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    Mercruiser 496mag pistons replacement

    Hey guys, did you ever replace an oem pistons with some aftermarket ones? I have low compression on 4 cylinders. We completely took apart the short block and found these 4 piston rings stuck, rusted, broken and we are not even able to take them out. Cylinder wall looks good with no obvious...
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    496 Mercruiser ignition power

    Update.. Problem solved by replacing the 90A fuse next to the starter.. Thank you everyone.
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    496 Mercruiser ignition power

    Thank you man, good point.
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    496 Mercruiser ignition power

    Guys do you know what kind of solenoids I gonna need? I know one is located by the starter and second one behind the 50A breaker correct? Thank you!
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    496 Mercruiser ignition power

    Question where
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    496 Mercruiser ignition power

    Hey guys, we just replaced the heads, basically took electric harness off and we put everything back together..now, I am not getting any power for ignition switch.. normally I have to turn the key on and ignition switch as well, there is a long beep and it's ready for start..(there should be a...
  7. R

    496 Mercruiser ignition power

    Hey guys, we just replaced the heads, basically took electric harness off and we put everything back together..now, I am not getting any power for ignition switch.. normally I have to turn the key on and ignition switch as well, there is a long beep and it's ready for start..(there should be a...
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    No power at ignition switch HELP! Please

    Will do. Yes I do have volt meter..
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    No power at ignition switch HELP! Please

    Yes it is and even if is not I gonna get something ON with "beep"..
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    No power at ignition switch HELP! Please

    Hey guys, did you ever heard about some "mercruiser alive wire"? I saw other post with similar issues and that guy was saying his alive wire was disconnected.. Any idea where is it located? Thank you!
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    Sedan Bridge 360 engine removal

    Hey guys, is here somebody who went through that process of removing the 496 engine from the sedan bridge and can share some pictures and tips with me? I will really appreciate that, thank you!
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    Rough running 496 Mag. White smoke. (Video attached)

    Water get in there probably when I was flushing the engine with a fresh water..I put the mystery oil in the cylinders immediately and let it sit for like a week.. everything was just fine and engine was running like a butter till last week when the issue began..we found 4 cylinders are giving me...
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    Low Cylinder Compression

    Do you have any pictures how exactly you pulled the engine out or some details? I will appreciate that, probably have to do a same thing. Thank you!
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    Low Cylinder Compression

    Do you mind to share the company who did that for you? Are we talking about "crazy" money? Thank you man.
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    Rough running 496 Mag. White smoke. (Video attached)

    Here is the video of port engine which I am having a hard time with. Hopefully you can hear that knocking what I am talking about. Thank you fellas! https://www.veed.io/view/10128429-27f1-49d9-9ef4-89f16a410689?sharingWidget=true&panel=share
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    Rough running 496 Mag. White smoke. (Video attached)

    Actually I replaced the plugs after the engine was already making the problems. I thought they were bad or wet.. didn't help
  17. R

    Low Cylinder Compression

    Hey man, how did you figure it out? Thank you for the update.
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    Rough running 496 Mag. White smoke. (Video attached)

    Engine was running like a butter 3 weeks ago. Since that time nothing changed. I replaced the spark plugs and was making sure about the ignition plugs. The other engine have it own gas tank. Thank you for any ideas.
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    Rough running 496 Mag. White smoke. (Video attached)

    Doesn't hold idle speed and making knocking noise. Not easy to start it up without throttle and making a black smoke from the exhaust and flame arrestor too. Oil, water pressure are ok, temperature as well. New spark plugs just installed. Water in the fuel? Fuel regulator? Cylinder pressure? I...
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