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  1. #1

    Jabsco Raw Water Parts

    I could use a confirmation that the Jabsco 6980-3100 pump is correct for a 12V71 from anyone who's rebuilt theirs. The DD # from the starboard pump cover plate is 23507972. After 37 years, I can't be certain the cover hasn't been scavenged from another unit along the way.

    I think it's time for a port-side tune-up with a new cam, wear plate and end cover. I felt like the last new impeller I installed went in a bit too easily. I'm also running a tad bit higher water temp even after that new impeller and a clean HE.
    20200723153704.jpg
    Purty ain't it.

    This cover plate looks a little strange (stamping), and the good side ain't much better than what's showing. Since the boat has ZF gears, the Allison stamping is unlikely not OEM; the other pump has only a DD stamp.
    IMG_1951.jpg
    Just trying to order right the first time. Thanks for your help!
    Semper Siesta
    Robert Clarkson
    ASLAN, 1983 55C #343
    Charleston, SC

  2. #2

    Re: Jabsco Raw Water Parts

    Here's my file on the Jabsco Raw water pump for 12-71.
    Marineparts and pumps makes a great package and it is packed by someone who clearly cares.



    Pump 18780-0001
    Cam 18785-0000
    Impeller 1879-0001
    Gasket 5194567
    Shaft 17366-1000
    Major Repair Kit 23502097

    eBay Vendor: marinepartsandpumps
    New pump repair kit for Jabsco 18780-0001 Detroit Diesel Pump 8927296
    Complete Kit , 18780-0001MJK , Major Service Kit. Contains All Internal Service Parts Except the Shaft
    Similar to DD 23502097, but does not include the shaft.
    Replaces:
    1 Each 18786-0001-W Impeller kit 18786-0001 and 18785-O'RING
    1 Each 18784-2000 End Cover
    1 Each 18787-0000 Wear plate
    1 Each 18785-0000 Cam Liner
    2 Each 18752-0000 Ball Bearing
    1 Each 92701-0180 Seal
    1 Each 96080-0371 Mechanical Seal
    1 Each 18721-0000 Retaining Ring
    1 Each 18725-0000 Retaining Ring
    4 Each 91005-0040 Screw with lock washer
    1 Each 91402-0230 Woodruff Key
    1 Each 18754-1004 Slinger O-ring
    1 Each 23501662 Mount Gasket
    2 Each 5117786 Flange Gasket
    Impeller Specifications:
    Width: 3-1/2" (88.9mm)
    Diameter: 4-5/8" (118mm)
    Shaft: 1" (25mm)
    Drive: Type 5 Double Flat |
    Material: Neoprene
    Silhouette: R 9 blades
    Summer Star II
    1986 Christensen 70'
    Ensenada, MX

  3. #3

    Re: Jabsco Raw Water Parts

    I don't know if this image will be legible

    Jabsco Raw Water Pump.jpg
    Summer Star II
    1986 Christensen 70'
    Ensenada, MX

  4. #4

    Re: Jabsco Raw Water Parts

    Your pic shows the 5 screw cover. Your friends keep sending 4 screw cover pump data.
    I'm sure you have the 3 1/2" , 5 screw cover pump.
    For all, Pages from Depco Pump;
    Attached Images
    Last edited by Captain Ralph; 08-04-2020 at 08:25 PM.

  5. #5

    Re: Jabsco Raw Water Parts

    Many thanks to all for the great information.
    Semper Siesta
    Robert Clarkson
    ASLAN, 1983 55C #343
    Charleston, SC

  6. #6

    Re: Jabsco Raw Water Parts

    Well I think I squeezed about all I could get out of this pump cam. No wonder the impellers slid in noticeably easier.

    IMG_1972.jpg
    Old port side cam was worn .045 thinner at center.
    IMG_1969.jpg
    The fingers were up to .230" eroded (overall). No doubt the pump will move more water. Glad I ordered two sets of parts. Now the starboard pump will get the treatment.
    Semper Siesta
    Robert Clarkson
    ASLAN, 1983 55C #343
    Charleston, SC

  7. #7

    Re: Jabsco Raw Water Parts

    Quote Originally Posted by racclarkson@gmail.com View Post
    Well I think I squeezed about all I could get out of this pump cam. No wonder the impellers slid in noticeably easier.

    Attachment 42266
    Old port side cam was worn .045 thinner at center.
    Attachment 42267
    The fingers were up to .230" eroded (overall). No doubt the pump will move more water. Glad I ordered two sets of parts. Now the starboard pump will get the treatment.
    Yup, looks like it was definitely time.
    SOUTHPAWS
    1986 52C Hull #391 8v92TI
    PENSACOLA, FL

  8. #8

    Re: Jabsco Raw Water Parts

    Eat sand much? Someone flipped the cover probably due to scoring. But not a good idea to use the logo side. The company was DDA for years had no bearing on what the engine was driving.
    "DON'T BELIEVE ANYTHING YOU READ OR HEAR AND ONLY HALF OF WHAT YOU SEE" - BEN FRANKLIN




    Endless Summer
    1967 50c 12/71n DDA 525hp
    ex Miss Betsy
    owners:
    Howard P. Miller 1967-1974
    Richard F Hull 1974-1976
    Robert J. & R.Scott Smith 1976-present

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