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Thread: Mercury Mark 5H.....Never before seen.

  1. #1
    Team Member Mini Max's Avatar
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    Default Mercury Mark 5H.....Never before seen.

    Mercury Mark 5H.....Never before seen. That's because Mercury never made one. However, I always wanted the smallest green onion with an H tower. These engines are plentiful and I think the kids at the cottage could have some fun. Dad too.

    Every week I make large composite parts with glass/epoxy and there is always a small amount of catalyzed epoxy and glass wasted. I have been scratching my head for something to make with it.

    I was thinking of making a mold to do an H tower for the Mark 5 out of glass that fits the standard transom clamps and gear foot. In appearance proportionally smaller than the one on my KG7H. Then make a nose cone for the bullet with a low water pick up.

    Questions are;

    Any suggestions for props?
    Any hop up tips?

    I'm thinking to be as minimally invasive as to mods so that the engine could be returned to stock if desired some day. Except for Dad's motor of course.

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    Default Ask Mark Suter

    Mark Suter has a Mercury Mark 5 Racing Engine. I believe it was built by John Schubert a few years back. I've never seen it run but it sure is a cute little fella!! Hopefully someone on here will chime in with more information and possibly a few pictures.

    Austin Duggan, 78M

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    Team Member Tim Chance's Avatar
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    I have attached a photo of the Mercury 60-J that my son raced some 35 years ago. Wouldn't a MK-5 powerhead just bolt up to this racing lower unit? Don't know - just asking. Still have the motor after all these years.
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    Last edited by Tim Chance; 09-15-2008 at 10:57 AM. Reason: typo

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    Default

    No a Mark 5 powerhead will not bolt directly to a 60J lower unit. The powerhead on a Mark 5 works as the swivel on the saddle bracket. It's a rather unusual power head.

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    Team Member A/B Speedliner's Avatar
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    Default Mark 5 engine

    I have a Mark 5 on a 1959 JU Sid Craft listed for sale on my web page www.aeroliner-boats.com. John Snell rebuilt the engine.
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    Old Race Boats Still Flip You Out

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    Team Member BRIAN HENDRICK's Avatar
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    Default M5ha ???

    This purported back door[skunk works] M5HA 'Special' was displayed at Tomahawk recently. An alky motor with open exhaust. Maybe an attempt at a Class 'M' motor as that alky class was still active at that time.
    The crankcase on this one looks a bit odd;
    -more like a KE4 ?
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    Default Pictures

    Here are a few pictures of Mark Suter's Mercury Super 5 racer. These pictures were taken at his AOMCI meet during the fall of 2007.




  8. #8
    Team Member Mini Max's Avatar
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    I am never going to say never again. Cool photos.

    I tear into the first Mark 5 tomorrow night.

    Unusual engines to add to the list. This one, the powerhead is fixed, only the tower steers.


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    Team Member A/B Speedliner's Avatar
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    Default Mark 5 engine

    I have about 100 pounds of Mark 5 parts including powerheads, mid sections, lower units and clamp brackets as well as numerous other parts. If anyone is interested I will sell them at a reasonable price. I can post pictures if there is any interest.
    Old Race Boats Still Flip You Out

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    Default Only the tower steers...

    "Unusual engines to add to the list. This one, the powerhead is fixed, only the tower steers."

    With this setup any frictional losses in the gearcase result in driveshaft torque being transferred to the steering.. Not a good idea.

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