Stus-List Question about Maintaining DataMarine Knot meter's sending unit

Josh Muckley muckleyj at gmail.com
Wed Mar 27 12:19:25 EDT 2019


You're going to need a tool like a dental pick.  I use my pocket knife.  I
can't imagine any significant damage to the body of the unit and damage to
the o-ring is irrelevant.  There are plastic pry tools available for
delicate tasks but in a pinch you might have luck with the corner of a
credit card.

Josh Muckley
S/V Sea Hawk
1989 C&C 37+
Solomons, MD




On Wed, Mar 27, 2019, 12:10 PM kelly petew via CnC-List <
cnc-list at cnc-list.com> wrote:

> Hey Listers,
>
> I have an old datamarine knot meter.
>
> For 15 seasons, I have applied a heavy grease to the sending unit
> annually.  That’s it.
>
> Never had a problem until last season when it briefly leaked just after
> launch.  Before I could take any action, the leak stopped.
>
> But remembering this, this season, I decided to replace the two [2] “O”
> rings on the body of the sending unit.
>
> But, being careful not to damage the sending unit, I have been unable to
> remove the old rings by hand.
>
> Can everyone suggest a tool or technique for the removal of the O rings
> without risking damage?
>
>
>
> Thanks!
>
>
>
> Fair Winds,
>
> Pete W.
>
> Siren Song
>
> C&C30MKII
>
> Deltaville, Va.
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