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  1. S

    a carburetor shouldn't spill fuel like this, right?

    I have the original OEM pump. its never shown signs of failure, but I'm allowing for the possibility that the OEM was in fact originally 4-6psi, and the aftermarket are 9-10 psi (specifically for marine use), and my pump may have increased in pressure (to exactly 9.3psi). All the carbs state...
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    a carburetor shouldn't spill fuel like this, right?

    I installed a fuel regulator, which brought the pressure to under 6psi. It still flooded on one side. I contacted the seller and agreed to inspect. I disassembled and tested the floats, seats and needles. Everything seems operational. Both floats held pressure when manually closed...
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    Need help locating 4-6psi fuel pump for 4.3 w/ 4bbl carb

    already on its way. i just want To know why more people aren’t running into this problem with replacement pumps? Are their 4bbl carbs more tolerant? a max of 6psi at the carb seems to be well established as a limit on the float/needle. I can’t justify dropping $630 just to see if my OE pump...
  4. S

    Need help locating 4-6psi fuel pump for 4.3 w/ 4bbl carb

    I'm stumped! I cannot find a suitable replacement fuel pump with 4-6psi operating pressure! My OEM fuel pump (861155-2) is operating at 9-10psi. (I don't know if it's always been this high). Carb is flooding. Carb supplier says max of 6.5 psi. Edelbrock also states max of 6.5 psi for their...
  5. S

    a carburetor shouldn't spill fuel like this, right?

    I pulled it: 861155-2 2072 A
  6. S

    a carburetor shouldn't spill fuel like this, right?

    Were these all the same part number, just performing differently, or did you order a different pump for the 2nd/3rd orders? do you have a Carter part num for 4-5psi? thanks
  7. S

    a carburetor shouldn't spill fuel like this, right?

    My current pump is the original OEM pump 861155-3 It's possible that the pump is failing and it increased pressure from 4-6 to 9-10, but it's odd that the aftermarkets all seem to be rated at 9-10psi
  8. S

    a carburetor shouldn't spill fuel like this, right?

    Water separator, yes. I have not tested the AS valve but since the pump is flooding the carb, it doesn't seem to be restricting the flow.
  9. S

    a carburetor shouldn't spill fuel like this, right?

    It only leaks on the port side. it's a Edelbrock style but is a weber rebuild: Carter AFB-4.3L-Marine-Electric Remanufactured 4 Barrel 4.3L Marine Carburetor from National Carb. I'm going to add a regulator and test with fresh fuel before cracking it open or returning the carb.
  10. S

    a carburetor shouldn't spill fuel like this, right?

    I have a 861155A3 installed. I believe it is original.
  11. S

    a carburetor shouldn't spill fuel like this, right?

    that was caused by the angle and the glass jar. the fuel is consistently one color/layer, no sediment.
  12. S

    a carburetor shouldn't spill fuel like this, right?

    Now i'm really confused! I have an original mercruiser fuel pump. It's operating at 9-10 psi. The aftermarket versions list 9-10 psi operating range - and are $55. An original fuel pump is now $630. How is it that my original is operating at the same as aftermarket specs? I cannot find there...
  13. S

    a carburetor shouldn't spill fuel like this, right?

    Fuel pressure gauge was on order and just arrived. I connected it directly to the fuel pump output (in place of the fuel tube that connects to the carb, without a Tee. It reads over 9 when operating, and a little over 1 when disconnected. I don't know if it should zero out or if it's...
  14. S

    a carburetor shouldn't spill fuel like this, right?

    Come to think of it, I may have had the same issue. This is where the problem started. I will check the fuel pressure tomorrow. I just bought the carb, and don't want to break into it if it is not working - I'd rather return it. I did remove the inlet covers on top to expose the metering...
  15. S

    a carburetor shouldn't spill fuel like this, right?

    I bypassed the oil pressure switch and the fuel pump runs with the ignition on, before starting
  16. S

    a carburetor shouldn't spill fuel like this, right?

    Will a failed pump pump too much pressure?, or just not enough? Can I rule out a fuel pump issue? ;) thanks!
  17. S

    a carburetor shouldn't spill fuel like this, right?

    recently purchased and installed a Carter AFB-4.3L-Marine-Electric Remanufactured 4 Barrel 4.3L Marine Carburetor - Electric Choke. Same model, installed easy. I have been diagnosing fuel supply and bypassed the oil pressure sensor to test the fuel pump. This is what I'm seeing at the...
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    2000 mercruiser 4.3 alpha 1 gen 2

    I have a 1991 stingray 190lx with a 2001 reman 4.3 4bbl alpha one gen 2 I replaced the batwings 10 years ago. I also have a temp diff with starboard riser being hotter. It was explained to me as normal.
  19. S

    procedure to manually flush non-running 4.3 engine?

    thanks. I have replaced the exhaust manifold and elbows twice. I'm prepared to do it again. I always rinse well with salt-away to minimize the impact.
  20. S

    procedure to manually flush non-running 4.3 engine?

    :) It ran for 10 minutes on muffs, two days in a row. no problem.. when I hit the bay, this started.
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