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Bertram 42 Detroit 6v-92TA Repower with Yanmar or Cummins

Discussion in 'Bertram Yacht' started by etang789, Jul 5, 2017.

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  1. etang789

    etang789 Member

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    that depends on their price quote... but still need to find out later
  2. Capt Ralph

    Capt Ralph Senior Member

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    I'm a little concerned that the shaft may not be strong/safe enough for a 5 blade wheel.
    I don't recall a shaft rating mentioned.
  3. etang789

    etang789 Member

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    That is correct! I will be changing the shafts too as was discussed earlier in this thread to AQ22
  4. DOCKMASTER

    DOCKMASTER Senior Member

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    If you are replacing shafts then whoever you are buying shafts from should easily be able to provide you the taper and key dimension items Veem needs for props. Should all be standard so just need to confirm.
  5. Pascal

    Pascal Senior Member

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    90188D80-468F-4F69-A8A7-FAE49259CF0F.jpeg

    Make sure it s AQ22HS (high strength). The prop shop should be able to calculate the safety factor for the shaft and make sure it is adequate

    you won’t want this to happen (although in this case, failure was caused by a heavy handed previous captain and iffy wheel installation by diver)
  6. etang789

    etang789 Member

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    Again theres no one selling AQUAMET here locally, so im afraid to get these thing wrong when I order from overseas...

    I think was discussed before they dont make AQ22HS in 2.250" size
  7. Pascal

    Pascal Senior Member

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    Comes in every diameter
  8. MBevins

    MBevins Senior Member

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    Actually, according to the MFG web site AQ22HS only starts at a 2.5" Dia.
    If he has the real estate I suppose he could go up a qtr inch in diameter.
  9. etang789

    etang789 Member

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    Got some terrible picture from the shipyard today of my old propellers

    Attached Files:

  10. MBevins

    MBevins Senior Member

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    Is that a seized shaft cut off?
    That's UGLY.
  11. Pascal

    Pascal Senior Member

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    i had 2” AQ22HS machines by by local prop shop when I repowered my 53 Hatt 3 years ago. I forgot where the stock came from... I also had some 3 1/2” shaft re done after the breakage pictured above for the 84 I ran and the stock was made in italy.
  12. MBevins

    MBevins Senior Member

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    Not doubting that, but if the OP took his information off their website it clearly states HS starts at 2.5. Doesn't mean smaller isn't available to order.
  13. etang789

    etang789 Member

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    Showing the original prop is 30x32.

    much bigger than I expected
  14. MBevins

    MBevins Senior Member

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    Definitely, my 44 Viking only has 24 's
  15. Capt J

    Capt J Senior Member

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    They might've cut down the 2.5" to 2.25" on a lathe......I would think a good prop shop could do that pretty easily.
    MBevins likes this.
  16. Slimshady

    Slimshady Member

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    Get a splined shaft and props not keyed.
  17. etang789

    etang789 Member

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    Here is the suggestion from VEEM I would have expected for a 5 blade?

    Propeller Quotation
    Propeller style: VEEMStar-LC
    Propeller diameter: 27 inch
    Pitch: 30 inch
    Effective pitch: 31.5 inch
    Blades: 4
    Blade area ratio: 75%
    Interceptor: Included (1.0mm)
    Extra interceptor strips: Not included
    Shaft size: 2.25 inch
    Hand: LH/RH Pair
    Packaging: Included
    Bore Details: SAE

    Dynamic balancing to ISO G2.5. CNC machined to better than Class S. Blade tracking better than ± 1mm (0.039inches). All tapers blued to 70%.
  18. DOCKMASTER

    DOCKMASTER Senior Member

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    I would ask them how came to those props. You had 30x32 before and now they are recommending 27x30? Even with effective pitch of 31.5 if you want to call that same pitch as before , I would ask them why they are suggesting such a smaller prop? In a previous post you said Veem suggested a much different propeller. Are you sure the correct info was provided this time and nothing got lost in translation?
  19. etang789

    etang789 Member

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    Yea double checking now!

    First suggestion from them was

    Propeller style: VEEMStar-LC
    Propeller diameter: 29 inch
    Pitch: 29.5 inch
    Effective pitch: 31 inch
    Blades: 4
    Blade area ratio: 75%
    Interceptor: Included (1.0mm)
    Extra interceptor strips: Not included
    Shaft size: 2.25 inch
    Hand: LH/RH Pair
  20. etang789

    etang789 Member

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    Heres some pictures to update you guys on the progress...

    All the engine work is done.
    Hull Bottom Done.
    New Salloon Door Installed.

    Now working on the 12v wirings.
    No updates from VEEM or ACME yet.

    Finally! Feels like my B42 Repower Project is coming closer to the finish line. I’m guessing a lot of ppl may like or dislike this glass door mod, and my shipyard thinks is a waste of money! But here you go!

    243220757_10100480545210490_7782011066863800348_n.jpg