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  1. J

    Need help putting antifreeze into block while circulating pump is dead!

    I'm starting a new thread to ask for help on putting antifreeze into my engine now that I figured out my circulating pump is not working. Long story short, I found out my circulating pump does not work when I tried to winterize my engine. So I believe the problem all along was the circulating...
  2. J

    Lifter Stuck - Merc 350 5.7 Thunderbolt

    I opened the value cover and found one of the rockers (3rd from the back of the boat) was not moving. I removed the rocker and found the push rod bent. I am assuming that was where the firecracker knocking sound was coming from. So it appeared the lifter was stuck. An old marine mechanic told me...
  3. J

    Serious Engine Knock!

    I have a 5.7 Mercruiser and it has developed quite a knocking sound. It puffs smoke through the carburetor and I though it was mis-firing so I changed all the plugs, wiring, rotor and cap. I seem to have water in the oil because the oil is a nice coffee color on the dip stick, as well as leak...
  4. J

    Mercruiser - water in oil and misfiring

    I have twin 2001 Mercruiser 5.7 V8 Thunderbolts. I recently heard a strange pinging noise while doing 5 mph going through a canal. I looked at my gauge and saw that I was overheating at 200-210 degrees. I shut that engine down returned with the other one. I noticed a coffee-beige colored...
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