Search results

  1. M

    Click and short drop in power at high RPMs - 1969 Mercruiser 120hp 2.5l

    Under high RPMs (>2700), my 1969 Mercruiser 120hp 2.5L makes one relatively loud click followed by a very short drop in power then resumes normal operations. This happens within 1 second. I just installed a new head block, so thought that may have something to do with it. It almost sounds like a...
  2. M

    Puncture Hole in Head Block, Rusty Cylinder

    I have a 1969 Mercruiser 120hp 2.5L i4. Thought I blew the head gasket due to milky oil and water shooting out of spark plug holes. She'd turn over but wouldn't fire. When I took off the head, I found a puncture in the head next to the valves (see photo). Cylinder 1 is rusty but no visible...
Top