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SORN
by OldSkrote - 31/07/25 02:07 PM
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Forums34
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Aug 24th, 2023
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Joined: Jun 2012
Posts: 2,142 Likes: 43
Talk Morgan Expert
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Talk Morgan Expert
Joined: Jun 2012
Posts: 2,142 Likes: 43 |
Talking about fuel gauge, mine has started from one day to the other to go down at twice the previous speed, I.e. I’m now back to zero%in less than 200km. A classic evolution ? My M3W is just one year old...
Although the fuel gauge will never be something to be relied upon more consistent readings can be restored, particularly after a period of inactivity, by cleaning the two resistance fine wires inside the transmitter. Remove the transmitter unit and take the small nut off the base of the cover, this will allow the cover to be removed and expose the two fine wires with the float. Carefully clean the two wires with a metal polish or very fine abrasive crocus cloth. Re-assemble and clean the transmitter spade contacts. This seems to restore the random readings to steadier random readings, not great but better.
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Joined: Feb 2018
Posts: 761 Likes: 23
Talk Morgan Regular
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Talk Morgan Regular
Joined: Feb 2018
Posts: 761 Likes: 23 |
Any idea what the ohm range of the sender is? 90-0? 240-33?
Steve
Late 2012 M3W
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Joined: Feb 2016
Posts: 103
L - Learner Plates On
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L - Learner Plates On
Joined: Feb 2016
Posts: 103 |
The resistance range varies at empty depending on the length but are between 60 & 90 ohms at empty to approximately 2 to 5 ohms
250mm is 2.5r +- 1.5 r full 72.r + - 2.5r empty
280mm is 2.5r +- 1.5r full 75.5r +- 2.5r empty
Last edited by Elcyd; 28/04/20 05:14 PM.
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Joined: Feb 2018
Posts: 761 Likes: 23
Talk Morgan Regular
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Talk Morgan Regular
Joined: Feb 2018
Posts: 761 Likes: 23 |
Thanks for that. I was looking at trying a different sender design that may be more reliable in this application. Looks like there are a few options, along with sources for signal converters that expands the possibilities further.
Steve
Late 2012 M3W
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Joined: Feb 2019
Posts: 3,854 Likes: 2
Talk Morgan Addict
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Talk Morgan Addict
Joined: Feb 2019
Posts: 3,854 Likes: 2 |
Thanks for that. I was looking at trying a different sender design that may be more reliable in this application. Looks like there are a few options, along with sources for signal converters that expands the possibilities further. I am all ears. A "signal converter", from what to what? Aside from a dipstick what else can we do?
The light at the end of the tunnel is actually a train. 2019 M3W
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Joined: Feb 2018
Posts: 761 Likes: 23
Talk Morgan Regular
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Talk Morgan Regular
Joined: Feb 2018
Posts: 761 Likes: 23 |
Here is my leading contender thus far. They indicate it is available with custom Ohm ranges, so I've asked for price and availability of a unit with a 75-2.5 range. https://www.hardin-marine.com/p-74416-sfw-fuelwater-level-senders.aspxAnd the signal converter: https://www.speedwaymotors.com/Classic-Instruments-SN34-Fuel-Link-Interface,230181.html
Last edited by Bitsobrits; 29/04/20 02:43 AM.
Steve
Late 2012 M3W
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Joined: Feb 2019
Posts: 3,854 Likes: 2
Talk Morgan Addict
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Talk Morgan Addict
Joined: Feb 2019
Posts: 3,854 Likes: 2 |
If you just change the sender and add an appropriate meter of your choice you could circumvent the buggy Morgan system.
The light at the end of the tunnel is actually a train. 2019 M3W
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Joined: Jul 2013
Posts: 3,660 Likes: 48
Talk Morgan Addict
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Talk Morgan Addict
Joined: Jul 2013
Posts: 3,660 Likes: 48 |
Aside from a dipstick what else can we do?
Fill up, zero the trip meter and fill up when it gets to around 200 miles 
Red Leader 
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Joined: Feb 2019
Posts: 1,876 Likes: 15
Talk Morgan Enthusiast
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Talk Morgan Enthusiast
Joined: Feb 2019
Posts: 1,876 Likes: 15 |
we used to say about the first Goldwings.... "the gauges are for entertainment purposes only"
Rodger
2018 M3W "Dreamers on the Rise"
2004 Plus 8 (wife's)
old Goldwings and a couple of Harleys
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Joined: Aug 2011
Posts: 7,553 Likes: 88
Talk Morgan Guru
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Talk Morgan Guru
Joined: Aug 2011
Posts: 7,553 Likes: 88 |
Aside from a dipstick what else can we do?
Fill up, zero the trip meter and fill up when it gets to around 200 miles The “fill up and zero the trip” is the technique I’ve always used during the 15 years of owning my 4/4.
Bud
4/4 "Stanley"
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