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  1. M

    Mercruiser 3.0 Leaking Water On Top of Manifold

    No, sadly it is running along the back corner of manifold and then onto the wall and dripping down the plug.
  2. M

    Mercruiser 3.0 Leaking Water On Top of Manifold

    1)Put stabilizer in gas 2) Run the engine and spray fogging oil into carb and kill it. 3) After it has cooled take drain plug out of the manifold and block 4) Once drained put plugs back in and take hose clamps off of tstat 5) pour antifreeze down the hose until comes out tstat and pour it into...
  3. M

    Mercruiser 3.0 Leaking Water On Top of Manifold

    I used permatex high temp thread sealer on the bolts. The hose is not leaking or any of the hoses.
  4. M

    Mercruiser 3.0 Leaking Water On Top of Manifold

    Dear fellow boaters, This past fall I recently acquired a boat equipped with a Mercruiser io 3.0 engine that initially had starting issues. After conducting a thorough examination, I discovered a bent intake valve and promptly had the valve seat reseated at a trusted machine shop. Following...
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