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    Re: Mark 15 Maintenance Question
    From: Paul Flint
    Date: 2005 Nov 21, 23:56 +0900

    Thanks for the input. Emboldened by your advice, I removed the screw
    and the metal clip and bent it ever so slightly inward. This seems
    to have solved the loose screw problem.
    Thanks again.
    On (11/21/2005 10:38:05 PM) Noell Wilson
    > Hi Paul,
    > I had good support from Davis - this may be their busy season.  If I  
    understand your question correctly, and if you have the traditional mirror, I 
    think the screw goes through the spring clip and into a nut that is in a 
    formed hole in the plastic.  Look on
    > http://www.davisnet.com/support/marine/parts.asp
    > for Repair Kit RO26G which has 8 springs, 3 screws, and 4 nuts for the Mk 15 
    or 25.  It's $4.  There is another kit that also includes the two Mk 15 
    mirrors for about $20.  All of this is for the traditional mirror.  I have no 
    experience with the whole horizon mirror.
    > You may also be able to bend the spring clip so it provides more resistance.
    > Regards, Noell
    > >>> lists@HONYAKU-PLUS.COM 11/21/2005 3:39:49 AM >>>
    > I realize that this is not quite on topic, but I sent the following
    > message to Davis support and got no response. I've had approximately
    > three month's experience with a sextant, so I figure anyone here
    > would know more about it than I.  Any suggestions would be
    > appreciated.
    > --------------------------------------------------------------
    > Hi there.
    > The index error adjustment screw on the horizon mirror (the one
    > farthest from the frame) seems to be too loose even when properly
    > adjusted. The screw is easily jogged out of position, which of
    > course allows the mirror to shift. The screw seems to move quite
    > freely from side to side unless completely tightened, which of
    > course gives high a IE on the arc.
    > As a result, I get 10' to 20' of "index error" in a very short
    > period of time (like after one reading) when taking sights even
    > after having adjusted the mirror. At first I thought it was the
    > normal error attributed to heating of the plastic, but it is just
    > too much fluctuation too quickly for that to be the case.
    > Is this a common problem? Or, better yet, can you suggest a fix for
    > it?
    > Thanks.
    > -------------------------------------------------------
    > Paul Flint
    > Kawasaki, Japan
    > N35 35' 41" E139 30' 30"
    Paul Flint
    Kawasaki, Japan

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