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  1. mariner1900

    Coupling Woes

    Hi All! Have just re-installed my 1974 140 HP Mercruiser engine to get ready for summer. Engine serial # 3826715. Drive serial # 3843829. The engine went back in easy but I have a problem with the alignment bar not fitting into the splines in the coupling, even with the engine again removed...
  2. mariner1900

    '74 model 140HP Hydraulic Lifters

    Hi all. I have a 74 model 140HP engine, serial # 3826715. Have some noisy hydraulic lifters and rather than muck around stripping, cleaning and re-fitting then hoping they then work properly I am going to fit a new set. (yes tappets have been adjusted correctly but still noisy) The original...
  3. mariner1900

    Mercruiser 140HP Engine Swap

    Hi All! I have a 140Hp GM 4 cylinder Mercruiser, S/N 3826715, approx. '74 model. I am contemplating swapping this engine with a '91 model 3.0LX, S/N 0D612416, that I have in the garage. The question is what needs to be changed on the '91 model to fit as I believe the rear engine mount bolt...
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