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Author Topic:   screws below the waterline
chad posted 09-19-2000 01:00 PM ET (US)   Profile for chad   Send Email to chad  
I am installing the transducer for my depth finder. Since the mounting screws are below the waterline I do not want to make a mistake. Please advise on the following:
1. Drill a small pilot hole.
2. Shoot West System 102 in the hole.
3. Insert screws.
Thanks,
reeltime2 posted 09-19-2000 02:07 PM ET (US)     Profile for reeltime2  Send Email to reeltime2     
chad,
I would
1) drill pilot hole
2) countersink pilot hole w/ larger drill bit
to prevent spider cracking of gell coat
3) shoot 3m 4200 into hole & onto threads
of screws.
Rick
triblet posted 09-19-2000 02:07 PM ET (US)     Profile for triblet  Send Email to triblet     
The pilot hole should be just the very
tiniest bit smaller than the body of the
screw (the solid round part down the
middle). Counter sink the hole a touch
to keep the screw from chipping the gel
coat.

Don't use Epoxy (ie, West System). You need
to be able to adjust the transducer. Use
3M 101 in the hole and on the screw. Note
that 101 is WATER cured.

Chuck Tribolet

triblet posted 09-19-2000 02:09 PM ET (US)     Profile for triblet  Send Email to triblet     
4200 will work also, but, once you open
the tube, you gotta use it in a few weeks.
A tube of 101 will keep forever.

Chuck Tribolet

chad posted 09-20-2000 09:38 PM ET (US)     Profile for chad  Send Email to chad     
Thanks for the replies! Every time I have a project to complete, it leads to another project. My trailer bunks are in the way of my transducer. The trailer is a 1984 with rusting springs and old tires....so I priced new trailers today.
triblet posted 09-21-2000 10:00 AM ET (US)     Profile for triblet  Send Email to triblet     
The trailer bunks should only stick
a smidge past the end of the transom, and
the transducer should only stick a smidge
below the boat. Even if they line up just
wrong, they shouldn't contact.

Chuck Tribolet
triblet@garlic.com

jimh posted 09-21-2000 02:14 PM ET (US)     Profile for jimh  Send Email to jimh     
For transducer mounting, you might want to see:
http://continuouswave.com/maintenance-logs/transomTransducer/

There is a close-up photograph of the transducer's relationship to the hull bottom.

--jimh

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