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Wales
by Joske Vermeule, September 1
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Forums39
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Jun 14th, 2026
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Joined: Nov 2015
Posts: 8,682 Likes: 493
Just barreling along Needs to Get Out More!
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Just barreling along Needs to Get Out More!
Joined: Nov 2015
Posts: 8,682 Likes: 493 |
Thanks for the continued advice from everyone - I used a circuit tester and there is definitely power getting to the fuel tank (the led was flickering, so I'm assuming this is what the flickering from 10v to 0v indicates) - would I find the regulator in close proximity to the petrol gauge.
As the gauge does move (albeit, always to 1/3 full) the uneducated me is going to suggest that it's the sender that needs to be replaced
Got my first ever Morgan Car meet-up tomorrow - so excited ! . Dai,. A length of bamboo is a lot more reliable.
 Ah, bit is it E10 compliant and ethanol resistant ? 
Jon M
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Joined: Feb 2019
Posts: 318 Likes: 5
Learner Plates Off!
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Learner Plates Off!
Joined: Feb 2019
Posts: 318 Likes: 5 |
Thanks for the continued advice from everyone - I used a circuit tester and there is definitely power getting to the fuel tank (the led was flickering, so I'm assuming this is what the flickering from 10v to 0v indicates) - would I find the regulator in close proximity to the petrol gauge.
As the gauge does move (albeit, always to 1/3 full) the uneducated me is going to suggest that it's the sender that needs to be replaced
Got my first ever Morgan Car meet-up tomorrow - so excited ! It's the gauge that requires the regulated 10 volts so it will always be located close by. An old moving coil analogue multimeter is best to assess the output from an OE electro-mechanical regulator. How I wish I'd kept my old Avo 8!
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Joined: Feb 2013
Posts: 515 Likes: 58
Talk Morgan Regular
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Talk Morgan Regular
Joined: Feb 2013
Posts: 515 Likes: 58 |
I had one of those !!!!!!
David Byrne
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Joined: Jul 2018
Posts: 31
Just Getting Started
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Just Getting Started
Joined: Jul 2018
Posts: 31 |
When I rebuilt my ‘69 4/4 the fuel gauge always read 1/4 full. I took the fuel sender out of the tank and it was obvious that the arm between the sender and the float had seized up. Application of WD40 to the pivot and gentle load on the float end of the arm soon had it freed off. The gauge now works over its full range. It is of course only an indication that there is fuel in the tank, always best to fill it well before it gets to the empty mark..
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Joined: Feb 2016
Posts: 8,680 Likes: 413
Needs to Get Out More!
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Needs to Get Out More!
Joined: Feb 2016
Posts: 8,680 Likes: 413 |
I had one of those !!!!!!
David Byrne I have three having caught the reconditioning bug  ![[Linked Image]](https://i.imgur.com/UpaMgoM.jpg) This is my very similar AVO 9 but with international markings and measuring up to 3kV. They would need to be sold at £1000 + now if still made, to match production costs given accuracy and complexity of construction. Note mirror behind pointer to allow parallax correction.
Richard
2018 Roadster 3.7
1966 Land Rover S2a 88
2024 Royal Enfield Guerrilla 450
1945 Guzzi Airone
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Joined: Jul 2007
Posts: 28,901 Likes: 352
Salty Sea Dog Member of the Inner Circle
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Salty Sea Dog Member of the Inner Circle
Joined: Jul 2007
Posts: 28,901 Likes: 352 |
Good man.
I have an AVO8 rescued from work some time before they made me redundant. They didn't ask for it back.
Graham (G4FUJ)
Sold L44FOR 4/4 Giallo Fly
'11 MINI Countryman Cooper D All4
'90 LR 90 SW
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Joined: Aug 2010
Posts: 5,465 Likes: 171
Charter Member
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Charter Member
Joined: Aug 2010
Posts: 5,465 Likes: 171 |
One of the things I wish I still had access to. When I first started work at Plessey Communications in 1980 we had a selection of AVOs and Fluke DVMs in the lab. The AVOs were the most heavily used.
Paul
Costock, UK
Plus Four 75th - Furka Rouge - Pip
Disco 5
Teddy - 17h1 Irish Draught cross
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Joined: Jan 2021
Posts: 150
L - Learner Plates On
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L - Learner Plates On
Joined: Jan 2021
Posts: 150 |
One of the things I wish I still had access to. When I first started work at Plessey Communications in 1980 we had a selection of AVOs and Fluke DVMs in the lab. The AVOs were the most heavily used. I was at Ferranti in the eighties and remember the excitement when we got a Fluke DVM … revolutionary!
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Joined: Jul 2007
Posts: 28,901 Likes: 352
Salty Sea Dog Member of the Inner Circle
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Salty Sea Dog Member of the Inner Circle
Joined: Jul 2007
Posts: 28,901 Likes: 352 |
I have a number of test meters (and other equipment), including a Fluke. 
Graham (G4FUJ)
Sold L44FOR 4/4 Giallo Fly
'11 MINI Countryman Cooper D All4
'90 LR 90 SW
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Joined: Apr 2021
Posts: 159
L - Learner Plates On
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OP
L - Learner Plates On
Joined: Apr 2021
Posts: 159 |
I think I found the issue - your suggestions on shorting the connectors made it pretty clear that the problem probably lay in the fuel tank Here's what I found, looks like the float deteriorated and fell off the sender unit - any recommendations as to where to get a replacement (float or entire unit) I'm assuming these are specific to Morgans or can I use a universal fuel sender ? The tank appears to be around 8 inches (22 cms deep) For example, would there be any issues using this float the dimensions seem correct I could go for the one listed on Morgan Spares of New England, but I've exhausted my budget for the Morgan so I'm trying to do a better job keeping costs under control Cheers, Rob
Last edited by DaiBach; 14/02/22 04:34 AM.
1974 4/4 2 seater
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