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  1. #46
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    The stacks are a homemade attempt to increase power, but do not work ... they do not give as much power as this motor has with its natural internal tuning.

  2. #47
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    wheel
    Attached Thumbnails Attached Thumbnails hydro 035.jpg   hydro 036.jpg  

  3. #48
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    One lower unit has shear pins one does not.

  4. #49
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    one prop is a Johnson, Oakland calif, # 8 16. small prop is michigan, #7 10. both have pins.. prop with no pin is #156 no name

  5. #50
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    The props with no name are Litton. It might be there if you clean it up more.

  6. #51
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    Sam, how bad are you drooling right about now???

  7. #52
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    These are probably the 2 motors that DaveS thought he had a lead on.

    I don't need a bib unless I think I can own them

    So far, he doesn't have a complete factory powerhead ... I'm a bit closer less a starter that I have a possible lead on and the fact that I have a 1962 type lower unit rather than a '64 or '65


    590 on the model serial tag means special short stroke crank ... may or may not be in one of these powerheads, but with the other special pieces missing I would not be surprised if it is not there

  8. #53
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    Now if there was a chance of buying one of both of these and/or some spare stuff like starter and reduction gears or the tapered props ... I'd need a big bib

  9. #54
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    Hello
    Let me send you some pictures of the boat, gears..then you can make me a bid if you like. But thanks for all the help ID ing it all.

  10. #55
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    The boat and all the parts have been sitting in the barn since 88.

  11. #56
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    Good stuff Sam thanks for the post

  12. #57
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    Hello
    The boat is 10' long. I read there were other special pieces missing, what are they?
    Attached Thumbnails Attached Thumbnails hydro 049.jpg   hydro 050.jpg   hydro 051.jpg   hydro 053.jpg   hydro 055.jpg  


  13. #58
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    The insert for the header is intersting, two inserts, two diff diam. Anyone have an Idea on what make the boat is? The casting # is on the lower unit, is it from the same year as the lower unit with the vin taqg on?
    How many engines did they make in 65, and for the full production run?
    Thanks again.
    Attached Thumbnails Attached Thumbnails hydro 060.jpg   hydro 061.jpg   hydro 064.jpg  

  14. #59
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    My guess on the hydro would be DeSilva. If it is a DeSilva there is a number stamped into the stringer or cross piece inside near the transom


    10 feet is unusually short for an F class hydro. Even today the shortest F's are 12 ft 6 inches; years ago 14 was considered a better size for F and X

  15. #60
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    Quote Originally Posted by rwk View Post
    The insert for the header is intersting, two inserts, two diff diam. Anyone have an Idea on what make the boat is? The casting # is on the lower unit, is it from the same year as the lower unit with the vin taqg on?
    How many engines did they make in 65, and for the full production run?
    Thanks again.

    The header lengths are all wrong for motors with the limited rpm capacity of the McCullochs. You can only rev them to about 6,200 rpm without a connecting rod coming out the front of the block. This is because the stroke and connecting rod geometry give a very high piston speed for the rpm ... their pistons are moving faster at 6,000 than many other motor's pistons would be going at 10,000+ rpm. Pipes for 6,200 rpm would be more than 4 feet long. When I was interviewing Jack Oxley about these motors years ago, when I asked about pipes, it made him pause and say something like ... Good Lord - NO! ... and then a comment about the excessive length needed.

    Not sure where that casting number is?

    No one knows the individual year production of these motors, but everyone who worked at the factory is sure the production was 500 motors.

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