62Ranchero200
Famous Member
Greetings Ford Six Fans,
Have always believed that fuel pumps were interchangable between all Ford small sixes, give or take the fitment of the vacuum pump (for the windshield wipers) in the early models, upward vs. rearward-facing fuel fittings, and fuel line size compatibility.
When I put my 250 together, had the fuel pump from my old 200 (from a '79 Fairmont), which only had a few hundred miles on it, so used that for the 250. As far as pumping fuel, it worked, and up to the point that I revved the engine so far (maybe 4,000 RPM - it's still early in the break-in period) the engine was never starved for fuel.
However, I noticed last weekend that there was a slow oil leak from the bottom of the fuel pump mount to the block. Picked up a new pump and gasket at O'Reilly, Precision Pumps # M16212.
Here's where it gets interesting: the new pump (which was spec'd for a '72 Maverick, 4.1L 250 ci) seems substantially different from the old one. The body of the new pump is substantially larger, and the inlet fitting is 3/8", compared to 5/16" for the old one; both of which I could put down to manufacturing differences. But the pumping arm is one piece of curved metal on the old pump, a piece of metal with a slight angle to it and also what appears to be a hardened plate riveted to it on the new pump. Most strikingly though, the shape of the mounting surface on the pump is flipped vertically on the new pump compared to the old one. That is, if one expects that both pumps should be mounted with the fuel fittings up, the fuel pump gasket has to be turned one way to fit on the old pump, but flipped vertically to fit on the new pump.
Looked at the mounting boss, and as far as I can tell there's enough surface on the mounting boss to mount the pumps either way, although fuel fittings up is the only way that would work for me, because the fuel fittings hit the motor mount if I mount the pump with the fuel fittings down.
Surfed the Advance Auto Parts and NAPA web sites and found the same type of fuel pump spec'd for the '74 250.
Are fuel pumps fully interchangable between 200s and 250s?
Thanks
Bob the Builder
Have always believed that fuel pumps were interchangable between all Ford small sixes, give or take the fitment of the vacuum pump (for the windshield wipers) in the early models, upward vs. rearward-facing fuel fittings, and fuel line size compatibility.
When I put my 250 together, had the fuel pump from my old 200 (from a '79 Fairmont), which only had a few hundred miles on it, so used that for the 250. As far as pumping fuel, it worked, and up to the point that I revved the engine so far (maybe 4,000 RPM - it's still early in the break-in period) the engine was never starved for fuel.
However, I noticed last weekend that there was a slow oil leak from the bottom of the fuel pump mount to the block. Picked up a new pump and gasket at O'Reilly, Precision Pumps # M16212.
Here's where it gets interesting: the new pump (which was spec'd for a '72 Maverick, 4.1L 250 ci) seems substantially different from the old one. The body of the new pump is substantially larger, and the inlet fitting is 3/8", compared to 5/16" for the old one; both of which I could put down to manufacturing differences. But the pumping arm is one piece of curved metal on the old pump, a piece of metal with a slight angle to it and also what appears to be a hardened plate riveted to it on the new pump. Most strikingly though, the shape of the mounting surface on the pump is flipped vertically on the new pump compared to the old one. That is, if one expects that both pumps should be mounted with the fuel fittings up, the fuel pump gasket has to be turned one way to fit on the old pump, but flipped vertically to fit on the new pump.
Looked at the mounting boss, and as far as I can tell there's enough surface on the mounting boss to mount the pumps either way, although fuel fittings up is the only way that would work for me, because the fuel fittings hit the motor mount if I mount the pump with the fuel fittings down.
Surfed the Advance Auto Parts and NAPA web sites and found the same type of fuel pump spec'd for the '74 250.
Are fuel pumps fully interchangable between 200s and 250s?
Thanks
Bob the Builder
