The Cessna 120-140 Association Forum

Hi,

Any shop recommendations for a Stromberg rebuild?

Thanks in advance,

Bradley

http://thestrombergspecialist.com

I had my carb rebuilt by this company in Illinois. Superior job. Don't know if he's still in business.

Stromberg Specialist seems to be out of business. I recently got mine done by Central Cylinder in Omaha under $500 and less than 3 week turn around. Works well so far.

Central Cylinder did mine too about a year and a half ago. I am back to having a very slow drip if I leave the fuel selector on. I'm very pleased with the mixture control they re-installed.

mine drips too, but i have not tried turning off the selector valve. not too worried about the drip, but the carb hasn't been off the aircraft in 20+ years so i'm thinking it could use a good looking over. i will try central as the stromberg specialist is no longer taking oders. thanks for everyones input!

unlike a "normal" airplane carb, the only thing between the fuel valve and a dripping carburetor is how perfectly matched the steel needle and brass seat are in the bowl of carb.

tonycondon wrote: ↑Mon Nov 21, 2022 7:52 pm the only thing between the fuel valve and a dripping carburetor is how perfectly matched the steel needle and brass seat are in the bowl of carb.

That's pretty normal... The only difference is that today "normal" carbs use a neoprene-like material on the tip of the needle. Stromberg did, also, until there appeared a bad batch of needles (from parts unknown) and thereafter, the Stromberg neoprene tipped needle was forever damned.

Here's the instructions I mentioned in my last post.

tonycondon wrote: ↑Mon Nov 21, 2022 3:37 pm Central Cylinder did mine too about a year and a half ago. I am back to having a very slow drip if I leave the fuel selector on. I'm very pleased with the mixture control they re-installed.

Would you be willing to post the log entry for the rebuild? Mine generally does not leak, but I do move the selector to off at shutdown. Interesting to see that it is recommended practice even after a rebuild.

edidin wrote: ↑Tue Nov 22, 2022 8:33 amInteresting to see that it is recommended practice even after a rebuild.

It should be standard procedure on any gravity fuel system. Given enough time, all float valves (even those found in "normal" carburetors) will eventually fail. Gravity, on the other hand, has been demonstrated to be 100% reliable since the beginning of time.