Hobbico Spectrum Assembly Instructions Manual page 19

will be removed for the muffler.
6. Slide the cowling into position. Temporarily
attach the propeller and spinner to the engine.
Position the cowling to have 1/8" [3mm] clearance
between the spinner backplate and the front of the
cowling. Drill 1/16" [1.6mm] pilot holes for the cowl
screws. Remove the cowling, and drill the locations
for the cowl mounting screws using a 1/8" [3mm]
drill bit. Wick thin CA into the holes on the fuselage
to harden the wood, which will prevent the screws
from stripping the underlying wood. Attach the
cowling to the fuselage using four 3mm x 10mm
sheet metal screws.
7. Attach the muffler to the engine. Carefully
trim the cowl, removing small amounts of material
as you progress to allow for a 1/4" [6mm]
clearance gap between the cowl and the muffler.
8. Apply the decals to the cowling, lining them
up with the trim scheme on the fuselage.
Note: Use scraps from the plastic sheets to make
reinforcements behind the holes of the cowling. It
is also suggested to apply a strip of fiberglass cloth
along the inside seam of the cowling for added
strength and durability.
9. Attach and install the fuel lines to the
carburetor and muffler as shown in the photo.
Attach the vent line to the muffler, and the fuel line
(with the clunk) to the carburetor (or needle valve
assembly).
Note: If your engine's carburetor is inaccessible
with the cowl in position, now would be a good time
to add a Great Planes Fuel Filler Valve (not included,
GPMQ4160) to the side of your aircraft. Instructions
for installation are included with the valve.
Finishing the Cockpit
Use a sharp hobby knife, scissors or Lexan
shears to trim the pilot figure. Lightly sand the
mating surfaces. Hold the two parts of the pilot
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