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1993 Canados with MAN d2842lze; cruising speed?

Discussion in 'Canados Yacht' started by vic13r, Feb 12, 2020.

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  1. mapism, Feb 14, 2020
    #21
    mapism

    mapism Senior Member

    Joined:
    Aug 9, 2008
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    2,115
    Location:
    Sardinia
    The tubes bundle that I suggested to pull out and clean is the big bronze inner part of the heat exchanger, marked as # 5 in the diagram.
    The OR seat which can be prone to corrosion instead is NOT a specific part, but is just the area of the aluminum shell where the OR # 14 is pressed when the cover # 13 is closed.
    I highlighted that area in red below. Note that only that side is critical, because on the opposite side the OR seat is inside the round cover # 6 instead, which is made of bronze rather than aluminum.
    [​IMG]
  2. Fiammetta42, Feb 17, 2020
    #22
    Fiammetta42

    Fiammetta42 Member

    Joined:
    Sep 28, 2017
    Messages:
    130
    Location:
    Liguria Italy ( boat )
    A shorter stoked engine will like to rev more than a longer stroke one as well .
    It’s to do with mean piston speeds ,they are lower in a shorter stroke as not as far to travel .
    So if there is an optimum MPS in terms of oil lubricity , friction and heat dissipation the shorter stroked one can run at higher revs .

    Longer strokes often have a longer crank throw / leverage ( + more weight in the moving parts = more inertia ) and more lower down torque .Think length of bicycle cranks .
    The extra weight / inertia and distance to travel at a same MPS means lower rpms .

    They are built round MPS which determines the max rpm on the test bench .
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