Stage 1 - Preparing the surface.
Carefully prepare the location of the transducer
using an 80grit sand paper and sanding block. An
electric sander can also be used. If the surface is
very uneven, starting with a 40 grit paper will make
it easier. Prepare a flat and smooth surface. With
GRP (fibreglass), sand down to the laminate
removing any coating such as gel wash or other
bilge paint. For steel and aluminium remove any
coating to expose the bare metal.
The mounting ring should sit absolutely flat on the
prepared area.
Clean the whole area with acetone and make sure
it is dry and free from grease and dust.
Stage 2 - Preparing the mounting ring.
Abrade the underside of the ring flange thoroughly
using 80 grit sand paper to achieve a rough surface
to aid the adhesion.
Keep the flange surface free from grease and water.
Stage 3 - Bonding the transducer ring.
Using rubber gloves to protect your hands, mix a
good quality epoxy (i.e. Araldite Rapid set) and
apply a layer of about 2.0mm thickness to the
underside of the ring flange. Too much may result in
excess epoxy entering into the centre contact area
and prohibit the transducer face making contact!
Locate the ring onto the prepared area of the hull
and hold it firmly down until it feels secure. To
avoid the ring moving from its position, tape down.
Leave for 24 hours to allow the epoxy to set before
fitting the transducer.
