The Ford Barn

The Geezer · 09-17-2022, 02:26 PM

I have tried to rebuild my Marvel carb to no avail. Gushes out fuel no matter what I do. Put in a new Under the dash shut off valve from Snyder, replaced all the jets and gaskets from Dave Renner, and tried 3 times to set the fuel bowl level.
So, I am looking to buy a totally rebuilt and set up Marvel carb for my 1931 Model A Sport Coupe. Any help pointing me in the right direction would be most appreciated.
Regards to all, The Geezer

ndnchf · 09-17-2022, 02:32 PM

Call Gary Johnston. He can rebuild yours or probably sell you one.
903.490.3725

Curious - is your float valve not sealing? I just put a new float and valve from Renners in mine yesterday. It works great.

The Geezer · 09-17-2022, 02:39 PM

Thanks for the info! Yes, I put in a new float valve with the Vito’s rubber tip. I was careful to inspect it for burrs or brass chips. I rebuilt it a few weeks ago and had no problems…until it started to drip out the back intake. Then I suspected that the shut off valve was leaking and replaced it with a “gauranteed not to leak” USA valve from Snyder. All was well until I hooked everything up to check the fuel level in the bowl and turned on the valve…result was gushing fuel. Took everything apart 3 times adding washers to the float valve…with the same result.

ndnchf · 09-17-2022, 02:45 PM

Thats odd. Give Gary a call, nice guy to talk with. I'm sure he can fix you up one way or another.

The Geezer · 09-17-2022, 05:05 PM

Thanks much, will call on Monday!

katy · 09-18-2022, 11:35 AM

Sponsored Links (Register now to hide all advertisements)

Did you try tap tap tap on the fuel bowl when the fuel was running out?

ronn · 09-18-2022, 12:13 PM

Berts has rebuilds on the shelf.............

The Geezer · 09-18-2022, 03:34 PM

Yes tapped on the carb to try and stop the fuel flow to no avail. When I had the carb apart (3 times) the main fuel flow valve and float was working fine when I blew into the inlet and moved the float up to stop. I will be calling Gary Johnston tomorrow to see what he suggests.
Thanks to all who replied!

J Franklin · 09-18-2022, 04:15 PM

Quote:

Originally Posted by The Geezer

Yes tapped on the carb to try and stop the fuel flow to no avail. When I had the carb apart (3 times) the main fuel flow valve and float was working fine when I blew into the inlet and moved the float up to stop. I will be calling Gary Johnston tomorrow to see what he suggests.
Thanks to all who replied!

The test I learned was suck on the inlet on an inverted carb. creating a vacuum, use your toung to hold, and see if it holds.

Y-Blockhead · 09-19-2022, 12:09 PM

Quote:

Originally Posted by The Geezer

I have tried to rebuild my Marvel carb to no avail. Gushes out fuel no matter what I do.

Geezer, where is the fuel "gushing" out?

Unlike a Zenith, a Marvel Schebler has a seal on the GAV and will leak gas from there. Ensure the GAV seal is installed.

Also, I make my own gaskets from Buta-N/Cork. The Marvels tend to warp if the screws are tightened too much and the paper gaskets are too hard to seal. Only tighten the screws enough to collapse the lock washers.

I found the above works for me but I'm sure I will get some negitive feedback...

katy · 09-20-2022, 10:05 AM

Quote:

Originally Posted by Y-Blockhead

I found the above works for me but I'm sure I will get some negitive feedback...

[/COLOR][/SIZE][/FONT]

Not from me!

nkaminar · 09-20-2022, 11:57 AM

Sounds like a warranty issue. I would take it back to the Ford dealer.

Dick M · 09-20-2022, 01:09 PM

Gary Johnson is you man. He will sell you a rebuilt Marvel for $200 or he can repair your current Marvel....

nkaminar · 09-20-2022, 03:08 PM

Marble Misery Oil will fix it.

Y-Blockhead · 09-20-2022, 03:42 PM

Quote:

Originally Posted by nkaminar

Marvel Misery Oil will fix it.

It should, the same dude made them both...

The Geezer · 09-20-2022, 06:56 PM

Sent my unMarvel to Gary and he is rebuilding it. I suspect the GAV was the culprit but
could not get it to seal properly even with new parts from Dave Renner.

09-17-2022, 02:26 PM	#1
The Geezer Senior Member Join Date: Jul 2022 Location: The Villages FL Posts: 135	I give up! I have tried to rebuild my Marvel carb to no avail. Gushes out fuel no matter what I do. Put in a new Under the dash shut off valve from Snyder, replaced all the jets and gaskets from Dave Renner, and tried 3 times to set the fuel bowl level. So, I am looking to buy a totally rebuilt and set up Marvel carb for my 1931 Model A Sport Coupe. Any help pointing me in the right direction would be most appreciated. Regards to all, The Geezer __________________ “Finally driving a car older than me!”

09-17-2022, 02:32 PM	#2
ndnchf Senior Member Join Date: May 2012 Location: Fredericksburg, Virginia Posts: 762	Re: I give up! Call Gary Johnston. He can rebuild yours or probably sell you one. 903.490.3725 Curious - is your float valve not sealing? I just put a new float and valve from Renners in mine yesterday. It works great.

09-17-2022, 02:39 PM	#3
The Geezer Senior Member Join Date: Jul 2022 Location: The Villages FL Posts: 135	Re: I give up! Thanks for the info! Yes, I put in a new float valve with the Vito’s rubber tip. I was careful to inspect it for burrs or brass chips. I rebuilt it a few weeks ago and had no problems…until it started to drip out the back intake. Then I suspected that the shut off valve was leaking and replaced it with a “gauranteed not to leak” USA valve from Snyder. All was well until I hooked everything up to check the fuel level in the bowl and turned on the valve…result was gushing fuel. Took everything apart 3 times adding washers to the float valve…with the same result. __________________ “Finally driving a car older than me!”

09-17-2022, 02:45 PM	#4
ndnchf Senior Member Join Date: May 2012 Location: Fredericksburg, Virginia Posts: 762	Re: I give up! Thats odd. Give Gary a call, nice guy to talk with. I'm sure he can fix you up one way or another.

09-17-2022, 05:05 PM	#5
The Geezer Senior Member Join Date: Jul 2022 Location: The Villages FL Posts: 135	Re: I give up! Thanks much, will call on Monday! __________________ “Finally driving a car older than me!”

09-18-2022, 11:35 AM	#6
katy Senior Member Join Date: Jun 2015 Location: Red Deer, Alberta Posts: 5,046	Re: I give up! Sponsored Links (Register now to hide all advertisements) Did you try tap tap tap on the fuel bowl when the fuel was running out? __________________ If you don't hear a rumor by 10 AM, start one!. Got my education out behind the barn!

09-18-2022, 12:13 PM	#7
ronn Senior Member Join Date: Feb 2011 Location: NNNNNNNNJJJJJJJJJJ Posts: 6,791	Re: I give up! Berts has rebuilds on the shelf.............

09-18-2022, 03:34 PM	#8
The Geezer Senior Member Join Date: Jul 2022 Location: The Villages FL Posts: 135	Re: I give up! Yes tapped on the carb to try and stop the fuel flow to no avail. When I had the carb apart (3 times) the main fuel flow valve and float was working fine when I blew into the inlet and moved the float up to stop. I will be calling Gary Johnston tomorrow to see what he suggests. Thanks to all who replied! __________________ “Finally driving a car older than me!”

09-20-2022, 11:57 AM	#12
nkaminar Senior Member Join Date: Jan 2012 Location: Western North Carolina Posts: 3,897	Re: I give up! Sounds like a warranty issue. I would take it back to the Ford dealer. __________________ A is for apple, green as the sky. Step on the gas, for tomorrow I die. Forget the brakes, they really don't work. The clutch always sticks, and starts with a jerk. My car grows red hair, and flies through the air. Driving's a blast, a blast from the past.

09-20-2022, 01:09 PM	#13
Dick M Senior Member Join Date: May 2010 Location: Ukiah, CA Posts: 477	Re: I give up! Gary Johnson is you man. He will sell you a rebuilt Marvel for $200 or he can repair your current Marvel....

09-20-2022, 03:08 PM	#14
nkaminar Senior Member Join Date: Jan 2012 Location: Western North Carolina Posts: 3,897	Re: I give up! Marble Misery Oil will fix it. __________________ A is for apple, green as the sky. Step on the gas, for tomorrow I die. Forget the brakes, they really don't work. The clutch always sticks, and starts with a jerk. My car grows red hair, and flies through the air. Driving's a blast, a blast from the past.

09-20-2022, 06:56 PM	#16
The Geezer Senior Member Join Date: Jul 2022 Location: The Villages FL Posts: 135	Re: I give up! Sent my unMarvel to Gary and he is rebuilding it. I suspect the GAV was the culprit but could not get it to seal properly even with new parts from Dave Renner. __________________ “Finally driving a car older than me!”