Top Flite TOPA0970 - Manual (Page 23)

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2. We also made a hole in the cowl for the fuel fi ll
line. Start with a small hole (we chose to make the hole
in the black paint on the cowl because the included fi ll
line plug is black; be sure that the hole will clear the
fi rewall) and enlarge the hole until the fi ll line with the
plug inserted fi ts snugly when pushed into the hole.
When satisfi ed, coat the inside of the cowl around the
hole with CA to harden the surrounding fi berglass.
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3. Remove the cowl from the fuselage and prepare
additional paper templates for marking and drilling the
cowl mounting holes. The cowl will be held on by eight
screws, four per side. The forward cowl mounting holes
need to be drilled into the fi rewall in the approximate
locations shown. The aft holes need to be carefully
measured using the dimensions provided to accurately
drill the holes into the plywood plates pre-installed in
the fuselage.
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4. Drill 1/16” [1.6mm] holes into the fuselage at
the marks you made. Thread a #2 x 3/8” [9.5mm] self-
tapping screw into each hole and back it out. Apply a
drop of thin CA into each hole.
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5. Fit the cowl onto the fuselage. Temporarily
install the spinner backplate onto the engine (a 5/16”
[7.9mm] brass insert is provided for 5/16” crankshafts).
Use the prop washer and nut to hold the backplate
tight against the drive washer. Align the paint on the
cowl with the covering on the fuselage and also the
front of the cowl with the backplate. When satisfi ed,
tape the cowl in place (an assistant for this step is not
necessary, but is helpful).
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6. Transfer your marks from the paper template
onto the cowl. Remove the cowl and drill 3/32” [2.4mm]
holes into the cowl at your marks.
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7. Feed the fi ll line through the hole you made in
the cowl and install the cowl on the fuse using eight
#2 x 3/8” [9.5mm] screws and eight #2 fl at washers.
Install your needle valve and any other connections
necessary.