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Posted

I believe a double action pump is made for vehicles that have a vacuum windshield wiper. It not only pumps gas but it is a vacuum pump to prevent or retard the wiper delay when accelerating.

Posted

I have had my 39 Desoto for 27 years and all throught its life with me I have had a 588 mechanical fule pump on the car.  Also basically all its life of of 74 years it has had a mechanical FP.  I installed the old style rotary pump prior to the newer gas blend.  This style deteriated the diaphram while using the ethinol gas.  I installed the Airtex 8011 6v pump and this has been in the car for at least 5 years now. I use this as a primer pump.

 

Now with the newer Airtex 73201 I feel that the new diaphram will our FP should not have any problems with the newer gas blend.  I was informed they are going to make a new style diaphram according to the Airtex FP technical rep that i spoke to.

 

So I am staying with the mechanical and the electric as a backup pump.

 

Rich HArtung

Desoto1939@aol.com

Posted

I would kind of like to run the mechanical pump...it's nice and quiet. But I sure like the instant starts, especially the cold starts, of the electric pump. I might put my gas tank on the roof of the car, and just go with gravity feed like my motorcycles.

 

ken.

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