Finally got my 1970 vintage gauge panel complete!

[JimG]

With the addition of my long-lost fuel gauge! Now it looks right!

[mattyboy]

very nice

[Greg Guimond]

Nice! How about a shot of the entire dash layout?

[JimG]

Greg, here is the best shot I have of the full dash... the previous owner installed a stereo (!)...

[Greg Guimond]

Man, a stereo could have easily been hung side mount under the dash out of site. Nice looking dash.

[JimG]

Yep, I would NEVER have done it! But, the rest of the boat was so nice and original that we have endured it! We rarely even turn it on...the music comes out the stern!!

[CHACHI]

Love the H/M sticker on the transom.

Ken

[JimG]

Bringing up an old thread... I am trying to get my new old fuel gauge working. I cannot find a wiring diagram for it, (it is an ancient steel-cased Teleflex with only two studs and no light.) I have no idea if I have the correct sender.

Does the tank have to be grounded to the panel? The wire is there, but does not seem to have any effect.

If anyone has an original panel like above, could you take a peek for me? Thanks!!!

[mattyboy]

Jim
my old stewart warners were 2 lug usually the new stuff is 3 lug I G and S Ignition Ground and Sender on a two lug they are I and S and the ground is picked up by the case thru the panel

either way the ground on the boat should be common to the tank ,panel and engine block the tank ground should also be run up to the collar of the fuel fill

I will see if I have the two lug gauges to see if they help


also some of the older HM setups worked on lower voltage there was a voltage regulator on the panel does your panel have that?

[mattyboy]

Jim

couldn't find the gauges just the brackets. you need 12 volts and a ground at the gauge and a ground for the sender at the tank. the gauge is a current meter and reads the current thru a variable resistance to ground.

on the gauge if it is grounded and you put 12 volts on the Ignition lug then ground the sender lead any gauge should peg .


here is the bracket on a two lug gauge the SW use the connection lugs as the mounting lugs as well not sure if the teleflex do that

you see the lugs are isolated from the bracket ground the bracket has a spring leg on the side to ground the case and the end of the bracket has teeth to dig into the panel and pick up the panel ground

[mattyboy]

Jim

this is what I have on the HM panel

remember most of the early classics had no electric fuel gauges they were site glasses


hope this helps

[JimG]

Matty, there was a voltage regulator on the oil pressure gauge only. I removed it. No vr on the fuel gauge. Oh and I think the fuel gauge was standard by 1970 on the 18.

[mattyboy]

ok

the sender in the tank sends current to ground thru a varister ( changing ohm reading that must match the gauge) and usually the tank is grounded

so as resistance to ground decreases the current increases making the gauge move

I would connect the ground at the tank and see what happens

also thinking about it if the gauge has no light in it it doesn't really need a ground , my old SW gauges had slits in the case that would backlight the gauge so there was a light bulb near the gauge and would pickup the light thru the slit in the case . so you just need 12v on one lug and a matching sender connected to ground on the other.

[mattyboy]

the section on fuel systems in this manual explain how to test the gauge and the sender, the specs may be different on the older gauge but today the 240 ohm empty 33 ohm full is pretty standard

http://www.jamestowndistributors.com..._Reference.pdf

[boatnut]

Jim, we have exactly the same panel and gauges on our '69 H&M 18. I just disconnected the gauge wires at the tank sending unit and I believe one side of the gauge is 12V (ign) and the other side runs to the sending unit. There is also a ground wire on one of the sending unit mount screws grounding the tank. So the result is the gauge gets to ground through the variable resistor in the sending unit. When I get back to the boat I will confirm this. I want to replace the amp gauge with a voltmeter, much more information and I do not want to run charging current all the way to the dash and through the amp gauge and back. I assumed this style of Teleflex gauges were not available anymore -- do you know of any sources? We will likely just go with a non-matching voltmeter gauge for now. My '67 18 had a sight meter and the 69 has a fuel gauge so the transition was in that timeframe.