Linkert carb leaking out of air cleaner

[james]

Help
52 stock pan with linkert 74 carb leaks gas from air cleaner when you straighten up bike off of kick stand.
After carb restoration with new style Cotten float set to 1/4" and checking needle and seat for holding suction everything was fine sitting on kick stand at least for a while.
Yesterday straightened up bike off of kick stand to move it gas spilled out of air cleaner.
The tank shut off does not shut off 100%. Im sure this is part of the problem but you would think the needle, seat and float should take care of the rest.
Is there another setting to use for the Cotten float and how in the world do you get that 1/16" offset adjustment? How can you even see 1/16"?
Maybe it's something to do with atmospheric pressure, there is a full moon.

Thanks, Jim

[Kuda]

Dollars to donuts the float isn't offset enough and it's rubbing on the bowl or the carb stem. Pull the bowl, loosen the mounting screw and nudge the float over to the left (looking down into the bowl) a tiny bit. Yeah, 1/16" is a bit tricky to measure but if worse comes to worse you can just use good old fashioned trial and error. If it doesn't leak, you've got it...

-Kuda
'49 panchop

[james]

Dollars to donuts the float isn't offset enough and it's rubbing on the bowl or the carb stem. Pull the bowl, loosen the mounting screw and nudge the float over to the left (looking down into the bowl) a tiny bit. Yeah, 1/16" is a bit tricky to measure but if worse comes to worse you can just use good old fashioned trial and error. If it doesn't leak, you've got it...

-Kuda
'49 panchop

Thanks Kuda
Im going to need a carb zipper soon.
What's a dollars to donuts anyway?

Jim

[Cotten]

The float can be offset as far as the slop on the pivot pin will allow without rubbing the bowl. Often there is extreme wear on the pin, lever bore, and even the lever fingers if a heavy brass float had been used for a significant period of time.

Another possibility for a leaky valves are rubber-tipped needles deteriorated by modern fuel.

But even with a decent valve, the petcock must still do its job when the machine is not in service!

....Cotten
"Dollars to doughnuts" used to mean about ten-to-one odds on a bet.
I haven't bought a doughnut in years, but I bet the odds are getting even.

[james]

The float can be offset as far as the slop on the pivot pin will allow without rubbing the bowl. Often there is extreme wear on the pin, lever bore, and even the lever fingers if a heavy brass float had been used for a significant period of time.

Another possibility for a leaky valves are rubber-tipped needles deteriorated by modern fuel.

But even with a decent valve, the petcock must still do its job when the machine is not in service!

....Cotten
"Dollars to doughnuts" used to mean about ten-to-one odds on a bet.
I haven't bought a doughnut in years, but I bet the odds are getting even.

Thanks Cotten
Do not have a rubber (viton) tipped needle.
Does your float get set to 1/4" like the book says?
The float pin looks good, the finger shows some wear I would call normal.
Only an occasional drip comes out of the fuel line with the tank shut off.
I'll take it off tonight and go over it again.
Looking at the picture you sent, move the float to the left, correct?

Thanks, Jim

[Cotten]

Jim!

Yes, it is to the left when the valve is pointed away from you;

And yes, your DURABLE is to be set at book spec of 1/4"...
Accuracy of the setting is secondary to being level in the bowl.

(I hope to debut an ultra-light Linkert 'performance' model at the Davenport Meet which will allow for more bowl reserve volume with a higher setting.)

....Cotten

[james]

Jim!

Yes, it is to the left when the valve is pointed away from you;

And yes, your DURABLE is to be set at book spec of 1/4"...
Accuracy of the setting is secondary to being level in the bowl.

(I hope to debut an ultra-light Linkert 'performance' model at the Davenport Meet which will allow for more bowl reserve volume with a higher setting.)

....Cotten

Gathered everyones advise, patiently worked on the float, installed "Peek" manifold seals and all is good so far.
Starts on second kick cold. not bad
Thanks to everyone for the on-going tips.
I keep learning

[NightShift]

I keep learning

So do we all, James, so do we all.

Respectful,

[james]

After going round and round with this carb problem with gas leaking out the air cleaner when I straighten up the bike, I installed a new needle and seat from Old Dude along with a new float lever. I installed them on saturday and checked sunday, monday and today, no gas pouring out of air cleaner. Now instead of 2 kicks to start it takes 4. Guess that leaky gas was like a primer.

Thanks for all your help with this
Jim

[mbskeam]

Now instead of 2 kicks to start it takes 4.

how many cold prime kicks? 3?

then a ign on? 1?=4 right on then...

[Panacea]

Back when Kirk was still around he told of his idea of the correct way to kick start a pan, instead of starting the kick from as high as possible after finding compression, and jumping on the pedal for all yer worth, Kirk suggested starting the kick at no higher than the 9:00 or horizontal kicker height. I tried it that way and have found she starts up with minimal effort. I would have thought, especially with my lighter than stock stroker wheels, I'd need every bit of kicker travel available,...wrong again. Mike

[james]

Usually 2 cold full choke kicks then ign on, part throttle, retard spark, choke open then 2 more kicks. Actually it started better when the carb was leaking....jim