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How "Stiff" Should Fuel Pump Arm Be?

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Old 05-01-2004, 02:13 PM
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rollavette71
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Default How "Stiff" Should Fuel Pump Arm Be?

I have a new fuel pump ready to go in my '71 (350 stock).... and it's been awhile since I've replaced a mechanical fuel pump. I am not able to move the arm very much on the new one (don't have the old one out yet to compare to). How "stiff" should the arm be? Should I be able to move it with just the strength of my hands and generate some suction/pressure? I'm only getting about a quarter inch movement. Is that all the cam moves it? I don't want to put it in if it's defective and end up bending something.

Thanks!

Hank
Old 05-01-2004, 02:21 PM
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BSeery
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Default Re: How "Stiff" Should Fuel Pump Arm Be? (rollavette71)

I remember them being pretty darn stiff, and the cam only throws it about 1/2 inch or so.
Old 05-01-2004, 04:21 PM
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any4xx
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Default Re: How "Stiff" Should Fuel Pump Arm Be? (BSeery)

:iagree:

Pretty dambed stiff.
Old 05-01-2004, 04:26 PM
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robertmc48
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Default Re: How "Stiff" Should Fuel Pump Arm Be? (rollavette71)

They are stiff...remember a few 100 HP is working them...I'm not "Arnold"...it always seem hard to me.
Old 05-05-2004, 02:03 PM
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Frank75
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Default Re: How "Stiff" Should Fuel Pump Arm Be? (robertmc48)

Does anyone know the proper pushrod length? I'm in the same boat with a fuel pump - it's been 30 years since I held one like that in my hands and the lever hardly moves!
Old 05-05-2004, 02:18 PM
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mapman
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Default Re: How "Stiff" Should Fuel Pump Arm Be? (Frank75)

Just remember to bump the engine over so that the pushrod is not "up" on the camshaft lobe - makes installation much easier. :)

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