Hangar 9 Taylorcraft 20cc ARF Assembly Manual page 32

Step 10
Use a 4mm hex wrench to install the muffler and gas-
ket with the 4mm x 50mm socket head cap screws
supplied with the engine.
Step 11
Cut a manila card stock template measuring 2-inches
x 7-inches. Make a 3/4-inch diameter hole spaced
approximately 1/4-inch from one end.
32
Step 12
Place the fuselage inverted on the work table. Align
the exhaust template so that it is centered over the
exhaust and tape it in place on the fuselage with low-
tack tape.
Step 13
Remove the muffler then use a 5/64-inch hex wrench
to install the cowling with four 4-40 x 1/2-inch button
head machine screws. Make sure that the cowling is
installed under the exhaust cutout template. Use a
felt-tipped pen to mark the location of the exhaust
cutout on the cowling.
Note: Because the cowling does not fit flush with the
bottom of the fuselage, the exhaust template will
move a small amount when placed on the cowl.
Offsetting the template 3/16-inch forward and
outboard before marking the cowling will give a more
accurate cutout location.
Hangar 9 Taylorcraft 20cc Assembly Manual