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  1. M

    Mercrusier Timing

    hey everyone. Does anyone know the setting for dwell and timing for a 1989 Mercruiser 2.5L engine? I have misplaced my manual and am curious to know. Thanks in advance.:$
  2. M

    Mercruiser carb on OMC manifold

    Hey guys, I got my manifold installed (remember a Merc 2.5L, OMC outdrive and a riser problem). Riser fits fine now however the Mercarb 2bbl will not fit on the manifold. Aren't Mercarbs Holleys and OMC Rochesters? I know where I can get an adapter plate but just want to make sure this will...
  3. M

    OMC sterndrive shutter valve

    Let's try this again. Attached is (hopefully) a file that show how I conceptualize the shutter valve being installed. My original post messed up the file attachment so this is a add on. I don't know what is going on...gotta get reaady for work....such simple concepts, and yet no one seems to...
  4. M

    OMC sterndrive shutter valve

    Hey everyone, I got a new OMC manifold on the Mercruiser and now am wondering about the shutter valve. My mechanic says that the one I got is too big and I don't think they made any different sizes. I have attached a file showing the installation as I think it should be. If any of you can...
  5. M

    Carburetor differences

    Hey all. I have replaced my 3.0 OMC engine with a Mercruiser 2.5L and now have to go back to an OMC manifold. I purchased a new manifold and am wondering if the Mercarb will fit on the OMC manifold or if I have to get some kind of adapter. If I need to get an adapter, where is the best place...
  6. M

    Mercruiser Engine, OMC outdrive; exhaust elbow issue

    I replaced my OMC 3.0 L with a Mercruiser 2.5L. I had to kuse the old bellhousing and coupler and now I am faced with yet another problem. The exhaust elbow is 25 degrees clockwise of the riser on the outdrive. Does anyone know if they make an adapter for such a change, or do I have to replace...
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