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  1. #1
    Petty Officer 1st Class
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    Default Picture of bad fuel pump diaphram

    I just thought that this would be good for people like me who are just learning for what to look for. I have circled in red where there is a hole in it and it is also very easy to see the threads showing from the cracking. This came off my fuel pump. I know for sure it had been in there for more than 5 years. So if you buy a boat and know that it has been sitting for a long time or even if not check the daiphram. It is super easy to do!


  2. #2
    Seaman Apprentice
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    Default Re: Picture of bad fuel pump diaphram

    What kind of motor do you have?

  3. #3
    Fleet Admiral jerryjerry05's Avatar
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    Default Re: Picture of bad fuel pump diaphram

    She has a 87/88 85hp Force.

  4. #4
    Supreme Mariner Frank Acampora's Avatar
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    Default Re: Picture of bad fuel pump diaphram

    Now you see why I say to put a cheap filter between the fuel pump and carbs. All that junk that cracked off the diaphragm goes right to the carb and can clog the inlet needle, causing one cylinder to run lean which can melt pistons.

  5. #5
    Petty Officer 1st Class 1983rinker's Avatar
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    Default Re: Picture of bad fuel pump diaphram

    Quote Originally Posted by Frank Acampora View Post
    Now you see why I say to put a cheap filter between the fuel pump and carbs. All that junk that cracked off the diaphragm goes right to the carb and can clog the inlet needle, causing one cylinder to run lean which can melt pistons.
    That what I did.

  6. #6
    Petty Officer 1st Class
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    Default Re: Picture of bad fuel pump diaphram

    The bottom cylinder was running lean and not sure yet if have piston problem. Was told that I was running my motor on 2 cylinders, Compression is good now

  7. #7
    Petty Officer 1st Class
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    Default Re: Picture of bad fuel pump diaphram

    Quote Originally Posted by Frank Acampora View Post
    Now you see why I say to put a cheap filter between the fuel pump and carbs. All that junk that cracked off the diaphragm goes right to the carb and can clog the inlet needle, causing one cylinder to run lean which can melt pistons.
    How do you put a filter between the pump and carbs?
    Geeco
    1988 Blue Fin Sportsman 1700
    1988 Force 85 hp
    Restoration Thread http://forums.iboats.com/boat-restoration-building-hull-repair/start-bluefin-1700-restore-383916.html

  8. #8
    Captain
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    Default Re: Picture of bad fuel pump diaphram

    Cut the fuel line between the pump and carburetors and install an in line fuel filter similar to this.

    http://www.***************/webapp/wcs...4&ci_sku=27754

  9. #9
    Supreme Mariner Frank Acampora's Avatar
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    Default Re: Picture of bad fuel pump diaphram

    You cut three inches out of the fuel line anywhere you think convenient between the fuel pump outlet and the carb inlet. Insert the plastic filter and clamp it in place. Don't ask me where: Use a little imagination---this is not rocket science.

  10. #10
    Petty Officer 1st Class
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    Default Re: Picture of bad fuel pump diaphram

    Quote Originally Posted by Frank Acampora View Post
    You cut three inches out of the fuel line anywhere you think convenient between the fuel pump outlet and the carb inlet. Insert the plastic filter and clamp it in place. Don't ask me where: Use a little imagination---this is not rocket science.
    Thanks. Not having my motor in front of me at work, I forgot about the line leading from the pump to the carb.
    Geeco
    1988 Blue Fin Sportsman 1700
    1988 Force 85 hp
    Restoration Thread http://forums.iboats.com/showthread.php?t=383916

  11. #11
    Petty Officer 1st Class
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    Default Re: Picture of bad fuel pump diaphram

    The motor it came off of was 1989 force 85HP

  12. #12
    Chief Petty Officer SweeperForce's Avatar
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    Default Re: Picture of bad fuel pump diaphram

    Force motor pics_0006A.jpg
    Real easy to do, took me about 15 minutes.

    Tom
    1989 Ebbtide Campione 180
    1989 Force 150 horsepower



    In rememberance of...
    "They that go down to the sea in ships"

  13. #13
    Petty Officer 1st Class
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    Default Re: Picture of bad fuel pump diaphram

    ON the diaphram right below the red circle you will see some orange & brown this is from running old gas through the motor. So if buy a boat and it has been sitting for awhile first thing you should do is get rid of the old gas or you will continue to have clogged carbs. I actually had a mechanic put an inline filter on as a solution to the problem and it did not work at all.

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