Removing inboard diesel - effect on JR balance

  • 06 Apr 2021 22:59
    Reply # 10280610 on 10241595

    I had a Yanmar YSE12 in Redwing and when I pulled it out the Stern lifted a inch or more. 

  • 27 Mar 2021 21:22
    Reply # 10242275 on 10241595

    That’s really helpful David - thank you! I hadn’t realised the Yanmar would be so light and, yes I’m planning on putting a small outboard on instead.  Great idea with the water tank too!



    Last modified: 27 Mar 2021 21:23 | Anonymous member
  • 27 Mar 2021 20:23
    Reply # 10242206 on 10241595

    Those little Yanmars weigh almost nothing. I once had one in a boat and was easily able to lift each end of the engine by hand when replacing the mounts. So the engine will only be a very small percentage of the overall weight of your boat. Removing an old diesel from a boat is a good thing, this is coming from someone who is a huge fan of outboards. You get rid of all the complications of a diesel motor including oil leaks, the smell of diesel, and the complications of propshafts etc. I am guessing you might be fitting an outboard as an alternative? In which case even though an outboard is not very heavy the weight would be right at the stern which would help to counterbalance the weight lost from the diesel. You could also utilise the space now empty because of the removal of the diesel for storage, or fit a flexible water tank which will put some weight back into the boat.

    You will loose the battery charging capability of your diesel motor, but this can easily be replaced by solar, or depending on which outboard you choose it may have battery charging capability.

    Last modified: 27 Mar 2021 21:00 | Anonymous member
  • 27 Mar 2021 17:50
    Reply # 10241958 on 10241595

    Thanks for the quick reply Tony. It’s a Yanmar 15hp.  


  • 27 Mar 2021 17:22
    Reply # 10241866 on 10241595

    You don't say what sort of engine you have, but a typical engine and gearbox for a sail boat of that size would weigh in the region of 120 kg. It's not a massive amount of weight, and is comparable to a couple of smallish people. I wouldn't worry too much about it. If need be, moving a few things around in the boat should be able to compensate that.

  • 27 Mar 2021 15:10
    Message # 10241595

    Hi Folks

    I'm looking for a bit of advice.  I own a 1970's Samphire 26 with a Sunbird JR conversion.  The boat has an inboard diesel I am think of removing and sealing up the remainder of the through hulls.  Does anyone have experience of doing this with their boat - if so, how did removing the engine (quite heavy) affect the balance of the boat and what did you need to do, if anything, to compensate.  The boat already sails a fraction nose down IMHO.

    Any advice, theories, 'don't do it!''s would be greatly appreciated.

    Many thanks.


    Last modified: 27 Mar 2021 15:11 | Anonymous member
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