06H Problem

[Vic Piano]

The carburetor on our '39 Zephyr (06H) has developed a problem... After the car had been sitting for almost a month, I drove her on Saturday, however she would not accelerate under a load in first or second gear but once in high she cruised with no trouble. Idling is a different story. When cold she would not idle and after reaching normal driving temperature she would die when coming to a stop. I pulled the spark plugs to find each one wet and coated with carbon. After changing the plugs she ran with restored power in first & second however the stalling persists. There is no external leaking of fuel from the carb so I'm thinking that the power valve might be the problem. Anny suggestions, before I pull the carb to rebuild it? Thanks, Vic

 

[Steves46]

Hi Vic. Sorry to hear about the problem with the Zephyr and it sounds very close to the problems I am having with the Holley 1904 carb on my 55. Did you get any backfires? I'm by no means a carburetor expert but it sounds like either the power valve or clogged passages in the idle circuit would be my first suspects. Are you using a fuel filter to catch any possible garbage in the lines? Good luck and hope you are able to resolve the issue. Steve

 

[Ed Pitts]

Vic, you might also check the float. Mine had a crack and the brass float was full of gas causing a very rich condition. Power value is a good guess as well. Ed

 

[G.M.]

VIC Sounds like dirt from the gas tank. My 39 was running almost perfect with a little glitch once in a while for about a year. On the way up to Pa. I got dirt in the tank and had to stop about a dozen times and blow through the fuel line. I put a new pump on at one of the stops. After I got here I pulled the tank and cleaned it. Was running as before with a slight glitch once in a while. I put the pump back on that I changed back on road and as I backed out of the garage it acted like I knocked 3 or 4 plug wires off. I drove it a few miles and it cleared up a little then got like you described. Got dirt from inside the pump into the carb. I pulled the carb and shot some carb cleaner through all the holes and put it back on. There was some fine dirt in the bowl that was flushed out. It was 90% better but not right so I pulled it back off, took it all apart, ran wires through all the jets and tubes. This time I turned the air compressor on and blew it out good using carb cleaner and denatured alchol. Put it back on and it's now perfect, not a glitch in 200 miles. This was a Stromberg 97. The lazy man way just don't work, do it right the first time. I use Strombergs on all my drivers, I don't like the power valves in the Holley type. G.M.

 

[Vic Piano]

Thanks for all the suggestions, I think I'll pull the carb, give it a good cleaning and see what happens. Vic

 

[TomT/Williamsburg]

Hey, Vic - sounds like you've pulled something into the carb from the tank or your rubber lines - do you have any rubber lines? If so, are your lines the old rubber or have you replaced them with Fuel injection lines? If you haveanything rubber, replace it with fuel injection hoses - they will not deteriorate with the new gas.

Even if this is not the problem, while you are down it's a good time to replace it.

Good luck and keep us posted ....

 

[Vic Piano]

Hey, Vic - sounds like you've pulled something into the carb from the tank or your rubber lines - do you have any rubber lines? If so, are your lines the old rubber or have you replaced them with Fuel injection lines? If you haveanything rubber, replace it with fuel injection hoses - they will not deteriorate with the new gas.

Even if this is not the problem, while you are down it's a good time to replace it.

Good luck and keep us posted ....

Tom, that's good advice, I think I'll do that.

Vic

 

[Pothole Jim]

Vic, Shouldn't your car have a Holly 91-99 carb not the 06H? Just asking,thought 39' got the 91-99 til mid 40 then changed to 06H.

 

[Vic Piano]

Vic, Shouldn't your car have a Holly 91-99 carb not the 06H? Just asking,thought 39' got the 91-99 til mid 40 then changed to 06H.

You are correct. The 06H is designated as a '40-'41 part #. In the original owner's manual, for the '39 Lincoln Zephyr (96H), the only carburetor pictured/mentioned is the Bendix Stromberg, with a prefix of 86H/96H. The '39 Lincoln Zephyr Chassis parts book lists the Bendix-Stromberg and the Holly 86H-9510-A2. That being said, the carburetor I'm using on our '39 LZ is in fact a 06H, as the HV-12 in our car is actually a 1940 LZ HV-12, it was rebuilt and installed in our ‘39 LZ in 1952 by the cars second owner.

Vic

 

[Pothole Jim]

OK,

But, what was the Holley LZ 91-99 for?

 

[Vic Piano]

I have two 91-99's set up on the 59A in our '47 Ford Convertible, don't know if they are correct for the 59A's but they work well.

 

[1952henry]

And now, for a 1938 LZ carb...

Hard to see, but the fuel bowl says Chandler Groves, and the back is cast LZ.

Do the 91-99s have the LZ or a 1?

As you know the part number 91-99 breaks down to mean 1939/221-1939/239. Not applicable to the V12, but the casting on the carb would have carried over from the Ford/Mercury since the carbs are practically the same sans a 1" venturi and LZ script.

No Strombergs were offered on Ford products after early 1938. Not sure why the book would say something about B-S. My manual doesn't mention Stromberg after the LZ.

 

[Vic Piano]

And now, for a 1938 LZ carb...

Hard to see, but the fuel bowl says Chandler Groves, and the back is cast LZ.

Do the 91-99s have the LZ or a 1?

As you know the part number 91-99 breaks down to mean 1939/221-1939/239. Not applicable to the V12, but the casting on the carb would have carried over from the Ford/Mercury since the carbs are practically the same sans a 1" venturi and LZ script.

No Strombergs were offered on Ford products after early 1938. Not sure why the book would say something about B-S. My manual doesn't mention Stromberg after the LZ.

Most likely, the owner's manuals for the '39 Zephyr were printed in '38 and, as we all know, Ford made running changes throughout production on most vehicles in any given year especially in the Flathead era.

 

[Pothole Jim]

Do the 91-99s have the LZ or a 1?

The 91-99 carbs shown do have LZ on the back of them.

As you know the part number 91-99 breaks down to mean 1939/221-1939/239. Not applicable to the V12, but the casting on the carb would have carried over from the Ford/Mercury since the carbs are practically the same sans a 1" venturi and LZ script.

Interesting that the 91-99 was designed for 221 and the 239 but was installed in Lincolns for 267 CID.

 

[Pothole Jim]

How is it possible for a carb to be designed for 3 different CID motors? I know that you can change the jets. But that doesn't mean you can get enough air delivery, I would think that the Lincoln would be starving for air with that carb.

 

[frenchy dehoux]

Vic
What size main jet and power valve do you have in your carburetor. Do you have the standard bore or has the engine been bore.

Thanks
Frenchy

 

[Vic Piano]

Vic
What size main jet and power valve do you have in your carburetor. Do you have the standard bore or has the engine been bore.

Thanks
Frenchy

Frenchy, I'm running a stock 06H (don't know the jet size or power valve #) and, to my knowledge, the '40 HV-12 in our car is still the stock bore, etc., we bought the Zephyr 10 years ago and I've been collecting parts for her and driving her all this time. I've not had to do anything major except replace a broken rear axle. I've got a Columbia out of another '39 Zephyr that we'll be installing soon (I hope). Sorry I can't be more help.

Vic

 

[1952henry]

How is it possible for a carb to be designed for 3 different CID motors? I know that you can change the jets. But that doesn't mean you can get enough air delivery, I would think that the Lincoln would be starving for air with that carb.

Re-read my post. The LZ carbs had 1" venturis. A variety of the AA1 (94) was used on Y-blocks of 272 cid with 1" and 1.012 venturis.
T

 

[1952henry]

Frenchy, I'm running a stock 06H (don't know the jet size or power valve #) and, to my knowledge, the '40 HV-12 in our car is still the stock bore, etc., we bought the Zephyr 10 years ago and I've been collecting parts for her and driving her all this time. I've not had to do anything major except replace a broken rear axle. I've got a Columbia out of another '39 Zephyr that we'll be installing soon (I hope). Sorry I can't be more help.

Vic

It seems the few 06H carbs I've had apart had #51 jets. If the carb was rebuilt recently from standard AA1 kits, I would guess a 7.5 pv.

 

[1952henry]

How is it possible for a carb to be designed for 3 different CID motors? I know that you can change the jets. But that doesn't mean you can get enough air delivery, I would think that the Lincoln would be starving for air with that carb.

Think about the Stromberg 48 with its 1-1/32" venturi. In April of 1936 it was downsized to the .97 venturi. Ford called the 97 an ""economy" carburetor. Yet either one works well on a flathead. Another example comes to mind with the Rochester 2g. People put them on a flathead, and GM used them on 283s and even larger cid engines, I believe.