Holley "metallurgy problems"

[HOWDY69]

Holley is going to replace my carb. My date code (0336) matches a period of time in late 05 and early 06 when Holley was having "metallurgy problems." If you have a carb from this time period look inside your primary fuel bowl and see if the coating is turning to a gray "dust". This dust had clogged my accelerator pump nozzles and who knows what else.

[JMcTurnan]

Yes, it is alright. I mean you clean it out. Mine stopped after the first time it did it. But yea I know what your saying, because has done that. Good carb cleaner and a tooth brush. But once it's full of gas it usually doesn't come back. If you let it set for like 1 day, it will appear.

[DuckRyder]

Yes, it is alright. I mean you clean it out. Mine stopped after the first time it did it. But yea I know what your saying, because has done that. Good carb cleaner and a tooth brush. But once it's full of gas it usually doesn't come back. If you let it set for like 1 day, it will appear.

That really doesn't make sense. I *think* it says that you have to clean your carb every day with a tooth brush and carb cleaner but that isn't a problem... that can't be right though...

[67RED]

where does it say once a day. i guess im just missing it.

[HOWDY69]

I decided this was a little too severe for a tooth brush and Holley agreed.

http://www.fordification.com/galleries/ ... ?pos=-5679

[DuckRyder]

where does it say once a day. i guess im just missing it.

So what does it say to you?

[HOWDY69]

where does it say once a day. i guess im just missing it.

So what does it say to you?

To me it says as long as JM kept it full of gas he has not had a problem but if he lets it sit without gas in it he has had a sinilar, but less severe, problem.

[Dragon]

I had found a high performance body for 89 I was going to turn you onto but since holley is kicking in the carb it is a moot point.

[DuckRyder]

O.K. I can see how you could get that out of it...

At any rate, if I had any problem similar and there was a possibility Holley would replace it I'd certainly be on the horn with them...

Glad they are taking care of you!

[JMcTurnan]

Exactly howdy, when your running it, I have no problem with it making a dust film substance. But If I let it sit for the shortest time, like maybe a week. it will form pretty quickly. I only had to clean it out once, when it sat for like 2 months. Other than that, it doesn't cause me much of a hastle.

[Dragon]

It is an nitrogen hydrogen bonded base of Zinc alloy and the ethanol in our winter fuels breaks the hydrogen nitrogen bond which weakens the zinc to a point it becomes dust.

I little tip I picked up from US Navy Corrosion Control School that I taught.

[DGrant09]

Where on the carb can we find the date code?
Thanks

[Dragon]

On the air horn under the model number on most holleys.

[HOWDY69]

Where on the carb can we find the date code?
Thanks

It is on the front of the air horn (the stack with the choke plate in it) just below the list number.

[JMcTurnan]

I dont even know the year on mine, But i know I had the problem he was talking about.