GREAT PLANES U-Can-Do 3D.46 Instruction Manual page 16

6. Align the ruler with the line on the fuselage. Mark the
center of the cowl mounting block on the cowl 4" from the
reference point. Drill a 1/16" [1.6mm] hole through the cowl
and the mounting block at the mark. Enlarge the hole in the
cowl only with a 3/32" [2.4mm] drill. Mount the cowl to the
block with a #2 x 3/8" [9.5mm] screw and a #2 washer
7. With your assistant holding the cowl in position, mark,
drill and mount the cowl to the three remaining cowl
mounting blocks the same way
8. Remove the cowl. Using alcohol, clean the reference
marks off the fuse.
9. Use the filler valve mount from a Great Planes Handy Mounts
set (GPMQ6000), or fashion a mount from 1/8" [3mm] plywood
(not included) for the fuel filler valve. A Great Planes Easy-
Fueler for glow fuel was used on this model (GPMQ4160, not
included with this kit). Use epoxy to securely glue the filler valve
mount to the firewall in a location where the filler valve will be
accessible outside the cowl when it's time to fuel the engine.
10. Use thin cardboard or plastic to make templates for
the muffler, mixture screw, filler valve and glow plug cutouts
in the cowl. Tape the template(s) to the fuselage accurately
indicating the positions. Note: With two-stroke engine
installation we installed the muffler bolts through two 1/4"
[6mm] holes in the right side of the cowl. This is the time to
decide how you are going to mount your muffler.
11. Remount the cowl under the templates. Use a felt-tip
pen to transfer the holes in the template onto the cowl.
Remove the templates and the cowl.
12. Cut out the holes in the cowl with a high-speed rotary
tool and a small cutting bit.
13. Cut the air opening in the front of the cowl as shown.
Note: Do not remount the cowl. The tank, fuel line and
throttle pushrod still need to be installed.
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