Bristol Cars - Owners and Enthusiasts Forum  

Go Back   Bristol Cars - Owners and Enthusiasts Forum > Bristol Forums > 8 & 10 cyl Bristol cars

8 & 10 cyl Bristol cars Type 407 onwards - restoration, repair, maintenance etc

Fuel Tank Float Unit

Thread Tools Search this Thread Display Modes
  #1 (permalink)  
Old 09-07-24, 03:07 PM
Join Date: Jul 2024
Posts: 2
Default Fuel Tank Float Unit

As a NEW Bristol owner I am trying to locate some parts for my fantastic 1970 - 411 Mark 1.
I have a fuel gauge not working which I think will be a faulty Float Unit.
1. Would you agree with the most likely dignosis?
2. Where can I find a replacement unit if required, I believe the part No to be 907-1-33010 (Smiths FT.5301/17
Reply With Quote
  #2 (permalink)  
Old 09-07-24, 03:17 PM
Join Date: Nov 2011
Posts: 32

Holden sell sender units - you would need to adjust the sender for length. Could be the gauge as well of course - you could test if the sender is working by seeing if the voltage to the gauge works when you fill up.
Reply With Quote
  #3 (permalink)  
Old 09-07-24, 03:51 PM
Join Date: Jul 2008
Location: Bury St Edmunds, Suffolk, UK
Posts: 268
Default Fuel gauge / sender unit.

After 25 years of ownership of my Bristol I have got used to what Briam Marelli called a std fuel gauge reading. When I fill up it says full and stays there until half a tank has been consumed and then drops to half. It works well after that. I have a spare tank and fuel sender which I bought about 20 years ago, as one does, just in case, but rather like Alfa Romeos I have got very used to my Bristol's quirks.
I recommend Holdens as well, they understand what you want or need.
Reply With Quote
  #4 (permalink)  
Old 09-07-24, 05:43 PM
Join Date: May 2018
Posts: 80

Contact Graeme Payne at Classic Bristol Car Parts, I am sure he will be able to help. I bought one from him a few months ago.
Reply With Quote
  #5 (permalink)  
Old 10-07-24, 05:56 AM
Join Date: Jul 2021
Posts: 63

You donít describe the symptoms.

Be aware that there were two sorts of fuel gauge- The posh sort, as used by Bristols, which shows the fuel level as soon as you switch the ignition on and the basic sort, as used on eg Morris Minors, where the gauge takes a time to react.

The posh sort will immediately show Full, indeed over Full, if the tank unit has gone open circuit whilst the basic type will show Empty.

So if yours shows full all the time it could be the tank unit or the connection between the gauge or the tank. If it shows empty all the time Iíd suspect the connections to the gauge as while the gauge itself is very clever itís also extremely robust. By the way the gauge has to have both earth and power connections so if it appears to be the problem check both
Reply With Quote
  #6 (permalink)  
Old 10-07-24, 09:26 AM
Join Date: Jul 2024
Posts: 2

Thank you for all your advice.

To Roger, the fuel gauge does not move. car has been in a collection for 12 years so don't know how much it has been driven in that time.

I am going to check the sender unit first, if working will check all wiring to the gauge. may be lucky and its a broken wire (have had a couple of those)
Reply With Quote

Thread Tools Search this Thread
Search this Thread:

Advanced Search
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is Off
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off

All times are GMT. The time now is 02:16 PM.

This is the live site

Search Engine Friendly URLs by vBSEO 3.6.0 PL2