Linkert carburator ventura

[kenny]

I am working on a LINKERT m-35 carb and my question is should the Ventura have a snug fit when removing it or is all fine if it kinda slides out with no resistants. Kenny.

[dukekleman]

Kenny,

It should have a snug fit.

Hope this helps,

Duke Kleman

[T. Cotten]

I am working on a LINKERT m-35 carb and my question is should the Ventura have a snug fit when removing it or is all fine if it kinda slides out with no resistants. Kenny.

It gets kinda iffy, Kenny!

Potmetal venturies are distorting while we are talking about them, much less the last eighty years.
They can be tight in spots, but still show some daylight anyway, so its not about feel. Its how they eyeball up to a light.

DAYLIGHT.jpg


Potmetal (ZAMAK) is a super-cooled liquid, like antique window glass, endlessly moving, and sometimes crystallizing.

After routinely swageing a wide variety of venturies oversize, and lathe-cutting them to a snug-but-assemble-able fit to honed bores,
they invariably returned to a slip fit in a matter of months or a year, however they remained 'round', without daylight.

....Cotten

[kenny]

I will do the light test and hope for the best. And if I see light could a thread locker work to seal it up. ? Just a thought or maybe some thing else could work to get a seal and a snug fit. Thanks for the advice you guys. Kenny.

[T. Cotten]

I will do the light test and hope for the best. And if I see light could a thread locker work to seal it up. ? Just a thought or maybe some thing else could work to get a seal and a snug fit. Thanks for the advice you guys. Kenny.

Loctite green won't work..

GREENGOO.jpg


If there is a threadlocker that is fuel-proof, Kenny,
then you will never get the venturi back out.

Common O-rings don't like modern fuel either,

ORNGVENT.jpg

Oddly, I encountered more than one Schebler like this:

VENTSEAL.jpg
(Copper wire, not Viton, leadpest aside,...)

If somebody is going to that much trouble, they might as well as properly swage and re-cut it.

....Cotten

[dukekleman]

Quote:

Common O-rings don't like modern fuel either,

ORNGVENT.jpg

Modern Viton Fluoroelastomer O-rings were made for todays fuels and work wonderful!

Hope this helps,

Duke Kleman

[T. Cotten]

Modern Viton Fluoroelastomer O-rings were made for todays fuels and work wonderful!

Hope this helps,

Duke Kleman

I had hoped, Duke,

That I had made the distinction between 'common', and the appearance of viton upon the Schebler (the pic made copper look just like it.)

Certainly there's viton for such an application, but how many you gotta buy, and for how much?
(If you are focused upon carbs, you would need three sizes.)

Its more practical to swage them, as either way, they must go on the lathe.

....Cotten

[dukekleman]

I like the growth friendly ability they offer when subjected to the heat found in their surrounding environment. It's offers a more stable fuel calibration over temperature ranges seen on these air cooled V twins.
How I monitor all this starts in my climate controlled Dyno test room. I can later use certain test equipment out on the road as well. Tested and proven over time.

Hope this helps,

Duke Kleman

[T. Cotten]

I like the growth friendly ability they offer when subjected to the heat found in their surrounding environment. It's offers a more stable fuel calibration over temperature ranges seen on these air cooled V twins.
How I monitor all this starts in my climate controlled Dyno test room. I can later use certain test equipment out on the road as well. Tested and proven over time.

Hope this helps,

Duke Kleman

Impressive, Duke!

What does the next generation do when the time comes for service?

At least a swaged venturi will look like the book.

....Cotten
PS:

It's offers a more stable fuel calibration over temperature ranges seen on these air cooled V twins.

Wait Duke,..

You think it will be significantly better than a properly fitted potmetal?

You want to start uploading your data for us all?

I've plenty of experimentals for you to dyno.

[kenny]

Thanks for the information about these linkert carb venturis you guys it is all really interesting. I think I'm gonna get a couple different venturis and see if they fit better. Kenny.

[T. Cotten]

Thanks for the information about these linkert carb venturis you guys it is all really interesting. I think I'm gonna get a couple different venturis and see if they fit better. Kenny.

Before you throw money at it, Kenny,

Please inspect where the throttledisc can rub against the bore and make an 'eyebrow' of wear:

eyebrow.jpg

1½" models suffered the worst. When the groove extends to the idle bleeds, tuning the transition from idle to power circuits gets greatly confused.

If you choose to repair this wear, then you won't know your exact venturi OD 'til its honed clean.

....Cotten