Section 11
HULL/BODY
Sub-Section 02
(ADJUSTMENT AND REPAIR)
11-02-27
Compound Fractures
Possible Causes:
– Thickness of fiberglass laminate.
– Direct result of impact.
Compound fractures are those that have gone
past the gelcoated surface and in through the lay-
ers of fiberglass laminate. Two types of repairs
have to be performed. The first is to restore the
structural integrity of the damaged area. Fracture
types can vary from a simple crack to a large hole.
Usually, fiberglass reinforcement becomes nec-
essary, especially if the fracture can be attributed
to weakness. The final part of the repair is the
gelcoating, which cannot be done until the interior
and exterior laminate surfaces have been re-
paired.
Outside
Remove the damaged gelcoat and fiberglass with
a 24-grit disk using a power sander. Grind outward
at least 2 inches from the fracture to allow the
patch to bond to strong material. Cut enough piec-
es of fiberglass mat necessary to build up the ar-
ea. The pieces should be cut so they overlap each
other by at least a half inch. For a smoother finish,
the last layer should be fiberglass cloth. If the frac-
ture is small enough all you may have to do is fill
the area with an epoxy filler.
Inside
For the interior repair, you can grind more. This
will allow for more fiberglass material which will
strengthen the area. If the fracture opening is too
large after surface preparation, you may need a
backing support to cover the opening. Cut alter-
nating pieces of fiberglass mat and cloth in over-
lapping sizes.
PATCHING THE REPAIR AREA
Outside
The outside should be done first. Wipe clean the
area with acetone on a cloth, then mask off area.
For a small crack use an epoxy filler in the same
way you would use Bombardier’s gelcoat repair
putty. When laying up a larger area you will use
mat, cloth and fiberglass resin and hardener. Use
a clean container to mix the resin, mix only what
you will need. Follow the recommended catalyst
ratio.
Using a clean paintbrush, brush the mixed resin
on the surface. Place the smallest piece of mat
over the fracture and then wet out the mat. Fol-
low with the remaining pieces of mat and final lay-
er of cloth. While wetting the pieces make sure
you work the air bubbles out and saturate all the
pieces evenly. Try to work quickly, you may only
have 15 or 20 minutes. You may clean the brush
with acetone.
Wait until the repair has hardened before moving
on to the interior repair. If the size of the opening
is too large for the pieces to maintain the proper
shape, you will have to use a backing support. It is
a shaped piece of cardboard that fits flush to the
interior surface and has a plastic layer on the re-
pair side. It is held in place by tape or a support.
Inside
Wipe down the area with acetone on a cloth. Ap-
ply the same procedure as for outside repair when
laminating the alternating pieces of fiberglass ma-
terial. If a backing support was used, remove it
before starting the repair. After the area has hard-
ened, remove sharp edges of material from sur-
face. If required paint the surface.
SANDING
Outside
This surface will have to be prepared for applica-
tion of gelcoat. The size of the area will determine
the gelcoating procedure to be used. Refer to the
repair procedure for minor gelcoat fractures.
BUFFING AND WAXING
Refer to the buffing and waxing for
Minor
Gelcoat Fractures
.
TOOLS AND MATERIALS LIST
Tools
– safety glasses
– air mask
– white cloths
– sanding block
– putty knife
– plastic film
– stirring stick
– cover sheets (for Sea-Doo)
– scissors
– buffing pad
www.SeaDooManuals.net
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