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    Merc 4.1 Fuel pump problem

    I recently purchased a remanufactured 1975 I-6 Mercruiser 4.1 250cid Longblock, which I've finally finished putting all together and put it back in my boat last week. When I tried to start it up, it just kept cranking and never roared to life, which I quickly discovered was because the fuel pump...
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    New block

    A few days ago, I discovered a long crack underneath the intake manifold on my '75 Mercruiser I-6 250cid. After a little searching I found a block that is supposedly in good shape. The seller says that the camshaft is in the block, but the crank and pistons aren't, although he is including...
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    More water in the oil...

    Hey everybody, I'm new here and I have a few questions for anyone that is willing to help. I have a MerCruiser 165hp (GM I-6 250cid) in a '75 Cobalt 17'. I'm fairly new to boating, so bear with me. Anyway, I ran my boat about 6 times last summer and had no major problems until the prop ate an...
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