After continually fiddling with my SU's I've created a fairly inexpensive Sightglass for my carburetor float bowls. My device will allow me to see what the floats are set at and ensure that the carb gross fuel mixture setting is correct. Then I'm able to dial in the fine mixture setting with the adjustment knobs on the nozzle to get back to factory specs.

Would there be interest from any members in a set (allows you to see levels in both carbs at the same time)? I'd be willing to provide 2 sightglasses with instructions for $15 including shipping anywhere in the US. PM me if you're interested and I can provide more detail.

Did you ever see the sight glass on a Double Barrel Datsun 510 Carb? It's a Fish bowl/windshield !!!!!

Have you got a pic of that?

(I know you do... You've got a pic of everything!) :paranoid:

Now here's an interesting one I've never seen before...

Datsun 70 72 240Z Su Carburator Float Bowl Gauge | eBay

Must thread into the drain hole. Pretty nice piece. Overkill, but nice!

Well, I had to test a theory about correct fuel levels.

If the correct measurement is 23mm, and its measured from the inside ceiling of the float bowl cover, not the gasket surface, then just where is 23mm down from there on the float bowl? Is there something on the float bowl or carb body that marks this critical position? Or are we doomed to use little rulers and sharpies and leave unsightly (un-site-glass-ly and shodily placed marks on our polished carb bodies?

So I measured. And looked. Guess what I found.

Taking a picture from Jarvo's post (#13) above, (I doodled a bit on it)

What do you see?

I see that magically 23mm down from the ceiling of the cover (the top of which is 3 mm up from the gasket surface), corresponds exactly to the very top edge of that retangular boss 'thing' on the side of the float bowl.

Just what is that thing for anyway? I'm tempted to scribe my name in it, or mount a site glass in it....

and I see that Jarvo likely marked his 23mm measurement down from the float bowl cover gasket....

Edited June 3, 201311 yr by zKars

Attachment didn't work Jim.

I could not open attachment either, but looking at the pic in post #13, I can see "block" on the side of the float bowl that Jim is alluding to. Will make the alignment much easier and no more marks on side of carb bowls!!

working on it. Silly computers... Try to tell a good story, and you get this.. jeesshh

Edited June 3, 201311 yr by zKars

For all those following the thread, I found this at McMaster Car...

McMaster-Carr

There you go. Take that, you stupid computer....

Nope, now its gone again. Was there, really! Oh well, you got the point I guess

And nice find there Dave at M-C! That place has 5 of EVERYTHING

Is the attachment working for anyone else? I see it now!

Edited June 3, 201311 yr by zKars

No attachment yet Jim.

Hit the old "refresh" button, Jeff, 'F5'.

I can see it fine in a couple of different browsers now.

Got it. Is that really where the 23mm is measured from??? I thought it was from the bottom of the lid just above the gasket, not from the inside of the lid.