Manky Monkey Motors

I'm just doing some forward planning and hope someone has the knowhow to help. I have a moto guzzi California petrol tank which has a low level fuel sensor fitted, I also have a set of Suzuki clocks which incorporates a fuel gauge, is there any way I can link the two together to give me a reading of how much fuel is in the tank.

the low level sensor in my car is on a separate circuit. Switched live feed to both then both run to earth. Low level is an indicator light on the dash, presume as it drops it makes a contact and on comes the light. The fuel gauge is a separate instrument from the gauge to the sender unit. You could rig a simple circuit and see how it responds to different levels. 

Think the low level sensor will be a make or break switch of some form, so not much use with a fuel gauge which requires a variable impedance.

That's a very sore subject with me Merv. After spending a considerable amount of time calibrating a fuel gauge to the sender unit, I stupidly decided to just tweek one of the ends of the bi-metal strip...... you know just to make it perfect like ::) and after that the bloody thing was totally buggered, this was the result after some further technical adjustment ;D ;D

(http://i390.photobucket.com/albums/oo343/PDSheridan/2015-11-21%2012.53.41_zps9n0nqdlx.jpg) (http://s390.photobucket.com/user/PDSheridan/media/2015-11-21%2012.53.41_zps9n0nqdlx.jpg.html)

 ;D A man after my own heart! People rarely wind me up, mainly cos I don't particularly care what anyone thinks, but inanimate objects do it every time. The only time I swear is when I'm alone in a garage.

Sorry for your mishap Mendalot,

So, the only way to get the fuel gauge to work would be to fit a sender unit to the tank. To be honest I thought this would be the case I was just hoping,
What would be a good and simple sender unit to try and fit because I cant get rid of the gauge as it is integral to the clocks

Have a look at the Car Builder Solutions website Merv. They do several "pole type" sender units, (where the float slides up & down a vertical pole, rather than swinging through an arc on a pivot). They say they're fully adjustable so you should be able to calibrate it to your gauge. They also sell a fuel gauge matching unit, which appears to be an electronic unit that alters the resistance so your gauge reads correctly.

Thanks for that, I'll take a look, I was going to buy a cheap tank with a fuel sender and cut it out and try to fit it to my tank. What you suggest sounds like the easier option

Okay I did what manky suggested and had a look at pole type sender units and this seems like the best way to go. You can buy a fuel gauge    electronic matching unit to help calibrate it to the fuel gauge but apparently these run hot which I don't like the sound of. So the question is does any one know how I can get the Suzuki fuel gauge to read right without one. Because reading about ohms and resistance is way beyond me and makes my head hurt

Shame about that mendalot, hammer fell off the shelf and hit it? After you'd spent all that time fixing it too...

Okay I have looked at a fuel pole sender unit and the one I have looked at operates between 0-180 ohm 0 being empty and 180 being full on the fuel gauge
So the question is what would be the range of ohms on the Suzuki fuel gauge or do the japs make the fuel gauge work a different way

You don't say what Suzuki the gauges come from.
Search the net for info on your model as they will vary. On a quick search this is what I found.
2000s Hayabusa = 10 empty - 130 full
1980s GS1100   = 110 empty - 10 full