Stromberg Carburetor Overview

[blakecarl]

I discovered an informative reference on Stromberg carburetors which I have attached as a pdf file. It was located on the www.luscombe.org web site, which also has quit a bit of additional information pertinent to Taylorcraft owners. The Stromberg carburetor reference addresses several questions brought up in another thread on this forum called "Rough Running At Full Power". I found the references to mixture control relative to altitude of particular interest.

Does this look like a good reference to those of you with some carburetor experience?

[flyguy]

Re: Stromberg Carburetor Overview

Also view:

http://www.cessna120-140.org/forum/viewtopic.php?t=2418&sid=62e20323a743f98c3aa84e3ae5439141

Darryl

[Guest]

Re: Stromberg Carburetor Overview

I discovered an informative reference on Stromberg carburetors which I have attached as a pdf file. It was located on the www.luscombe.org web site, which also has quit a bit of additional information pertinent to Taylorcraft owners. The Stromberg carburetor reference addresses several questions brought up in another thread on this forum called "Rough Running At Full Power". I found the references to mixture control relative to altitude of particular interest.

Does this look like a good reference to those of you with some carburetor experience?

I have had a neoprene needle for 22 years and used mogas for probably 20 of them.

I look up neoprene and find that it has good characteristics with chemicals and I suspect that our fuel hoses are made from neoprene compounds so I am a bit skeptical since this doc says they are dangerous.

[Garry Crookham]

Re: Stromberg Carburetor Overview

I also have a neoprene needle in my carb...been in there for 29 years and still looks like new.

Terry Norris of Aircraft Systems in Rockford Illinois gave a seminar at Oshkosh years ago on the Stromberg carb. He stated that the original Stromberg neoprene needles, identified by a hand scribed part number on the needle, was not affected by any type of aviation or auto fuel. After market needles with a stamped or machine scribed p/n would swell and deform after a few years.


Garry Crookham
N5112M
Tulsa

[flyguy]

Re: Stromberg Carburetor Overview

Later ones probably made in China, Chuckle.
DC

[NY86]

Re: Stromberg Carburetor Overview

...He stated that the original Stromberg neoprene needles, identified by a hand scribed part number on the needle, was not affected by any type of aviation or auto fuel.

Yes, there seem to be good neoprene needles and bad neoprene needles. Unfortunately, it's not that easy to identify them. I've definitely seen hand marked needles with deteriorated tips.

[Guest]

Re: Stromberg Carburetor Overview

I have a new one still in the packing I want to dig it out and see if it is neopren or Viton ( and then I am going to research the difference in the two).

My job has been very busy it may take a while to get to it.

[NY86]

Re: Stromberg Carburetor Overview

There are no Viton needles. (That would be perfect. I actually looked into having some made, but the tooling is $ and the market is small). The neoprene needle is a steel body with a neoprene tip. The Delrin needle is machined completely from a block of Delrin. It is much lighter, hence the need to add the weight to the float.

[Jim Meeker]

Re: Stromberg Carburetor Overview

I think the Cessna 120-140 pdf is a little better explanation than the Luscombe site because of its statement " Because of this “auto” feature, the manual mixture is rarely needed until cruising above 10,000 feet." I routinely use it above 7,000 and at 9,000 I usually pick up from 80-150 rpm and reduce my fuel burn rate from 4.2 gal/hr to 3.6-3.8 gal/hr. Those of us who fly around the mountains or the desert south west find it really useful because of the need to fly high for either terrain or cool air.
Cheers
Jim