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  1. #1
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    1647-5675 housing

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Name:	IMG_1978.jpg 
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ID:	527510 I picked this thing up thinking to put a set of mercury gears in it but nothing fits it the number on it pulls up nothing on it 1647-5675 is it scarp are what

  2. #2
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    i'd scrape it.. mainly cause it had ta have tha carrier pinned for some unknown reason....

  3. #3
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    Did they ever "pin" them when they coned or rebuilt them, to prevent damage or only after the carrier spun?
    I still have one coned case with the keyway torn out that I haven't tried to fix yet.

    SuperTrump

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  5. #4
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    Quote Originally Posted by David - WI View Post
    Did they ever "pin" them when they coned or rebuilt them, to prevent damage or only after the carrier spun?
    I still have one coned case with the keyway torn out that I haven't tried to fix yet.
    Pretty sure they're pinned after the damage. I dont recal ever hearing of anyone doing it for preventative reasons but i could be wrong

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  7. #5
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    Click image for larger version. 

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ID:	527531

  8. #6
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    The gears were bad, all I saved was the drive shaft and shims gear end is smaller than a mercury drive shaft

  9. #7
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    Quote Originally Posted by Asstracker View Post
    Pretty sure they're pinned after the damage. I dont recal ever hearing of anyone doing it for preventative reasons but i could be wrong
    your right... think its kinda a "normal" thing with OMC stuff but not tha merc cases...

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  11. #8
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    Could it possibly be an XR4 case? What is the diameter of the bullet? 4 1/4" or 4 3/4"?

    Is there a retainer nut for the driveshaft under the water pump base? If not, it is an old preload pin case.

    Pull out the forward gear and look for a part number on the gear. Search the part number to try and identify the gearcase.

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  13. #9
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    That is the parts number on the housing, same place as mercury, let me know if you find anything 1647-5675


  14. #10
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    Click image for larger version. 

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ID:	527532Click image for larger version. 

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ID:	527533

  15. #11
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    The skinnier shaft is from an early preload pin lower unit. Looks just like mine without the bearingClick image for larger version. 

Name:	IMG_20231206_160620899.jpg 
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ID:	527555 The other end should look like this.Click image for larger version. 

Name:	IMG_20231206_160628523.jpg 
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ID:	527556 Mine is from a 1980/81 225

  16. #12
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    It is an XR4/XR6 case. Small bullet. Don't scrap it unless the bore where the carrier rides is warped. Yes some pin the drag race cases as preventative especially when they are just made to do 1/4 mile pulls. Did the case have a reverse gear in it when you pulled it apart?

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  18. #13
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    this is an early XR6.. (bobby v. built for me a long time ago)... notice how tha cavitation plate extends past tha tail end.. tha XR4 case it stopped even with tha tail end.. justa easy way ta tell tha difference (XR4 or XR6) if it is actually a small dia. case............
    Attached Thumbnails Attached Thumbnails New Mota 005.jpg  
    Last edited by tlwjkw; 12-07-2023 at 06:44 PM.

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  20. #14
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    And the casing 1647-5675 is not the later casing. If its xr4 then its gonna be the version where the cav plate does not extend. If the cav plate extends then It has to be an I-6 case. Either way I wouldn't scrap it...the bore looks ok, so someone would want it.

  21. #15
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    All have is a drive shaft, no gears I need all the in side

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