substitute for OMC sealer 1000

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This topic contains 23 replies, has 8 voices, and was last updated by Avatar fleetwin 4 days, 13 hours ago.

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    rudefan29070
    US Member - 1 Year
    Replies: 23
    Topics: 9
    #184537

    Hello Everyone,
    I need to reseal 3 lower units. Does anyone know of a good substitute for the sealer 1000 that the service manual calls for? I’ve seen a video on the tube that says 3M 847. But that stuff isn’t available anywhere. I was hoping for a sub that I could pick up locally.

    Thanks in advance,
    Shawn

    bobw
    bobw
    US Member - 1 Year
    Replies: 640
    Topics: 28
    #184538

    3M 847 is what you want to seal lower units and you can order it on-line.

    https://www.amazon.com/s?k=3m+847+scotch-grip+rubber+%26+gasket+adhesive&crid=1NYMVTFQ0WEXB&sprefix=3m+847+gasket+a%2Caps%2C182&ref=nb_sb_ss_i_2_15

    I have also used Permatex Aviation Gasket #3 but that does not always seal properly. Best to use the 847.

    Some folks also use Permatex Ultra Black gasket maker.

    Bob

    1954 Johnson CD-11
    1956 Johnson RD-18
    1958 Johnson QD-19
    1959 Johnson QD-20

    • This reply was modified 2 weeks, 4 days ago by bobw bobw.
    Mumbles
    Mumbles
    Canada Member - 2 Years
    Replies: 4200
    Topics: 425
    #184549

    Go with the Permatex Ultra Black Silicone Adhesive. It’s easy to work with, readily available, and bullet proof if allowed to cure properly.

    Avatar
    rudefan29070
    US Member - 1 Year
    Replies: 23
    Topics: 9
    #184562

    Thanks for the replies guys. I will order a tube of 847. I’m going to do one with 847 and one with the Ultra Black just to see. Hey its a hobby so why not.

    RICHARD A. WHITE
    RICHARD A. WHITE
    US Member - 2 Years
    Replies: 1645
    Topics: 130
    #184566

    I have used 847 for a while now. While up at Tomahawk this year, there were a group of *cough* fine gentleman* cough*, that were using the Permatex Ultra Black.
    While watching those, *cough* fine gentleman* cough*, use the Ultra Black, I noticed how much easier it was while sealing gear cases, than the 847.
    Other pluses include, the can of Ultra, did not puncture like the paper thin 847 tube, the Ultra black was also very easy to apply from the canister with the attached spout to control the bead and where it went. I have since bought a can of Ultra Black for future use when I run out of 847, which by the way, got punctured while in my tool case. 🙁

    http://www.richardsoutboardtools.com

    bobw
    bobw
    US Member - 1 Year
    Replies: 640
    Topics: 28
    #184600

    The 847 can be pretty messy to work with so maybe I’ll try the Ultra Black on my next gearcase. If I remember correctly, doesn’t the Ultra Black need to cure for an hour or so before you fully tighten the case fasteners?

    Bob

    1954 Johnson CD-11
    1956 Johnson RD-18
    1958 Johnson QD-19
    1959 Johnson QD-20

    RICHARD A. WHITE
    RICHARD A. WHITE
    US Member - 2 Years
    Replies: 1645
    Topics: 130
    #184604

    The 847 can be pretty messy to work with so maybe I’ll try the Ultra Black on my next gearcase. If I remember correctly, doesn’t the Ultra Black need to cure for an hour or so before you fully tighten the case fasteners?

    Direct from the can:

    Apply a 1/16th to 1/4 inch continuous bead to one surface, surrounding all bolt holes.. Assemble parts immediately: finger tighten until material begins to squeeze out around flange. Let dry one hour, then tighten to torque specs, allow 24 hours to fully cure before filling with fluids.
    NOTE>>>>
    NOT to be used as a head gasket or in contact with gasoline!!!!!!!!!!!!!!!

    http://www.richardsoutboardtools.com

    bobw
    bobw
    US Member - 1 Year
    Replies: 640
    Topics: 28
    #184605

    Richard,
    OK thanks.

    Bob

    1954 Johnson CD-11
    1956 Johnson RD-18
    1958 Johnson QD-19
    1959 Johnson QD-20

    Avatar
    rudefan29070
    US Member - 1 Year
    Replies: 23
    Topics: 9
    #184629

    Thank you for the info and procedure Richard. I will do it just like you describe. But when you say a “can” of Ultra Black, does it not come in a tube. the “Ultra Black” I picked up was in a tube not a can. Just making sure I got the right stuff.
    Thanks again.

    RICHARD A. WHITE
    RICHARD A. WHITE
    US Member - 2 Years
    Replies: 1645
    Topics: 130
    #184635

    It is available in either form, the can seems more logical to me…

    http://www.richardsoutboardtools.com

    Avatar
    fleetwin
    US Member - 2 Years
    Replies: 2753
    Topics: 33
    #184662

    Well, the complaints with 847/1000 sealer are surely valid, pretty tough to work with….The worst part is trying to remove it if the gearcase has to be disassembled again for some reason like failing a pressure test. Just wish the stuff was available in a smaller tube with a smaller opening, which might make controlling it during application a little easier. All that negative stuff being said, the stuff is an excellent sealer that can compensate for minor sealing surface imperfections, and is impervious to gasoline and most chemicals it will come in contact with.
    I get frustrated when sealing up OMC clamshell gearcases is passed off as something easy, that most anyone can accomplish. True, most anyone can probably get one the these gearcases back together and somewhat operational, but it is very unlikely to be sealed up properly, and what good is that…. So, being “old school” and set in my ways/aka stubborn, I will continue to wrestle with the 847/1000 sealer. I would strongly caution against using alternative sealers on OMC crankcases that call for use of the 847/1000 sealer in conjunction with spaghetti seal also.

    Tubs
    Tubs
    US Member - 1 Year
    Replies: 2406
    Topics: 147
    #184663

    .

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    • This reply was modified 2 weeks, 2 days ago by Tubs Tubs.
    Tubs
    Tubs
    US Member - 1 Year
    Replies: 2406
    Topics: 147
    #184664

    It is available in either form, the can seems more logical to me…

    Once opened shelf life is limited.
    If your not using it regularly its
    easier to throw away a $5.00 tube
    than a $20.00+ can.

    --

    RICHARD A. WHITE
    RICHARD A. WHITE
    US Member - 2 Years
    Replies: 1645
    Topics: 130
    #184667

    This is the can I was referring to….

    http://www.richardsoutboardtools.com

    Attachments:
    Tubs
    Tubs
    US Member - 1 Year
    Replies: 2406
    Topics: 147
    #184670

    That’s the one I just through away which
    I had only used once. I’m sure there was
    more in the can but it had solidified into
    the valve. After messing with it for a half
    hour without success I pitched it.

    --

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