Re: K case I.D. no casting numbers

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November 12, 2017 at 3:43 am #67289
20mercman
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    It’s either a Mercury Mark 15 or 20. Most likely a Mk-20 as there were a lot more of them built. The boss on the starboard side is for mounting the linkage for the throttle/magneto. The boss on the port side is for the air pressure pump for the pressure tank.

    Steve