Lotus Elan

Fuel sender, resistance range

PostPost by: 1963 S1 » Thu Apr 29, 2021 9:15 pm

I would like to know what the expected ohms resistance range should be for a 1963 Series 1 Elan Smith's fuel sender. Ohms reading at full vs. empty. The Smiths sender which is currently installed is model number: FT 3334 / 50. The fuel gauge is Smiths FG 2530 / 71. Thank you.
IMG_0960e.jpg and
IMG_0963.JPG and
1963 S1
Second Gear
Second Gear
Posts: 76
Joined: 14 Jan 2016
Location: USA

PostPost by: gherlt » Fri Apr 30, 2021 5:13 am

1964 S1 (engine ready, awainting body paint)
1967 S3 DHC (trying to recreate Alex Black's window cable clamp bolt)
1969 S4 FHC (engine worn ... )

Brian Bucklands 2nd edition available ! Look here: https://theelanman.com
Fourth Gear
Fourth Gear
Posts: 603
Joined: 20 Jul 2006
Location: Weiden (DE) & Tarragona (ES)

PostPost by: reds4se » Fri Apr 30, 2021 9:17 am

I found the same sender installed in my S4 tank and the range was from 3 ohms empty to 83 ohms full.
First Gear
First Gear
Posts: 16
Joined: 31 Jan 2009
Location: Leeds

PostPost by: Billmack » Sat May 01, 2021 1:38 pm

If the S1 and S4 have the same sender one of them is likely wrong. Info about this is on this forum somewhere. I saw it recently.
Second Gear
Second Gear
Posts: 145
Joined: 30 Sep 2017
Location: Warren RI

PostPost by: Quart Meg Miles » Fri May 07, 2021 11:09 pm

Late to the party! The FT sender is the correct one for a S1/S2 Elan and nominally is 0 Ohms in empty position and 87 Ohms at full.

I measured my original one, 30 years ago when I fitted a new tank with the later, wrong, sender, and it was less than 5 Ohms empty and between 75 and 80 Ohms at full. My gauge is type FG.

A thread started by nomad "Fuel Gauges ??" 14/01/2015 includes a description by rviani, according to my notes.

26/4088 1965 S1½ Old and scruffy but in perfect working order; the car too.
________________Put your money where your mouse is, click on "Support LotusElan.net" below.
User avatar
Quart Meg Miles
Coveted Fifth Gear
Coveted Fifth Gear
Posts: 1070
Joined: 03 Oct 2012
Location: Barnham, W Sussex, UK

Total Online:

Users browsing this forum: MartinE and 6 guests