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43 viking convertible shaft question

Discussion in 'Viking Yacht' started by butch w, Nov 28, 2022.

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  1. butch w, Nov 28, 2022
    #1
    butch w

    butch w Member

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    2001 model year, I am curious how "freely" the shaft should be able to turn. Props are on and transmissions in neutral, cutlass bearings are still looking the same from survey 6 months ago (will get some pics up soon) and shaft seals same also they surveyed well

    It takes a fair bit of effort to move them in either direction, a lot more than I anticipated for sure. I know this is such a subjective question but looking for input whether they should be able to be moved by just gripping the shaft by hand and turning (can't do that) or having to grab ahold of the prop and get them to turn. Thanks any input is appreciated.

    Man 800

    ZF
    IRM305A.2
    1.581:1
  2. Capt Ralph, Nov 28, 2022
    #2
    Capt Ralph

    Capt Ralph Senior Member

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    Is this on the hill or in the water?
  3. butch w, Nov 28, 2022
    #3
    butch w

    butch w Member

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    Sorry about that it is on the hill
  4. Capt Ralph, Nov 28, 2022
    #4
    Capt Ralph

    Capt Ralph Senior Member

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    I'm sure she runs fine with no vibrations also.
    Probably 2 struts.
    Probably dry (no lube) also.

    When blocked up, many boat hulls distort. Some enough to miss- align the running gear binding the struts and propeller shaft.

    Some water based lubricant or even dish soap on the shafts to lube the cutlass bearings may help some if you really need to twist the shafts.

    The hull is relaxed and in a natural form when in the water.
    What has your diver reported while bottom cleaning is my next question?
    cleanslate likes this.
  5. butch w, Nov 28, 2022
    #5
    butch w

    butch w Member

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    Capt' Ralph,

    Thanks for your reply and that makes sense, yes it shifts smooth ran smooth fast proper top rpm etc. its actually only one strut but yes they were dry when I was messing with them. The yard blocked the boat pretty well plenty of supports etc (will get pics soon).

    The boat didn't get into the water this year until late July and fortunately I was able to run it pretty much every other weekend so I did not have any diver service and when the hull out last week it was surprisingly clean

    Thanks
  6. motoryachtlover, Nov 28, 2022
    #6
    motoryachtlover

    motoryachtlover Senior Member

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    based on the experience owning 3 inboard straight shaft boats and being particular about alignment, vibrations, etc., I think if a prop doesn’t turn relatively easily with 2 hands I think that can be indicative of an issue. BTW on my 54 Viking MY after a laser alignment I had to have a strut moved. Not saying you have an issue nor that this is your issue just thought it was worth a mention. I believe the strut had never been moved from the factory’s original location. After the laser alignment I could rotate the props relatively easy whereas before I could not.
  7. butch w, Dec 2, 2022
    #7
    butch w

    butch w Member

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    Captn Ralph,
    You were spot on. it is 2 struts. I simply forgot about the smaller ones forward of the large. I was in the yard today and lubed up the cutlass' with some soapy water and they certainly did turn an bit smoother and less effort. Will be doing a complete bottom job starting fresh. It has many layers of bottom paint so will see what type of performance improvements might happen.
    strut 1.pdf

    Attached Files: