AMC 304 Mechanical Fuel Pump - JeepForum.com
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post #1 of 9 Old 01-28-2019, 10:27 PM Thread Starter
MarkVMod0
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AMC 304 Mechanical Fuel Pump

I have decided to go back to the mechanical fuel pump but I see the pump arms are different depending on the year the engine was manufactured.

The 304 on this 76 CJ has a valve cover tag that reflects the engine was manufactured in 1972. My dilemma is how can one tell what fuel pump to use? Engine may be a 76 with 72 valve covers but only the PO knows and I have no idea where he is.


You guys have any tips for figuring out what fuel pump to use?


Mike

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post #2 of 9 Old 01-29-2019, 12:21 AM
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I don’t believe it’s an arm difference rather than an inlet port direction difference. The CJ frames are different between pre 76 and post 76 so the fuel lines leading up to the pump are routed a little different. One pump has its inlet port 90 degrees to the arm and the other is in line. Just match to what yours is now.

Ed
1975 CJ-6 1983 CJ-8
1986 CJ-7 Laredo 1986 2003 Inca Gold TJ Rubicon
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post #3 of 9 Old 01-29-2019, 07:29 AM
levicj7
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I also believe that pre 76 the ports come out the bottom. 76 and later out the top.

PaulLeviCJ7
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post #4 of 9 Old 01-29-2019, 12:36 PM
EricRThompson
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I have a '79 with a 304 and it came with a pump with fittings on the bottom. I've purchased 3 pumps as replacement and cannot find the hard line that goes from the pump to the carb. Anyone know where to source it? I've ordered 3 lines from Quadratec and not one will fit the pump with fittings on the top.
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post #5 of 9 Old 02-01-2019, 10:02 PM Thread Starter
MarkVMod0
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That helps guys! I can fabricate a fuel line if I can't find one at the local parts bin.

Mike
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post #6 of 9 Old 02-02-2019, 01:41 AM
82JeepCJ7
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Found a pic of mine when I was building it.
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Fuel pump.jpg  
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Beat it to fit, paint it to match!

Wheel, Wrench, Repeat.
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post #7 of 9 Old 02-02-2019, 07:49 PM Thread Starter
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Awesome picture. Thanks mucho,

Mike
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post #8 of 9 Old 06-21-2021, 03:15 PM
vorterxcj5
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Thought I had this fuel pump straight in my mind but. It appears from reading that on a amx 304 . .The outlets can be at 12 or 6.
My 86 cj7 got its engine from a ? Jeep. When I first took it off I could have sworn the fuel connect was at 12 cause I wanted to attempt (unsuccessfully)removing the lines while the engine held the pump. I also recall being unable to visualize the lines as they were under the pump ? I'm also 2nd guessing which of the different length screws go on the left of right. I'm thinking the shorter goes on right side? TIA
sorry if this a sore subject, but I gots to know
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post #9 of 9 Old 06-22-2021, 06:35 AM
Matt1981CJ7
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This is the style pump that was used on Jeeps.

AMC cars with V8s used the style with the fuel line connections on the bottom.

The hard line from the pump to filter can be found here.

I don't recall the bolts being different sizes on mine.

Matt
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FuelPumpProb.jpg   FuelReturn2.jpg  


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