamcow
Verified Purchaser
topeka, ks

Great......

November 12, 2011
Many applications.......
Pros:
  • Easy To Install
Yes, I recommend this product.
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pedro
derby, ks

installing the sending unit

February 14, 2010
the sending unit interfears with pickup tube on 32 ford poly tank. it will need to be bent before it is cut to length.
Yes, I recommend this product.
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Page 1 of 2

Product Q&A

5 questions : 6 answers

2 answers

my guage reads 40 to 250 ohms--will this sender work replica with classic restoration guage--67 vw tank

dantad
July 27, 2014

my guage reads 40 to 250 ohms--will this sender work replica with classic restoration guage--67 vw tank

Answers

September 22, 2014
Glen1
Not sure. Would not recommend
July 29, 2014
Travisp
The 33-240 sender is as close as we have listed to your 40-250 gauge. If your 250 is empty reading and the sender putting out 240 empty your gauge would never get to empty before you ran out of fuel.
1 answers

does this sender come with a gasket?

jhenry
November 01, 2012

does this sender come with a gasket?

Answers

November 01, 2012
Jason
Yes, a gasket is included
1 answers

Is this 12 volt or 6 volt? and what size hole dose it fit. 2-1/2 or 3 1/2

Jim
Westminster, Md
November 08, 2011

Is this 12 volt or 6 volt? and what size hole dose it fit. 2-1/2 or 3 1/2

Answers

November 09, 2011
John
Part number 665366LP These senders are 12 volt and require a 1 5/8” diameter hole. Mounting flange is approximate 2 ¾” O.D.
1 answers

My fuel tank is 15 inches high. the sender mounts on side of tank exactly half way ie. middle of tank height. Is this unit made to mount on side of tank. current unit has about 12 inch long float. thanks Larry

longplay
June 08, 2015

My fuel tank is 15 inches high. the sender mounts on side of tank exactly half way ie. middle of tank height. Is this unit made to mount on side of tank. current unit has about 12 inch long float. thanks Larry

Answers

June 08, 2015
Eric
Expert
This sender is made to bolt into the top of the tank. The float will extend out at a 90 degree angle at some point throughout the sweep of the sending unit. Sorry we do not offer a sender that is designed to mount to the side of the tank.
1 answers

I have the sender installed in a 10.4 gallon tank used in a 23 T-Bucket. With the tank full the full gauge is only showing 3/4. Is that sender unit issue or a gauge issue?

David
Houston, TX
December 26, 2015

I have the sender installed in a 10.4 gallon tank used in a 23 T-Bucket. With the tank full the full gauge is only showing 3/4. Is that sender unit issue or a gauge issue?

Answers

December 28, 2015
Eric
Expert
It is likely that the float need adjusted in length so that it touches the top of the tank when at the top of the travel and touches the bottom of the tank at the bottom of the travel. Also we offer a fuel gauge interface module 91012910 that will allow you to precisely adjust the empty and full reading on your gauge.
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