IMCO lower question.
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IMCO lower question.

  1. #1
    Some guys never learn. bocco's Avatar
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    Default IMCO lower question.

    My recently purchased 97 DCB extreme came with what appears to be an IMCO lower unit. I can't find numbers or labels on it and I'm sure it's been repainted.

    Is there any way to tell if it is IMCO for sure and if it is just a case with stock internals or a complete unit. Without taking it apart of course.

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    Senior Member Nosjunkie's Avatar
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    Pull the prop and look at the drain plug.. My Imco has a red anodized retainer/hub at the rear..
    LIVE FREE OR DIE

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    Some guys never learn. bocco's Avatar
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    So my next question about the Imco deal is the water pickups. Mine has two holes at the bottom front. So far this year I have been on the Sac delta and Clear Lake. At least five different times I have sucked weeds into intake and overheated. The first few times I was saved by the Merc temp alarm. After that I started watching the temp gauge more carefully when I saw anything in the water.

    I'm getting tired of jumping out of the boat and cleaning out the intakes.

    Anybody else have this problem?

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  6. #4
    It's what we do BDMarine's Avatar
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    2 holes in the bottom would more likely be Mercruiser. IMCO lowers have 1 long slot for the pick up. Where are the weeds collecting and blocking the water flow?
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  7. #5
    Some guys never learn. bocco's Avatar
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    Quote Originally Posted by BDMarine View Post
    2 holes in the bottom would more likely be Mercruiser. IMCO lowers have 1 long slot for the pick up. Where are the weeds collecting and blocking the water flow?
    Could be a Mercruiser. It's on a 97 DCB extreme. I think it's a common setup for DCBs in those years. I might need to post up pictures to find out what I really have.

    The weeds are just sticking right in both holes. Lower front. They are easy to pull out but it's getting kind of old.

  8. #6
    Some guys never learn. bocco's Avatar
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    So if I did this right here's 3 pictures of the outdrive. Turns out to have 3 holes not two.
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  9. #7
    It's what we do BDMarine's Avatar
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    Sorry for the late reply. If you haven't already gotten your answer, that is not an IMCO. It appears to be a Merc with a nose cone.
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  10. #8
    F14
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    Sounds like you need a sea strainer if you don't already have one.

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    Quote Originally Posted by F14 View Post
    Sounds like you need a sea strainer if you don't already have one.
    A sea strainer is not going to stop debris from getting stuck in the drive water pick up.

  12. #10
    Some guys never learn. bocco's Avatar
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    So the weeds just get stuck at the entrance to the three holes. They are easy enough to pull out if the weather is nice and I'm wearing a swimsuit.

    So if that is an add on nose cone. How the hell does the water get up to the upper part of the drive? This boat is new to me but I am assuming that it might have been built with a high X dim and that why the low water pickup.

  13. #11
    It's what we do BDMarine's Avatar
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    Quote Originally Posted by bocco View Post
    So the weeds just get stuck at the entrance to the three holes. They are easy enough to pull out if the weather is nice and I'm wearing a swimsuit.

    So if that is an add on nose cone. How the hell does the water get up to the upper part of the drive? This boat is new to me but I am assuming that it might have been built with a high X dim and that why the low water pickup.
    It looks like the old Bob's nose cone. Before installing the nose cone you drill a hole(s) in the Merc housing to allow water to get to the water inlet passage.
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