Recent content by jsmith3102

  1. J

    mercruiser 350 with 305 heads?

    I have a 1994 Mercruiser with a strange setup?? Is it ok to have a mercruiser 350 block with 305 heads? what will result from this.. HP difference? I have a blown head gasket and am wondering if this caused it.
  2. J

    is it a 350 or a 305?

    I have a sea ray mercruiser engine and the party I bought the boat from said they replaced the block but what I don't know is if they replaced it with a 350 or a 305. How can I tell. I do have the head off. Can I measure the size of the cylinder? The top end suggests a 305 but that is no guarranty.
  3. J

    Water in all the wrong places...

    I have a mercruiser 5.0L 305 V8.... Recently it had about 4 quarts of water in the oil, and soft siezed. I put a wrench on the front bolt and got it free. I pulled all spark plugs. One drained like a faucet and all had water on them. I pulled the head off the side that drained water out and...
  4. J

    mercruiser 5.0 - upgradable to 5.7 ?

    I have a 1994 mercruiser 5.0 can I just buy a long block 5.7 and put all my stuff off my old 5.0 on it? I was also leaning toward a new 2008 long block vs a rebuilt... Thoughts? Anyone know if I will really tell the difference in power?
  5. J

    seized engine and water in oil

    I have a 1994 5.0 Mercruiser 305 and have water in the oil. I was on the river and noticed the engine was not running perfect. It was vibrating a little more than normal at idle and I lost a few rmp's at top end. We drove for a while until I could get some tools to check things out. I opened up...
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