Great Planes U-Can-Do SF EP/GP .80 ARF - GPMA1272 - Manual (Page 22)

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2. If you installed a glow engine, locate the plywood dummy
engine parts and glue them together as shown. This dummy
engine is provided as an aid to mount the cowl accurately
without the engine in place.
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3. Temporarily remove the engine mount and engine from
the fi rewall. Attach the dummy engine to the fi rewall. Only two
6-32 x 1/2" [13mm] screws are required to hold the dummy
engine in place. Put a few washers on the bottom screw to
prevent the end of the screw from contacting the fuel tank.
The top screw will go over the top of the tank so washers are
not required.
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4. Put four pieces of masking tape onto the fuselage sides
in the locations shown (two on each side). Mark onto the
tape pieces exactly where the cowl mounting screw holes
will be drilled. The holes should be located in the center of
the thickness of the fi rewall. Use a ruler to draw straight lines
exactly 4" [102mm] long aft of your cowl screw hole marks.
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5. Fit the cowl onto the fuselage so that the prop adapter
face (or the dummy engine front) is approximately 3/32"
[2.4mm] forward of the front of the cowl. Align the colors on
the cowl with the MonoKote color scheme on the fuselage
and temporarily tape the cowl in place when satisfi ed with
its position. From the lines you drew on the tape, transfer the
cowl mounting hole marks onto the cowl. Drill 1/16" [1.6mm]
holes through the marks on the cowl and into the fi rewall.
Use the templates you made in step 1 to trace the patterns
onto the cowl.