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Thread: BP motors

  1. #46
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    Quote Originally Posted by milkdud View Post
    Is the fwd most pinion the reverse pinion? If so can it and its pinion shaft just be removed for safety if you decide to run one of these lower units? Ive got one and wonder what the safest way to run one of these if a person decides to. Mine needs to come apart carefully sometime to inspect for problems before a run and wonder while its apart if the reverse stuff could disappear. When I purchased my SBP the shift shaft was not present and only run in FWD as it looks now. Mi[QUOTEIs=CNC_Guy;2921448]
    [/QUOTE]

    No, the is shift was in the exhaust housing/mid above all this

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  3. #47
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    Quote Originally Posted by milkdud View Post
    Is the fwd most pinion the reverse pinion? If so can it and its pinion shaft just be removed for safety if you decide to run one of these lower units? Ive got one and wonder what the safest way to run one of these if a person decides to. Mine needs to come apart carefully sometime to inspect for problems before a run and wonder while its apart if the reverse stuff could disappear. When I purchased my SBP the shift shaft was not present and only run in FWD as it lo;2921448]

    (The answer is no--all three shafts would have to be in place--they all carry the load, FWD or REV)



    You need to get your tools and your Nikon and document the tear down, Conrad!

    Then we will have some high quality pictures!!

    This picture shows an early studs down, right hand rotation unit, without the steady rest bearing----it does not show the reduction gear or the shift mechanism.

    When you tear down your unit--you will see that the shift dog (vertical) engages the reduction gear, for FWD (up)

    ---And bypasses the reduction gear for REV (down)---and floats in the middle for N--

    (Your unit is probably a unit that has been modified not to shift--no shift shaft simplifies a change in the pits during a race)

    ---Confused?? (you've got my e'mail)

    Last edited by GENE LANHAM; 01-19-2017 at 02:26 PM.

  4. #48
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  6. #49
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    OK!!! Thanks Sam----

  7. #50
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    Quote Originally Posted by largecar91 View Post
    I have several of these gearcases both BP and Super BP plus a couple boxes of parts. I had some broken Pinion shafts!
    Don' throw any of that stuff away, Barry!! Remember what happened to the old Switzer Wings--

  8. #51
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    I will probably come up with something to use them on.
    2005 APR FORMULA 2 ROOKIE OF THE YEAR

  9. #52
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    The problem with shifting into reverse is that it was a 1/1 ratio, Forward was reduced ratio. with a big prop and things will go wrong......not that I was there.

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  11. #53
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    Not sure if I have ever seen that thred. Good read.

    L6fan57-88

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  13. #54
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    Quote Originally Posted by Dave S View Post
    The problem with shifting into reverse is that it was a 1/1 ratio, Forward was reduced ratio. with a big prop and things will go wrong......not that I was there.
    Where have you been, Dave?? Thanks for showing up----

  14. #55
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    Quote Originally Posted by GENE LANHAM View Post
    Where have you been, Dave?? Thanks for showing up----
    Dave's been down in the basement cooking up ... no, never mind, he doesn't even have a basement.

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  16. #56
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    You need to get your tools and your Nikon and document the tear down, Conrad!

    Then we will have some high quality pictures!!
    I either need to get you here to Iowa or me and the lower unit to Colorado. Either way I can take pictures and learn while you teach.
    L6fan57-88

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  18. #57
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    Steady bearing added to later BPsClick image for larger version. 

Name:	IMG_5761.jpg 
Views:	171 
Size:	402.0 KB 
ID:	367883

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  20. #58
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    Another view , the pinion gears were in the cut out space .Click image for larger version. 

Name:	IMG_5764.jpg 
Views:	284 
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ID:	367884

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  22. #59
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    Quote Originally Posted by baldad45 View Post
    Steady bearing added to later BPsClick image for larger version. 

Name:	IMG_5761.jpg 
Views:	171 
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ID:	367883

    The Steady Rest Bearing was a mod for the early units--and was included in the SBP--

    The 'Highliner' shows its location in the Right Hand unit--

    Everything on the propshaft switched places in the Left Hand unit--

  23. #60
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