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Sep 12, 2010 | 12:09 PM

james gang 1001

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From: Pt. Orchard, WA.

Carb questions

I have a 1964 Mercury 390 out of my old Marauder in my '55 F-100. The engine oil smells a little like gas, must be leaking through somehow. The numbers on the carb are as follows:

FoMoCo
C4AF-DJ
A4CA

I assume this is the orig. carb (bought the car with 63,000 miles on it). Does anybody know the size of the carb? Can and should I get a rebuild kit? Or is there anoter way to solve this.

P.S. I'm on a real low budget!

Thanks

Sep 12, 2010 | 01:09 PM

Bear 45/70

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From: Union, Washington

C4AF-DJ; Says the carb is of a 1964 vintage so probably the original. Is it a Holley or a Ford carb? However almost all 390 engine 4 barrels were in the 600 CFM range with vacuum secondaries.

Sep 13, 2010 | 11:22 AM

krewat

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From: Long Island USA

I'd check the fuel pump and make sure it's not leaking gas into the crankcase.

Sep 14, 2010 | 09:46 PM

james gang 1001

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From: Pt. Orchard, WA.

KREWAT, would I check the gasket (at the block?), or what would I check for the fuel pump? Is there a gasket.

Thanks
Scott

Sep 14, 2010 | 09:59 PM

Bear 45/70

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From: Union, Washington

The diaphragm in the fuel pump will be leaking. On the cheap pumps the fuel will leak thru the actuating arm opening into the crankcase.

Sep 15, 2010 | 07:55 AM

krewat

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Bear is correct, the pump can leak raw gas right into the crankcase, around the arm. I was lucky when my pump went with the original 360 in my highboy, it leaked out the vent hole instead of into the crankcase.

Sep 15, 2010 | 08:17 AM

NumberDummy

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From: Simi Valley, CA

Quote:

Originally Posted by james gang 1001

I have a 1964 Mercury 390 out of my old Marauder in my '55 F-100. The engine oil smells a little like gas, must be leaking through somehow. The numbers on the carb are as follows:

FoMoCo C4AF-DJ

C4AF-DJ = C3AZ9510AK .. 4V Ford (Auto-Lite/Motorcraft) 4V Carburetor.

Original applications 1963/64: Ford Custom/Galaxie/500XL & Thunderbird 390 / Mercury Monterey/Montclair/Marauder/S-22 390.

C2SZ9A586D .. 4V Ford (Auto-Lite/Motorcraft) Carburetor Kit (Motorcraft CT191A)

Fits: 1961/67 289/352/390/410/428 Ford 4V carburetors.