L2 Prop Surprise

[Ed O'Brien]

Re: L2 Prop Surprise

Thanks Marty;
I've got a mixture control push-pull thingy... I think it doesn't do anything currently... which is kinda like those buttons at the stoplight for getting the pedestrian walk signal. I gotta check to see if it's even hooked up to the carb. Pull seems to do nothing and push seems to do nothing more... other than move the control thingy up and down, of course. I've got a 5 year old grandson with a phony automobile console and a steering wheel on his car seat. I've noticed that he turns in sequence with his dad or mom while they're driving... basically I'm doing the same with the carb.
With regards; ED O

[VictorBravo]

Re: L2 Prop Surprise

Wish we had a mountain wave or coast wave phenomenon in Calif to keep the rest of the nations and worlds rejects out of Ca.

Have them fly over Bishop, CA in about February !

[M Towsley]

Re: L2 Prop Surprise

Ed,

Take a look on the top left of the carb as it faces forward. If you have the mixture control there will be a small arm that looks as though it should have a cable attached. I'm thinking your control is either not hooked up, or you don't have a mixture on the carb as you would discover a difference when you pulled the mixture out.

[Ed O'Brien]

Re: L2 Prop Surprise

Thanks Marty;
You're not just a Prince... but a floral Prints too! Very good of you! I'll check it this weekend when I'm back at the hangar. I'm sorting out prop issues right now. Thanks again. With regards; ED OBRIEN

[VictorBravo]

Re: L2 Prop Surprise

Inside the carburetor there should be a couple of discs with metered holes in them, which are attached to the arm previously mentioned. These holes are what operate the mixture.

According to my good friend and mentor L-2 Gary, if you remove the safety wire from the lever and move the arm back and forth.... if it does not move easily and feels like it's grinding or scraping, chances are your carb might not even have all the parts installed for the mixture to work.

There are a FEW people who know these carburetors and can work on them. Many carburetor shops and mechanics cannot. You have to find someone who is qualified, of course.

Above 5000 feet it should make a noticeable difference.

[Ed O'Brien]

Re: L2 Prop Surprise

Thanks Bill. As always I so appreciate your information. As it is, I am looking for the "Stromberg Genius" at this moment. Most appear to have passed away or retired and therefore are just former geniuses. However, I'm confident that in a little frail shack on a deserted dirt stip near abandoned Colorado hamlet... there I will find the last great carberator tinkerer. WWhoopss, oh my...

I'm sorry... I've been reading the new Harry Potter and I was overcomed by adjectives. Anyway, I'm looking for the right guy now.
With regards;
ED OBRIEN

[Ragwing nut]

Re: L2 Prop Surprise

Those are stupidly simple to work on and if you have an A-65 overhaul manual, the instructions are in the back of it. I quit working on Marvels because at the price of the overhaul kit, for another few $$$, I can get the factory to overhaul and warranty it. I would never call my self an expert, but I do know how to work on them.

Mike

[Ed O'Brien]

Re: L2 Prop Surprise

Mike;
My Stromberg was just overhauled as was this new C-85engine... so the issue is the fine tune adjustment for Pressure altitude... instead of the gross full-open set up I've got now.

You're in the Panhandle aren't you? I've thought of visiting that direction on my way to see friends in OKC.
With regards;
ED OBRIEN

[M Towsley]

Re: L2 Prop Surprise

Ed,

As of three years ago I didn't know what a Stromberg was. Now, with the approved A&P looking over my shoulder, (ahem), I have set the float height and rebuilt the mixture controls, which truly is stupidly simple, on three Strombergs. They all run/ran great. There is a wealth of information on the internet regarding the nuances of these carbs. Go to this: www.bowersflybaby.com/tech/engines.htm This is where I learned about the Stromberg carburetor. I'm kinda sorta teaching my friend's new mechanic on how to do it because he has never messed with these carbs. A little time, patience and desire to learn, and a couple of homemade tools, is all it takes. There really is no magic in working on these, just the desire or need to learn it.

[Ragwing nut]

Re: L2 Prop Surprise

Mike;
My Stromberg was just overhauled as was this new C-85engine... so the issue is the fine tune adjustment for Pressure altitude... instead of the gross full-open set up I've got now.

You're in the Panhandle aren't you? I've thought of visiting that direction on my way to see friends in OKC.
With regards;
ED OBRIEN

I am just south of OKC right off I-35. Putting a mixture control on it will probably solve alot of your problems

Mike

[astjp2]

Re: L2 Prop Surprise

I had to install the parts for the mixture on my '65 stromberg and while I was at it it wound up with the big venturi new bleed port and the main jet. I took my A-65 to 13,800 in the Wind Rivers of Wyoming and at full lean it was still rich. One thing to make sure is before you tighten the nut that holds the nut, you need to make sure that the upper and lower plates are rigged correctly. I used an AN426-3 rivet to align the largest holes and moved the arm to the full rich position before snuggin down the nut. Then disassemble the mixture assembly and remove the rivet. You should get full travel and the correct alignment of the holes. I used to run at about 1/2" out on my cable and the Field elevation at Ogden is 4500. If you try to remove the main discharge nozzle and it does not want to turn easily....leave it and continue without removing it. I have 4 carb bodies that the discharge nozzle broke off in with no way to remove whats left. Its Brass inside aluminum.
I am running a 74-43 Sens. prop. good climb and crusie. Borer Props are 88 inches for climb performance, maybe they have something there....
Good luck Tim