The Ford Barn

46ford · 01-28-2011, 08:26 PM

Set my float height to 1-5/16" per the instructions in the carb kit. Also set float drop. New, USA-made fuel pump installed. Pump rod at nominal length. Engine running great, idles nice but I get an occasional "burp" of fuel out the bowl vent. Does this sound like a float height problem or too-high fuel pressure?

Instructions in the kit weren't real clear about setting float height; just wondering what others have used and if anyone's seen this problem before. It's a model 94 carb on a '46 mercury ('46 Ford engine).

ken ct · 01-28-2011, 08:43 PM

I set them at 1 3/8" to 1 7/16 slightly lower than specs.Also use 5.5 power valve and a old school steel needle,not rubber tipped.Float drop is not criticle as long as needle drops about 1/8" with float in lowest position [needle is open] to let gas in. Also check link from AP to throttle has no excessive up and down play. ken ct.

46ford · 01-28-2011, 09:07 PM

I'll try that setting. Always use the steel needle myself. Thanks!

Sure is nice to hear the sound of that flathead. Starts right up. All the work was worth it.

Old Henry · 01-28-2011, 11:55 PM

Original specs are in decimal inches @ 1.322" - 1.353"
1 & 11/32" would be right in that range @ 1.340"
1 & 5/16" is just under @ 1.310"
1 & 3/8" is just over @ 1.380"
1 & 7/16" is over @ 1.440"

Here is the repair manual instructions with specs:

Here is a gauge I made of card stock to set at 1 & 5/16" That's the setting I use and it works fine.

Old Henry · 01-29-2011, 12:03 AM

You might check your fuel pressure. Specs are for 1.5 to 3.5 psi.

ken ct · 01-29-2011, 01:05 AM

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I use my above specs on all 94. 1 fella claimed he ran out of gas @ that setting ,but he mentioned later he was running almost WOT for miles at like 85 mph.He raised it slightly to probebly your setting and problem was gone.Who runs at that speed for miles and miles in a flat head.A stock one at that.Kinda pushing it i say. OMO ken ct.

jdl · 01-29-2011, 10:26 AM

Old Henry... I like your Float Gauge, thanks!

ken ct · 01-29-2011, 11:40 AM

A cut out credit card works for me. ken ct.

46ford · 01-29-2011, 10:15 PM

Set to 1-3/8" and now it's running very nicely. Thanks all!

ken ct · 01-30-2011, 01:37 AM

Good boy,some of you guys are learning LOL ken ct.

Mart · 01-30-2011, 06:45 AM

Quote:

Originally Posted by ken ct

A cut out credit card works for me. ken ct.

Nice idea - I'll have a go at making one myself.

Also agree on the old school steel needles - had a flooding ploblem until I swapped in some old needles from "Junk" carbs.

Mart.

01-28-2011, 08:26 PM	#1
46ford Senior Member Join Date: Nov 2010 Location: Nottawa MI Posts: 289	float height Set my float height to 1-5/16" per the instructions in the carb kit. Also set float drop. New, USA-made fuel pump installed. Pump rod at nominal length. Engine running great, idles nice but I get an occasional "burp" of fuel out the bowl vent. Does this sound like a float height problem or too-high fuel pressure? Instructions in the kit weren't real clear about setting float height; just wondering what others have used and if anyone's seen this problem before. It's a model 94 carb on a '46 mercury ('46 Ford engine).

01-28-2011, 08:43 PM	#2
ken ct BANNED Join Date: May 2010 Location: stratford,ct Posts: 5,971	Re: float height I set them at 1 3/8" to 1 7/16 slightly lower than specs.Also use 5.5 power valve and a old school steel needle,not rubber tipped.Float drop is not criticle as long as needle drops about 1/8" with float in lowest position [needle is open] to let gas in. Also check link from AP to throttle has no excessive up and down play. ken ct.

01-28-2011, 09:07 PM	#3
46ford Senior Member Join Date: Nov 2010 Location: Nottawa MI Posts: 289	Re: float height I'll try that setting. Always use the steel needle myself. Thanks! Sure is nice to hear the sound of that flathead. Starts right up. All the work was worth it.

01-28-2011, 11:55 PM	#4
Old Henry Senior Member Join Date: Oct 2010 Location: Orem, Utah Posts: 5,762	Re: float height Original specs are in decimal inches @ 1.322" - 1.353" 1 & 11/32" would be right in that range @ 1.340" 1 & 5/16" is just under @ 1.310" 1 & 3/8" is just over @ 1.380" 1 & 7/16" is over @ 1.440" Here is the repair manual instructions with specs: Here is a gauge I made of card stock to set at 1 & 5/16" That's the setting I use and it works fine. __________________ Prof. Henry (The Roaming Gnome) "It is good to have an end to journey toward; but it is the journey that matters, in the end.” Ursula K. Le Guin in The Left Hand of Darkness Last edited by Old Henry; 01-29-2011 at 12:04 AM.*

01-29-2011, 12:03 AM	#5
Old Henry Senior Member Join Date: Oct 2010 Location: Orem, Utah Posts: 5,762	Re: float height You might check your fuel pressure. Specs are for 1.5 to 3.5 psi. __________________ Prof. Henry (The Roaming Gnome) "It is good to have an end to journey toward; but it is the journey that matters, in the end.” *Ursula K. Le Guin in The Left Hand of Darkness

01-29-2011, 01:05 AM	#6
ken ct BANNED Join Date: May 2010 Location: stratford,ct Posts: 5,971	Re: float height Sponsored Links (Register now to hide all advertisements) I use my above specs on all 94. 1 fella claimed he ran out of gas @ that setting ,but he mentioned later he was running almost WOT for miles at like 85 mph.He raised it slightly to probebly your setting and problem was gone.Who runs at that speed for miles and miles in a flat head.A stock one at that.Kinda pushing it i say. OMO ken ct.

01-29-2011, 10:26 AM	#7
jdl Senior Member Join Date: May 2010 Location: California Central Coast Posts: 931	Re: float height Old Henry... I like your Float Gauge, thanks!

01-29-2011, 11:40 AM	#8
ken ct BANNED Join Date: May 2010 Location: stratford,ct Posts: 5,971	Re: float height A cut out credit card works for me. ken ct.

01-29-2011, 10:15 PM	#9
46ford Senior Member Join Date: Nov 2010 Location: Nottawa MI Posts: 289	Re: float height Set to 1-3/8" and now it's running very nicely. Thanks all!

01-30-2011, 01:37 AM	#10
ken ct BANNED Join Date: May 2010 Location: stratford,ct Posts: 5,971	Re: float height Good boy,some of you guys are learning LOL ken ct.